Codes List
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,624
Likes: 18
From: Dover MA
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
Codes List
Sorry for the dupe, anyone got the link to the DIC codes list? Thanks.
Getting an intermittent P1652 in the PCM (10) category. Absolutely no functional problems at all. Annoying and puzzling.
Getting an intermittent P1652 in the PCM (10) category. Absolutely no functional problems at all. Annoying and puzzling.
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Looks like one or more of your electronic shocks is not responding to commanded controls.
From the service manual:
The PCM controls the Powertrain Induced Chassis Pitch by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. The driver has a fault line which is monitored by the PCM. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential should be high (near battery voltage). If the fault detection circuit senses a voltage other than what the system expects, the fault line status changes causing the DTC to set.
The PCM receives an ignition voltage feed from the Electronic Suspension Control module on the Powertrain Induced Chassis Pitch circuit. The PCM grounds this circuit when the vehicle accelerates rapidly or brakes hard. When the chassis pitch input circuit goes low (about 0 volts), the ESC module commands all four shock absorber solenoids to a firm position. The PCM calculates the chassis pitch information based on the engine torque and the vehicle braking force.
Conditions for Setting the DTC:
The PCM detects that the commanded state of the driver and the actual state of the control circuit do not match.
The condition must exist for a minimum of 5.0 seconds.
From the service manual:
The PCM controls the Powertrain Induced Chassis Pitch by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. The driver has a fault line which is monitored by the PCM. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential should be high (near battery voltage). If the fault detection circuit senses a voltage other than what the system expects, the fault line status changes causing the DTC to set.
The PCM receives an ignition voltage feed from the Electronic Suspension Control module on the Powertrain Induced Chassis Pitch circuit. The PCM grounds this circuit when the vehicle accelerates rapidly or brakes hard. When the chassis pitch input circuit goes low (about 0 volts), the ESC module commands all four shock absorber solenoids to a firm position. The PCM calculates the chassis pitch information based on the engine torque and the vehicle braking force.
Conditions for Setting the DTC:
The PCM detects that the commanded state of the driver and the actual state of the control circuit do not match.
The condition must exist for a minimum of 5.0 seconds.
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,624
Likes: 18
From: Dover MA
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
Wow! Thank-you-kind-sir-he-said. Actually I have that one, there was another one with an entire printout list of all the codes by category?
I can't swear to it, but every appearance of this thing would seem to roughly coincide with at least some degree of road imperfection encounter (of which we have a lot in New England, to say the least). Maybe there's a bad shock or...?
I can't swear to it, but every appearance of this thing would seem to roughly coincide with at least some degree of road imperfection encounter (of which we have a lot in New England, to say the least). Maybe there's a bad shock or...?
Race Director
Joined: Nov 2003
Posts: 12,346
Likes: 5
From: Mustang OK
Hey Brad! 
Here's a site that shows the DTCs specific to each model year:
Computer Codes for 1981 to 2003 Corvettes
Hope this helps.
Here's a site that shows the DTCs specific to each model year:
Computer Codes for 1981 to 2003 Corvettes
Hope this helps.
Last edited by GrayC5; Nov 30, 2004 at 01:10 AM.
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,624
Likes: 18
From: Dover MA
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
Originally Posted by 5 Liter Eater
Looks like one or more of your electronic shocks is not responding to commanded controls.
From the service manual:
The PCM controls the Powertrain Induced Chassis Pitch by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. The driver has a fault line which is monitored by the PCM. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential should be high (near battery voltage). If the fault detection circuit senses a voltage other than what the system expects, the fault line status changes causing the DTC to set.
The PCM receives an ignition voltage feed from the Electronic Suspension Control module on the Powertrain Induced Chassis Pitch circuit. The PCM grounds this circuit when the vehicle accelerates rapidly or brakes hard. When the chassis pitch input circuit goes low (about 0 volts), the ESC module commands all four shock absorber solenoids to a firm position. The PCM calculates the chassis pitch information based on the engine torque and the vehicle braking force.
Conditions for Setting the DTC:
The PCM detects that the commanded state of the driver and the actual state of the control circuit do not match.
The condition must exist for a minimum of 5.0 seconds.
From the service manual:
The PCM controls the Powertrain Induced Chassis Pitch by grounding the control circuit via an internal switch called a driver. The primary function of the driver is to supply the ground for the controlled component. The driver has a fault line which is monitored by the PCM. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential should be high (near battery voltage). If the fault detection circuit senses a voltage other than what the system expects, the fault line status changes causing the DTC to set.
The PCM receives an ignition voltage feed from the Electronic Suspension Control module on the Powertrain Induced Chassis Pitch circuit. The PCM grounds this circuit when the vehicle accelerates rapidly or brakes hard. When the chassis pitch input circuit goes low (about 0 volts), the ESC module commands all four shock absorber solenoids to a firm position. The PCM calculates the chassis pitch information based on the engine torque and the vehicle braking force.
Conditions for Setting the DTC:
The PCM detects that the commanded state of the driver and the actual state of the control circuit do not match.
The condition must exist for a minimum of 5.0 seconds.
One technical thought - I have the Z06 Motorsports wheels w/ Pilot Sports in Z06 sizes in place of ths stock wheels and tires. Each wheel/tire combo must weigh more than the original. Would this increase in unsprung weight account for the problem? It ran fine with this new setup for months, though...
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski