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C-5 Troubleshooting No Start / Intermittent Start Issues

I compiled a guide due to my issues, hopefully this will assist others who encounter no start issues. Remember this is only a guide to help, nothing more, please use the link if you need photo's to assist you. See something that needs changed or added please pm me the info..

Complete with photo's available at c5 no start
Let’s start troubleshooting why you car won’t start or has intermittent starting issues. If you turn the Key to the start position and hear a few clicks from the passenger footwell but the STARTER does not engage this guide may assist you. We start with the easiest checks and proceed to the pain in the *** checks.
1. First of all you want to check the DIC for codes that may help you track down the issue
The Diagnostic Display Mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the RESET button to turn off any warning messages
3) Press and hold OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.

Initially, on-board diagnostics go into an Automatic Mode which shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each
If none are present in a given module, you will see No More Codes on the display.
There are two kinds of diagnostic codes, Current and History designated with a letter suffix, C or ;H. A current code indicates a malfunction is present in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes.
More likely it's an indication of an intermittent malfunction.
Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.
Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except E/M. Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present;
press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press RESET
To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory.
Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5. They are available through Chevrolet dealers and mail order sources, such as Ecklers and Mid America.
The diagnostics for some diagnostic codes call for a scan tester. Also known as scan tools or scanners these units are really hand-held diagnostic computers. A little larger than a portable cassette recorder, powered by the car battery and connected to the diagnostic link connector (DLC); they collect computer module data and display it on a small screen. Scan testers are operated by a small keypad. Software is usually in plug-in cartridges covering a specific model year.
Where you might get stuck needing one of these pieces of equipment is when the Service Manual calls for operating a specific module with a scan tester. If you are trying to solve a diagnostic code and determine that a scan tester is required but don't have access to one; take the car to a service facility for repairs.

The following is a list of all valid DTCs for Corvette C5:

DTC B0016 RF/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low
DTC B0017 RF/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Open
DTC B0018 RF/Passenger Frontal Deployment Loop (Single Stage or Stage 1) Short to Ground/Voltage Out of Range
DTC B0022 LF/Driver Frontal Deployment Loop (Single Stage or Stage 1) Resistance Low
DTC B0024 LF/Driver Frontal Deployment Loop (Single Stage or Stage 1) Short to Ground/Voltage Out of Range
DTC B0026 LF/Driver Frontal Deployment Loop (Single Stage or Stage 1) Open
DTC B0051 Deployment Commanded
DTC B0053 Deployment Commanded with Loop Malfunctions Present
DTC B0090 Active Switch Voltage Out of Range
DTC B0091 Active Switch: Wrong State
DTC B0332 Outside Air Temp Sensor Short to Ground
DTC B0333 Outside Air Temperature Sensor Open
DTC B0337 Inside Air Temp Sensor Short to GND
DTC B0338 Inside Air Temperature Sensor Open
DTC B0348 Sunload Temperature Sensor Open
DTC B0361 Left Actuator Feedback Short to GND
DTC B0363 Left Actuator Feedback Open
DTC B0365 Right Actuator Feedback Short to GND
DTC B0367 Right Actuator Feedback Open
DTC B0432 Rear Defogger Relay Circuit
DTC B0433 Rear Defogger Relay Circuit
DTC B0441 Left Actuator Out of Range
DTC B0446 Right Actuator Out of Range
DTC B0502 RH DRL Relay Circuit
DTC B0503 RH DRL Relay Circuit
DTC B0507 LH DRL Relay Circuit
DTC B0508 LH DRL Relay Circuit
DTC B0516 Speedometer Signal Circuit Malfunction
DTC B0521 Tachometer Signal Circuit Malfunction
DTC B0605 BCM Internal Memory Malfunction
DTC B0605 Receiver Internal Memory Malfunction
DTC B0846 +5 Volt Reference Out of Range
DTC B0851 Battery 1 Out of Range
DTC B0856 Battery 2 Out of Range
DTC B1000 ECU Malfunction
DTC B1001 Option Configuration Error
DTC B1512 DIC Switch 1 Signal Short to Ground
DTC B1517 DIC Switch 2 Signal Short to Ground
DTC B1522 DIC Switch 3 Signal Short to Ground
DTC B1527 DIC Switch 4 Signal Short to Ground
DTC B1532 DIC Switch 5 Signal Short to Ground
DTC B1537 DIC Switch 6 Signal Short to Ground
DTC B1542 Oil Temperature Circuit Short to Ground
DTC B1543 Oil Temperature Circuit Open
DTC B2002 Fore/Aft Seat Motor Open or Short to GND
DTC B2007 Front Vert. Seat Motor Open or Shorted
DTC B2012 Rear Vert. Seat Motor Open or Shorted
DTC B2172 Seat Front Up Switch Shorted to Ground
DTC B2177 Seat Front Down Switch Shorted to Ground
DTC B2182 Seat Rear Up Switch Shorted to Ground
DTC B2187 Seat Rear Down Switch Shorted to Ground
DTC B2192 Seat Forward Switch Shorted to Ground
DTC B2197 Seat Reverse Switch Shorted to Ground
DTC B2202 Left Window Up Switch Circuit
DTC B2203 Right Window Up Switch Circuit
DTC B2204 Left Window Down Switch Circuit
DTC B2205 Right Window Down Switch Circuit
DTC B2206 Right Window Up Switch Circuit
DTC B2208 Right Window Down Switch Circuit
DTC B2222 LT Mirror Select Switch Circuit
DTC B2224 RT Mirror Select Switch Circuit
DTC B2226 Mirror Right Switch Circuit
DTC B2228 Mirror Left Switch Circuit
DTC B2232 Mirror Up Switch Circuit
DTC B2234 Mirror Down Switch Circuit
DTC B2236 Left Door Lock Switch Circuit
DTC B2237 Right Door Lock Switch Circuit
DTC B2238 Left Door Unlock Switch Circuit
DTC B2239 Right Door Unlock Switch Circuit
DTC B2242 Memory 1 Switch Circuit
DTC B2244 Memory 2 Switch Circuit
DTC B2252 Key Cylinder Switch Circuit
DTC B2253 Key Cylinder Switch Circuit
DTC B2262 Horizontal Position Sensor Circuit
DTC B2263 Horizontal Position Sensor Circuit
DTC B2264 Vertical Position Sensor Circuit
DTC B2265 Vertical Position Sensor Circuit
DTC B2272 Left Mirror Motor Circuit
DTC B2273 Right Mirror Motor Circuit
DTC B2274 Window Motor Circuit
DTC B2275 Window Motor Circuit
DTC B2276 Door Lock Motor/Mirror Heater Circuit
DTC B2277 Door Lock Motor/Mirror Heater Circuit
DTC B2278 Switch Indicator/Illum Circuit
DTC B2279 Switch Illumination Circuit
DTC B2282 Battery #1 Circuit
DTC B2283 Battery #1 Circuit
DTC B2284 Battery #2 Circuit
DTC B2285 Battery #2 Circuit
DTC B2286 LH Mirror Supply Circuit
DTC B2287 RH Mirror Supply Circuit
DTC B2403 Front Fog Lamp Switch Circuit
DTC B2408 Rear Fog Lamp Switch Circuit
DTC B2482 Backup Lamp Relay Circuit
DTC B2483 Backup Lamp Relay Circuit
DTC B2527 Horn Relay Circuit
DTC B2528 Horn Relay Circuit
DTC B2567 Folding Top Release Switch Circuit
DTC B2573 Hatch Release Switch Circuit
DTC B2578 Right Front Turn Signal Monitor Circuit
DTC B2583 Left Front Turn Signal Monitor Circuit
DTC B2587 Column Lock/Unlock Drive A
DTC B2588 Column Lock/Unlock Drive A
DTC B2592 Column Lock/Unlock Drive B
DTC B2593 Column Lock/Unlock Drive B
DTC B2597 Traction Control System Switch Circuit
DTC B2600 Seat Motor to Battery Voltage
DTC B2605 Seat Front Vert. Position Sensor Failure
DTC B2606 Seat Rear Vert. Position Sensor Failure
DTC B2607 Seat Horizontal Position Sensor Failure
DTC B2647 Ambient Light Sensor Circuit Low
DTC B2648 Ambient Light Sensor Circuit High
DTC B2721 PASS-Key Detection Circuit
DTC B2722 PASS-Key Detection Circuit
DTC B2723 PASS-Key Detection Circuit
DTC B2735 PASS-Key Programming Mode Active
DTC B2795 Suspension Control Select Switch Circuit Malfunction
DTC B2805 No Transmitters Programmed
DTC B2852 Telescoping Column In Switch Shorted to Ground
DTC B2857 Telescoping Column Out Switch Shorted to Ground
DTC B2860 Telescoping Column Position Sensor Failure
DTC B3577 Suspension Control Select Switch Contact Malfunction
DTC C0550 ECU Malfunction
DTC C0563 Calibration ROM Checksum Error
DTC C0577 Left Front Solenoid Circuit Low
DTC C0578 Left Front Solenoid Circuit High
DTC C0579 Left Front Solenoid Circuit Open
DTC C0582 Right Front Solenoid Circuit Low
DTC C0583 Right Front Solenoid Circuit High
DTC C0584 Right Front Solenoid Circuit Open
DTC C0587 Left Rear Solenoid Circuit Low
DTC C0588 Left Rear Solenoid Circuit High
DTC C0589 Left Rear Solenoid Circuit Open
DTC C0592 Right Rear Solenoid Circuit Low
DTC C0593 Right Rear Solenoid Circuit High
DTC C0594 Right Rear Solenoid Circuit Open
DTC C0615 Left Front Position Sensor Malfunction
DTC C0620 Right Front Position Sensor Malfunction
DTC C0625 Left Rear Position Sensor Malfunction
DTC C0630 Right Rear Position Sensor Malfunction
DTC C0665 Chassis Pitch Signal Circuit
DTC C0690 Damper Control Relay Circuit Malfunction
DTC C0691 Damper Control Relay Circuit Range
DTC C0693 Damper Control Relay Circuit High
DTC C0695 Position Sensor Overcurrent (8 volt supply)
DTC C0710 Steering Position Signal Malfunction
DTC C1214 Solenoid Valve Relay Contact or Coil Circuit Open
DTC C1217 Pump Motor Relay Contact Circuit Open
DTC C1221 LF Wheel Speed Sensor Input Signal is 0
DTC C1222 RF Wheel Speed Sensor Input Signal is 0
DTC C1223 LR Wheel Speed Sensor Input Signal is 0
DTC C1224 RR Wheel Speed Sensor Input Signal is 0
DTC C1225 LF Excessive Wheel Speed Variation
DTC C1226 RF Excessive Wheel Speed Variation
DTC C1227 LR Excessive Wheel Speed Variation
DTC C1228 RR Excessive Wheel Speed Variation
DTC C1232 LF Wheel Speed Circuit Open or Shorted
DTC C1233 RF Wheel Speed Circuit Open or Shorted
DTC C1234 LR Wheel Speed Circuit Open or Shorted
DTC C1235 RR Wheel Speed Circuit Open or Shorted
DTC C1236 Low System Supply Voltage
DTC C1237 High System Supply Voltage
DTC C1241 MAGNA STEER Circuit Malfunction
DTC C1241 Magnasteer Malfunction
DTC C1242 BPMV Pump Motor Ground Circuit Open
DTC C1243 BPMV Pump Motor Stalled
DTC C1245 Brake Sensor Pressure Always High
DTC C1247 Brake Pressure Differential Switch Activated
DTC C1255 EBTCM Internal Malfunction
DTC C1256 EBCM Internal Malfunction
DTC C1261 LF Inlet Valve Solenoid Malfunction
DTC C1262 LF Outlet Valve Solenoid Malfunction
DTC C1263 RF Inlet Valve Solenoid Malfunction
DTC C1264 RF Outlet Valve Solenoid Malfunction
DTC C1265 LR Inlet Valve Solenoid Malfunction
DTC C1266 LR Outlet Valve Solenoid Malfunction
DTC C1267 RR Inlet Valve Solenoid Malfunction
DTC C1268 RR Outlet Valve Solenoid Malfunction
DTC C1271 LF TCS Master Cylinder Isolation Valve Malfunction
DTC C1272 LF TCS Valve Solenoid Malfunction
DTC C1273 RF TCS Master Cylinder Isolation Valve Malfunction
DTC C1274 RF TCS Valve Solenoid Malfunction
DTC C1276 Delivered Torque Signal Circuit Malfunction
DTC C1277 Requested Torque Signal Circuit Malfunction
DTC C1278 TCS Temporarily Inhibited By PCM
DTC C1281 Steering Sensor Uncorrelated Malfunction
DTC C1282 Yaw Rate Sensor Bias Circuit Malfunction
DTC C1283 Excessive Time to Center Steering
DTC C1284 Lateral Accelerometer Sensor Self Test Malfunction
DTC C1285 Lateral Accelerometer Sensor Circuit Malfunction
DTC C1286 Steering Sensor Bias Malfunction
DTC C1286 Steering/Lateral Accelerometer Sensor Bias Malfunction
DTC C1287 Steering Sensor Rate Malfunction
DTC C1288 Steering Sensor Circuit Malfunction
DTC C1291 Open Brake Lamp Switch Contacts During Deceleration
DTC C1293 DTC C1291/C1292 Set in Current or Previous Ignition Cycle
DTC C1294 Brake Lamp Switch Circuit Always Active
DTC C1295 Brake Lamp Switch Circuit Open
DTC C1296 Master Cylinder Sensor Circuit Open or Shorted
DTC C2100 Left Front TPM Sensor Malfunction
DTC C2105 Right Front TPM Sensor Malfunction
DTC C2110 Right Rear TPM Sensor Malfunction
DTC C2115 Left Rear TPM Sensor Malfunction
DTC C2120 TPM System Malfunction
DTC C2121 TPM System Programming Malfunction
DTC P0101 Mass Air Flow (MAF) Sensor Performance
DTC P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency
DTC P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency
DTC P0107 Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage
DTC P0108 Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage
DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113 Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
DTC P0125 Engine Coolant Temperature (ECT) Insufficient for Closed Loop Fuel Control
DTC P0131 HO2S Circuit Low Voltage Bank 1 Sensor 1
DTC P0132 HO2S Circuit High Voltage Bank 1 Sensor 1
DTC P0133 HO2S Slow Response Bank 1 Sensor 1
DTC P0134 HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0135 HO2S Heater Performance Bank 1 Sensor 1
DTC P0137 HO2S Circuit Low Voltage Bank 1 Sensor 2
DTC P0138 HO2S Circuit High Voltage Bank 1 Sensor 2
DTC P0140 HO2S Circuit Insufficient Activity Bank 1 Sensor 2
DTC P0141 HO2S Heater Performance Bank 1 Sensor 2
DTC P0151 HO2S Circuit Low Voltage Bank 2 Sensor 1
DTC P0152 HO2S Circuit High Voltage Bank 2 Sensor 1
DTC P0153 HO2S Slow Response Bank 2 Sensor 1
DTC P0154 HO2S Circuit Insufficient Activity Bank 2 Sensor 1
DTC P0155 HO2S Heater Performance Bank 2 Sensor 1
DTC P0157 HO2S Circuit Low Voltage Bank 2 Sensor 2
DTC P0158 HO2S Circuit High Voltage Bank 2 Sensor 2
DTC P0160 HO2S Circuit Insufficient Activity Bank 2 Sensor 2
DTC P0161 HO2S Heater Performance Bank 2 Sensor 2
DTC P0171 Fuel Trim System Lean Bank 1
DTC P0172 Fuel Trim System Rich Bank 1
DTC P0174 Fuel Trim System Lean Bank 2
DTC P0175 Fuel Trim System Rich Bank 2
DTC P0200 Injector Control Circuit
DTC P0218 Transmission Fluid Overtemperature
DTC P0230 Fuel Pump Relay Control Circuit
DTC P0300 Engine Misfire Detected
DTC P0325 Knock Sensor Module Performance
DTC P0327 Knock Sensor (KS) 1 Circuit
DTC P0332 Knock Sensor (KS) 2 Circuit
DTC P0335 Crankshaft Position (CKP) Sensor Circuit
DTC P0336 Crankshaft Position (CKP) Sensor Performance
DTC P0341 Camshaft Position (CMP) Sensor Performance
DTC P0342 Camshaft Position (CMP) Sensor Circuit Low Voltage
DTC P0343 Camshaft Position (CMP) Sensor Circuit High Voltage
DTC P0351 Ignition Coil 1 Control Circuit
DTC P0352 Ignition Coil 2 Control Circuit
DTC P0353 Ignition Coil 3 Control Circuit
DTC P0354 Ignition Coil 4 Control Circuit
DTC P0355 Ignition Coil 5 Control Circuit
DTC P0356 Ignition Coil 6 Control Circuit
DTC P0357 Ignition Coil 7 Control Circuit
DTC P0358 Ignition Coil 8 Control Circuit
DTC P0410 Secondary Air Injection (AIR) System
DTC P0412 Secondary Air Injection (AIR) Solenoid Control Circuit
DTC P0418 Secondary Air Injection (AIR) Pump Relay Control Circuit
DTC P0420 Catalyst System Low Efficiency Bank 1
DTC P0430 Catalyst System Low Efficiency Bank 2
DTC P0440 Evaporative Emission (EVAP) System
DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected
DTC P0443 Evaporative Emission (EVAP) Purge Solenoid Control Circuit
DTC P0446 Evaporative Emission (EVAP) Vent System Performance
DTC P0449 Evaporative Emission (EVAP) Vent Solenoid Control Circuit
DTC P0452 Fuel Tank Pressure Sensor Circuit Low Voltage
DTC P0453 Fuel Tank Pressure Sensor Circuit High Voltage
DTC P0461 Fuel Level Sensor Performance
DTC P0462 Fuel Level Sensor Circuit Low Voltage
DTC P0463 Fuel Level Sensor Circuit High Voltage
DTC P0480 Cooling Fan Relay 1 Control Circuit
DTC P0481 Cooling Fan Relay 2 and 3 Control Circuit
DTC P0500 Vehicle Speed Sensor (VSS) Circuit
DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Input
DTC P0503 Vehicle Speed Sensor (VSS) Circuit Intermittent
DTC P0506 Idle Speed Low
DTC P0507 Idle Speed High
DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage
DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage
DTC P0530 Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit
DTC P0562 System Voltage Low
DTC P0563 System Voltage High
DTC P0567 Cruise Control Resume Switch Circuit
DTC P0568 Cruise Control Set Switch Circuit
DTC P0571 Cruise Control Brake Switch Circuit
DTC P0601 Control Module Read Only Memory (ROM)
DTC P0602 Control Module Not Programmed
DTC P0604 Control Module Random Access Memory (RAM)
DTC P0606 Control Module Internal Performance
DTC P0608 Vehicle Speed Output Circuit
DTC P0645 Air Conditioning (A/C) Clutch Relay Control Circuit
DTC P0650 Malfunction Indicator Lamp (MIL) Control Circuit
DTC P0654 Engine Speed Output Circuit
DTC P0704 Clutch Switch Circuit
DTC P0705 Trans Range Switch Circuit
DTC P0706 Trans Range Switch Performance
DTC P0711 TFT Sensor Circuit Range/Performance
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
DTC P0719 Brake Switch Circuit Low Input
DTC P0724 Brake Switch Circuit High Input
DTC P0740 TCC Enable Solenoid Circuit Electrical
DTC P0742 TCC System Stuck On
DTC P0748 Pressure Control Solenoid Circuit Electrical
DTC P0751 1-2 Shift Solenoid Valve Performance
DTC P0753 1-2 Shift Solenoid Circuit Electrical
DTC P0756 2-3 Shift Solenoid Valve Performance
DTC P0758 2-3 Shift Solenoid Circuit Electrical
DTC P0785 3-2 Shift Solenoid Circuit Electrical
DTC P0801 Reverse Inhibit Solenoid Control Circuit
DTC P0803 Skip Shift Solenoid Control Circuit
DTC P0804 Skip Shift Lamp Control Circuit
DTC P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
DTC P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage
DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage
DTC P1120 Throttle Position (TP) Sensor 1 Circuit
DTC P1125 Accelerator Pedal Position (APP) System
DTC P1133 HO2S Insufficient Switching Bank 1 Sensor 1
DTC P1134 HO2S Transition Time Ratio Bank 1 Sensor 1
DTC P1153 HO2S Insufficient Switching Bank 2 Sensor 1
DTC P1154 HO2S Transition Time Ratio Bank 2 Sensor 1
DTC P1220 Throttle Position (TP) Sensor 2 Circuit
DTC P1221 Throttle Position (TP) Sensor 1- 2 Correlation
DTC P1258 Engine Coolant Overtemperature - Protection Mode Active
DTC P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit
DTC P1276 Accelerator Pedal Position (APP) Sensor 1 Performance
DTC P1280 Accelerator Pedal Position (APP) Sensor 2 Circuit
DTC P1281 Accelerator Pedal Position (APP) Sensor 2 Performance
DTC P1285 Accelerator Pedal Position (APP) Sensor 3 Circuit
DTC P1286 Accelerator Pedal Position (APP) Sensor 3 Performance
DTC P1380 Misfire Detected - Rough Road Data Not Available
DTC P1381 Misfire Detected - No Communication with Brake Control Module
DTC P1415 Secondary Air Injection (AIR) System Bank 1
DTC P1416 Secondary Air Injection (AIR) System Bank 2
DTC P1431 Fuel Level Sensor 2 Performance
DTC P1432 Fuel Level Sensor 2 Circuit Low Voltage
DTC P1433 Fuel Level Sensor 2 Circuit High Voltage
DTC P1441 Evaporative Emission (EVAP) System Flow During Non-Purge
DTC P1514 Throttle Body Performance
DTC P1515 Control Module Throttle Actuator Position Performance
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
DTC P1517 Throttle Actuator Control (TAC) Module Performance
DTC P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit
DTC P1539 Air Conditioning (A/C) Clutch Feedback Circuit High Voltage
DTC P1546 Air Conditioning (A/C) Clutch Feedback Circuit Low Voltage
DTC P1571 Traction Control Torque Request Circuit
DTC P1574 Stoplamp Switch Circuit
DTC P1575 Extended Travel Brake Switch Circuit
DTC P1626 Theft Deterrent Fuel Enable Signal Lost
DTC P1630 Theft Deterrent Learn Mode Active
DTC P1631 Theft Deterrent Start Enable Signal Not Correct
DTC P1635 5 Volt Reference 1 Circuit
DTC P1637 Generator L-Terminal Circuit
DTC P1638 Generator F-Terminal Circuit
DTC P1639 5 Volt Reference 2 Circuit
DTC P1652 Powertrain Induced Chassis Pitch Output Circuit
DTC P1689 Traction Control Delivered Torque Output Circuit
DTC P1810 TFP Valve Position Switch Circuit
DTC P1860 TCC PWM Solenoid Circuit Electrical
DTC P1870 Transmission Component Slipping
DTC Table
DTC U1000 and DTC U1255 Class 2 Communication Malfunction
DTC U1001-U1254 Lost Communication with XXX
DTC U1255 Serial Data Line Malfunction
DTC U1300 Class 2 Short to Ground
DTC U1301 Class 2 Short to Battery


2. Check for loose or corroded connectors on the Battery and LOAD TEST the Battery !
3. Try to reset the VATS system using the following procedure: The typical 1998+ Passkey relearn procedure is this:
1. Disable your headlamps. Attempt to start the vehicle. Vehicle may or may not 'fire' and quit. Some vehicles will not engage the starter. This is normal. DO NOT TURN OFF KEY YET !!

2. Leave the key in the "on" position, until the 'security' light goes out or quits alternately flashing between "Security" and "Battery". This relearn period always takes 10 minutes. How long does this take ? 10 minutes. How long do I have to wait ? 10 minutes.

3. After security light is no longer displayed, shut the key off ! Wait 5-10 seconds and repeat the above procedure (steps 1 through 3) another two completed times for a total of 3 start-relearn-attempts, remembering to shut the key off between each 10 minute relearn procedure. This will take 30 minutes--no less. If the 4th start attempt fails to start the vehicle you did one relearn step (or all of them incorrectly). If you left your headlamps on until the battery went dead and voltage dropped below 10.5 volts, no amount of relearn attempts will be learned !!
Don't read too much into this. Most people cannot seem to grasp the simplicity of this relearn procedure.

4. Check *the VATS pellet in the key. Try using your spare key to resolve the issue. If the car starts using the spare key then you want to try cleaning the pellet on the key causing the issue. You can do this by simply using Isopropyl Alcohol *on a damp cloth, followed by sliding the resistor back and forth between a piece of folded paper.
If the car continues to start using the spare key but does not start using the original key after cleaning you need to buy a new key !
Determine your VATS code ( A GM dealer should do this for no charge) or

If you have a digital volt meter, set it on ohms mode and measure the resistance of the pellet on your key. The BCM is programmed for a specific resistance value. The BCM measures the voltage drop across the key pellet. If it is within +/-10%, then the car will start.
The 15 resistor codes are:
Key# Value (Ohms)
1 392
2 523
3 681
4 887
5 1130
6 1470
7 1870
8 2370
9 3010
10 3740
11 4750
12 6040
13 7500
14 9530
15 11800

If you're getting 1460, you probably have a VATS code 6. You can set where the decimal point goes, but the point is the number is within +/- 10% of the value for #6.


Once you have this number...

Follow this link to buy a double sided GM VATS key.
One good source for the blank key is http://stores.ebay.com/Locksmith-Source The number key you want is your VATS code #

Once the key arrives Take it to a local locksmith. he should charge you $2.00 to cut it
5. Bad ignition switch. Try to *wiggle and pull on the key while holding it in the crank position, also try just holding the switch in the crank position for an extended period of time and see if it will start.
Instructions and photo's on accessing the Ignition switch assembly can be found HERE

6. Check Minifuse 14 (10 amp) and Maxifuse 52 (60 amp) in the pass toeboard fuse panel Located on the passenger side under the carpet, remove floor cover then fuse housing cover.
*

7. Check the Theft Deterent Relay *TDR relay which is GM part number# 12177233 or *located above the BCM in the same location. The easiest method to check this is to remove the relay and jump between the purple and red wires on the connector, If the car starts with a jumper in place you need a new relay !
This relay is located right above the BCM in the pass. side footwell. It has 4 wires attached to it:

Coil side:
Yellow - +12v from ignition switch during starting.
Yellow/black stripe - Ground signal supplied by BCM.
Note this will only show continuity to ground during starting (assuming no theft protection is occurring...the BCM has the ability to prevent starting by not supplying this ground signal).


Load side:
Red - +12v from battery
Purple - +12v to starter solenoid during starting.
*

8. Bad Clutch Safety Switch Just disconnect the clutch safety switch connector from the switch, use a small piece if wire and jumper the TWO connections in the plug. If the switch is bad, the jumper wire will allow the car to start! ***Remember*** if you jumper that switch out, the car will start IN GEAR with the clutch OUT!
*
9. Loose starter connections. VERY COMMON ISSUE!!! Loose wires on the starter and solenoid will cause this issue! If there loose, it will eventually cause the wire and solenoid to burn up! (get crispy) Then it will FAIL! Put the car on jack stands or a lift and check all the wires on the starter solenoid. Located on the Passenger Side Engine Compartment.



10. *Starter solenoid. If the TDR isn't bad, then the solenoid is probably bad If it fails to start and trying the ignition switch a few times doesn't work and you’re stuck, whack the starter with a hammer or a wrench. Quick check to rule out the starter and solenoid is to jump the terminals on the solenoid with a screw driver or remote starter button,(preferred method).
If the starter engages it's not the starter or solenoid.



11. Starter. If the brushes inside the starter are worn or the commentator ring is corroded or burnt, the same mechanical agitation described in # 10 will also alleviate that issue (temporarily)


12. *Check the Block Ground located directly above the starter Make sure you have two wires attached to that ground ,it is clean , corrosion free and tight.
*

Plasticfan

Great write up. Thanks for posting. Might want to include this in the DIY sticky at the top of C5 tech.

sbadd99

that was what I was looking for as I have the same problem, slight mod to that is the service manual says 11 minutes and wait time between is 30 seconds

I will run the procdure tonight, thanks

sbadd99

ran that procedure tonight, didn't work, will run again tomorrow

the security light did not go off during procedure, and I noted that the steering wheel was locked

P1631 is still the only code, battery now on charge for a re-run

sbadd99

99 vette.
couldn't get it to relearn, cleared codes via dic, still wont kick over, measured key resistance at 602 new replacemant key same resistance, didn't see that value listed anywhere ?

going to clean grounds etc will recheck for codes, load test battery even tho I have been using a jumper pack to keep charge up

BlackZ06

It is not so much whether it is 10 or 11 minutes .... what you are waiting for is the SECURITY telltale to turn OFF ... which takes about 10 to 11 minutes. Once the telltale is OFF you can turn the ignition OFF, wait at least 5 seconds, then turn the ignition to ON and then START .... that will once again illuminate the SECURITY telltale ... and after the 3rd 10 minute (approx) period, the next off ... wait 5 seconds then START should result in the password now being accepted and the engine to start.

Good luck,

BlackZ06

You have key #12 ... set your DMM to the lowest ohm setting and read it that way (usually has a 200 on it) ......

sbadd99

Thanks heaps on the Key code # 12, working through all the earth points, only have about 1 hour each afternoon to do so

sbadd99

Found my problem, I cleaned all the body earths even tho they were as shiny as, then I was checking connections under the dash, I didnt like the way the 2 White wire line from the front of the ignition was being routed so I changed it a couple of times, this was the only plug I pulled, it fired up and has been each time I try it, as I have the knee pad off, I intend to do the ignition strip and clean as posted by Bill Curlee, then I know everthing is clean
Thanks for the help as always, great site with gobs of great info

sbadd99

Just a update, been driving around today no problem, still had most of the under dash still out so I did the ignition strip and clean, the contacts were burnt, put it all back in, dosn't crank again, Vats bypass is the next job, stuff it had enough

LSCHMIDT

Has anyone else used a vats bypass? I'm considering this on my car as it has an intermittent no start issue.

sbadd99

its a pretty simple fix, check out thread "dam it car wont start" it has the diagram.

Its those 2 white wires coming off the front of the ignition

sbadd99

did the bypass last night, car starts no problem, cost 5 cents for the resistor

What the threads don't tell you is that you need a 1/4 watt resistor I used a 1/2 watt as it is a little beigger and easier to work with

dosn't get any cheaper than that

BlackZ06

Hey, if it fixed the problem, and cost you 5 cents .... I'd say that's a GREAT way to fix it .....

nightman06

I got the P1626 code earlier today. I cleared it and it hasnt yet come back. I am having these intermittent starting issues but I dont get a blinking "SECURITY" light when the key is in the "ON" position. Where does this leave me in terms of troubleshooting? Should I be bothering to jumper the relay above the BCM? Or check the ignition switch? just trying to narrow down the possibilities this issue is starting to become a real hassle. Thanks

sbadd99

just do a search on P1626 you will find plenty of info, do you have a spare, read the resistance on both, do a temp bypass, if that solves it than its the ignition

dogboy

I'm having the 1631 code issue now. I have to wait a few minutes with key in on position then turn off and than it usually starts or goes through the fuel pump shut off for a few tries than starts. I'm doing the relearn process now. If that fixes it can I assume its fixed or is it a temporay one?

sbadd99

you dont have to wait with key turned on, usually remove key for 3 minutes then try again.

Clean around the pellet, do you have a spare key, does it do the same, if you dont have one get one, if cleaning the key pellet dosn't help, your ignition may be the problem, mine did it a few times over a year, then I did the bypass

dogboy

I had it happen with both keys. How to do the bypass?

sbadd99

its really simple, I will post some pics on monday, can't edit pics on my home computer

Read the resistance of your key chip, go and buy a resistor too match for a few cents and I will come back in a couple of days with pics