TCS/LDCM/RDCM codes
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
TCS/LDCM/RDCM codes
Sounds like I need to have the Steering Wheel Position sensor replaced? Do at home? Cost to have done?
Starting throwing TCS codes C1287/C1288 about every other day.
Checking the codes also pulled up:
LDCM: U1064, U1069, B2282, B2284, B2262, B2264
RDCM: B2283, B2285, U1064, U1096
Thoughts?
Starting throwing TCS codes C1287/C1288 about every other day.
Checking the codes also pulled up:
LDCM: U1064, U1069, B2282, B2284, B2262, B2264
RDCM: B2283, B2285, U1064, U1096
Thoughts?
Tech Contributor
Joined: Oct 1999
Posts: 41,032
Likes: 9,789
From: Charlotte, NC (formerly Endicott, NY)
The door codes are voltage level problems. The C codes tell you the voltage of the steering sensor is off. Maybe the C codes are due to an improper voltage supply to the sensor Vs a bad sensor. Check all voltage and ground connections and make sure something hasn't happened to the wiring in the door accordions.
Bill
Bill
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
All good advice; thank you.
I'll start tomorrow - I think there's a FAQ on the grounds here somewhere if I remember correctly.
I pretty much always get a charging fault indication if it sits for a few days.
No tire/wheel changes. Car was lowered and aligned ~3 months ago. Steering wheel appears visually centered.
'03 Z06, BTW. 74K miles, all stock.
I'll start tomorrow - I think there's a FAQ on the grounds here somewhere if I remember correctly.
I pretty much always get a charging fault indication if it sits for a few days.
No tire/wheel changes. Car was lowered and aligned ~3 months ago. Steering wheel appears visually centered.
'03 Z06, BTW. 74K miles, all stock.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Update - the battery was JUNK (original - I guess it was about time) and I changed it. I also cleaned the grounds as was noted elsewhere.
The codes persisted and I haven't had time to look deeper - and now I'm also throwing ABS codes
C1265, C1283, C1287, C1288). So the full list of current codes is:
28
C1265
C1283
C1287
C1288
A0
B2262
B2264
U1064
A1
U1064
Am I correct in thinking that this points pretty clearly to the SWPS? Otherwise, I'll get out the multimeter and the factory service manual and start learning about this stuff
The codes persisted and I haven't had time to look deeper - and now I'm also throwing ABS codes
C1265, C1283, C1287, C1288). So the full list of current codes is:28
C1265
C1283
C1287
C1288
A0
B2262
B2264
U1064
A1
U1064
Am I correct in thinking that this points pretty clearly to the SWPS? Otherwise, I'll get out the multimeter and the factory service manual and start learning about this stuff
Last edited by billla; Jan 5, 2012 at 02:24 PM.
Racer
Joined: Apr 2009
Posts: 488
Likes: 2
From: Myrtle Beach SC
For your A0 and A1 codes:
U1064 is Loss of Comms with BCM => could be something with the wiring in the accordion tube or related to a junk battery
B2262 is Horizontal Position Sensor Fault => left side-view mirror
B2264 is Vertical Position Sensor Fault => left side-view mirror; The DCM monitors the supply voltage to the mirror positioning motor and triggers a fault if the voltage level is out of range. One possibility is that the circuit was not provided the correct voltage (4.0-5.5 VDC) because of the battery.
For your 28 codes:
C1265: LR Inlet solenoid valve malfunction => can be triggered if the EBTCM senses an open, shprt to ground or short to voltage in the circuit
C1283: Excessive time to center steering => the description in the service manual is pretty long, but the "summary version" is that the EBTCM uses inputs from the Yaw Rate sensor, Lateral Accelorometer and Wheel Speed sensors to determine when to start the steering wheel centering routine. If there is a large offset between the yaw rate sensor and the lateral accelorometer, the EBTCM will believe that the steering is off-center, and trigger the code after driving at 25mph+ for 10 minutes.
C1287: Steering sensor rate malfunction => do you have active handling (RPO JL4)?
C1288: Steering sensor circuit malfuntion => triggered when SWPS voltage falls outside the range 0.2-4.8 VDC
It seems to me that the battery might be a common factor amongst all the codes. If you aren't already aware of this, the C5 is very finicky about battery voltage. Now that you have replaced the battery, I would advise that you clear the codes and see which ones come back. Make sure your battery stays fully charged. A battery tender might not be a bad idea either. I use the CTEK Multi US 3300 model, and have had no battery/voltage issues since installing it.
Clear the codes, drive the car, check for codes and post up what you find.
Hope this helps.
U1064 is Loss of Comms with BCM => could be something with the wiring in the accordion tube or related to a junk battery
B2262 is Horizontal Position Sensor Fault => left side-view mirror
B2264 is Vertical Position Sensor Fault => left side-view mirror; The DCM monitors the supply voltage to the mirror positioning motor and triggers a fault if the voltage level is out of range. One possibility is that the circuit was not provided the correct voltage (4.0-5.5 VDC) because of the battery.
For your 28 codes:
C1265: LR Inlet solenoid valve malfunction => can be triggered if the EBTCM senses an open, shprt to ground or short to voltage in the circuit
C1283: Excessive time to center steering => the description in the service manual is pretty long, but the "summary version" is that the EBTCM uses inputs from the Yaw Rate sensor, Lateral Accelorometer and Wheel Speed sensors to determine when to start the steering wheel centering routine. If there is a large offset between the yaw rate sensor and the lateral accelorometer, the EBTCM will believe that the steering is off-center, and trigger the code after driving at 25mph+ for 10 minutes.
C1287: Steering sensor rate malfunction => do you have active handling (RPO JL4)?
C1288: Steering sensor circuit malfuntion => triggered when SWPS voltage falls outside the range 0.2-4.8 VDC
It seems to me that the battery might be a common factor amongst all the codes. If you aren't already aware of this, the C5 is very finicky about battery voltage. Now that you have replaced the battery, I would advise that you clear the codes and see which ones come back. Make sure your battery stays fully charged. A battery tender might not be a bad idea either. I use the CTEK Multi US 3300 model, and have had no battery/voltage issues since installing it.
Clear the codes, drive the car, check for codes and post up what you find.
Hope this helps.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I have a SWPS waiting to go in but it's not an easy job as you have to pull the steering coumn.
Check post #35
http://forums.corvetteforum.com/c5-t...-sensor-2.html
Last edited by DeeGee; Jan 6, 2012 at 03:33 AM.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
OK, cleared the codes today and now have just the following. Note that these come on immediately at start, every time.
28
C1265 H
C1287 H
C1288 H
28
C1265 H
C1287 H
C1288 H
Last edited by billla; Jan 6, 2012 at 03:21 PM.
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Racer
Joined: Apr 2009
Posts: 488
Likes: 2
From: Myrtle Beach SC
Did any of those three codes come back as "current" during the last drive cycle?
Also - do you have active handling RPO JL4? There 2 different diagnostic procedures for C1287, depending on JL4 or no JL4.
Also - do you have active handling RPO JL4? There 2 different diagnostic procedures for C1287, depending on JL4 or no JL4.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
I don't have active handling. I do have the FSMs...I figure I should probably run through the process this weekend if for no other reason than to learn to do it. I am not...an electronics guy, being fairly used to accidently letting the smoke out when I work with them. They appear not to work afterwards. Go figure.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Likely Steering wheel position sensor failure,
Before you replace it insure that the car is properly aligned and the when going down a straight and flat road that the wheel is centered. Both can cause issues like you are experiencing if the alignment is off and/or the wheel is not centered.
Before you replace it insure that the car is properly aligned and the when going down a straight and flat road that the wheel is centered. Both can cause issues like you are experiencing if the alignment is off and/or the wheel is not centered.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
If your car is an 03 as your profile indicates you DO have AH. It is standard equipment on all C5's beginning in 2001. It was an option that began mid model year 1998 and continued as an option through the 2000 model year until it became standard equiment starting in 2001. When it was an option it had RPO identifier JL4.
http://www.corvettemuseum.org/specs/2001/features.htm
http://www.corvettemuseum.org/specs/2001/features.htm
Sorry; honestly not all that famliar with C5 options, shamefully
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Update (finally). I replaced the SWPS today; took me about 5 hours but I was working very slowly and carefully...and I'm old and inflexible All the codes are clear.
I started getting C1214 about 3 months ago, so off to ABSFIXER my ECBM goes.
Would be nice if that's it for a while
All the codes are clear.I started getting C1214 about 3 months ago, so off to ABSFIXER my ECBM goes.
Would be nice if that's it for a while
Last edited by billla; Sep 3, 2012 at 08:22 PM.
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Recieved the EBCM back from ABSFIXER and installed - now I'm getting C1265. I'm checking in with Brandon as well, but thought I'd check in here.
From review of the manual and some online sources, this seems to be be in the same function that the surge protection "upgrade" is applied...? Did anyone else pop for this upgrade? Any issues?
Any thoughts on things to check while I'm waiting on a response?
From review of the manual and some online sources, this seems to be be in the same function that the surge protection "upgrade" is applied...? Did anyone else pop for this upgrade? Any issues?
Any thoughts on things to check while I'm waiting on a response?
Thread Starter
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
I thought I'd close this out with the final resolution - I am "code free"!
ABSFIXER found two burnt coils in my EBCM and repaired them for $150. I appreciate his willingness to look at it again and do a quick turnaround.
THANKS to everyone that provided information and guidance to get this resolved!
ABSFIXER found two burnt coils in my EBCM and repaired them for $150. I appreciate his willingness to look at it again and do a quick turnaround.
THANKS to everyone that provided information and guidance to get this resolved!
Racer
Joined: Oct 2014
Posts: 292
Likes: 12
From: miami fl
For your A0 and A1 codes:
U1064 is Loss of Comms with BCM => could be something with the wiring in the accordion tube or related to a junk battery
B2262 is Horizontal Position Sensor Fault => left side-view mirror
B2264 is Vertical Position Sensor Fault => left side-view mirror; The DCM monitors the supply voltage to the mirror positioning motor and triggers a fault if the voltage level is out of range. One possibility is that the circuit was not provided the correct voltage (4.0-5.5 VDC) because of the battery.
For your 28 codes:
C1265: LR Inlet solenoid valve malfunction => can be triggered if the EBTCM senses an open, shprt to ground or short to voltage in the circuit
C1283: Excessive time to center steering => the description in the service manual is pretty long, but the "summary version" is that the EBTCM uses inputs from the Yaw Rate sensor, Lateral Accelorometer and Wheel Speed sensors to determine when to start the steering wheel centering routine. If there is a large offset between the yaw rate sensor and the lateral accelorometer, the EBTCM will believe that the steering is off-center, and trigger the code after driving at 25mph+ for 10 minutes.
C1287: Steering sensor rate malfunction => do you have active handling (RPO JL4)?
C1288: Steering sensor circuit malfuntion => triggered when SWPS voltage falls outside the range 0.2-4.8 VDC
It seems to me that the battery might be a common factor amongst all the codes. If you aren't already aware of this, the C5 is very finicky about battery voltage. Now that you have replaced the battery, I would advise that you clear the codes and see which ones come back. Make sure your battery stays fully charged. A battery tender might not be a bad idea either. I use the CTEK Multi US 3300 model, and have had no battery/voltage issues since installing it.
Clear the codes, drive the car, check for codes and post up what you find.
Hope this helps.
U1064 is Loss of Comms with BCM => could be something with the wiring in the accordion tube or related to a junk battery
B2262 is Horizontal Position Sensor Fault => left side-view mirror
B2264 is Vertical Position Sensor Fault => left side-view mirror; The DCM monitors the supply voltage to the mirror positioning motor and triggers a fault if the voltage level is out of range. One possibility is that the circuit was not provided the correct voltage (4.0-5.5 VDC) because of the battery.
For your 28 codes:
C1265: LR Inlet solenoid valve malfunction => can be triggered if the EBTCM senses an open, shprt to ground or short to voltage in the circuit
C1283: Excessive time to center steering => the description in the service manual is pretty long, but the "summary version" is that the EBTCM uses inputs from the Yaw Rate sensor, Lateral Accelorometer and Wheel Speed sensors to determine when to start the steering wheel centering routine. If there is a large offset between the yaw rate sensor and the lateral accelorometer, the EBTCM will believe that the steering is off-center, and trigger the code after driving at 25mph+ for 10 minutes.
C1287: Steering sensor rate malfunction => do you have active handling (RPO JL4)?
C1288: Steering sensor circuit malfuntion => triggered when SWPS voltage falls outside the range 0.2-4.8 VDC
It seems to me that the battery might be a common factor amongst all the codes. If you aren't already aware of this, the C5 is very finicky about battery voltage. Now that you have replaced the battery, I would advise that you clear the codes and see which ones come back. Make sure your battery stays fully charged. A battery tender might not be a bad idea either. I use the CTEK Multi US 3300 model, and have had no battery/voltage issues since installing it.
Clear the codes, drive the car, check for codes and post up what you find.
Hope this helps.
