Source: Corvette ABS/ASR Operation and Diagnosis, STG Manual 13003.02-1
Page: 4-5, 4-6
Copyright: 1991, General Motors Corporation
| Code | Description | Disable |
|---|---|---|
| 21 | RF Wheel Speed Sensor Fault | ABS/ASR |
| 23 | RF Wheel Speed Sensor Continuity Fault | ABS/ASR |
| 25 | LF Wheel Speed Sensor Fault | ABS/ASR |
| 27 | LF Wheel Speed Sensor Continuity Fault | ABS/ASR |
| 28 | Wheel Speed Sensor Frequency Error | ABS/ASR |
| 31 | RR Wheel Speed Sensor Fault | ABS/ASR |
| 23 | RR Wheel Speed Sensor Continuity Fault | ABS/ASR |
| 35 | LR Wheel Speed Sensor Fault | ABS/ASR |
| 37 | RF Wheel Speed Sensor Continuity Fault | ABS/ASR |
| 41 | RF Value Solenoid Fault | ABS/ASR |
| 44 | Pilot Valve Solenoid Fault | ABS/ASR |
| 45 | LF Valve Solenoid Fault | ABS/ASR |
| 51 | RR Valve Solenoid Fault | ABS/ASR |
| 55 | LR Valve Solenoid Fault | ABS/ASR |
| 57 | Cruise Control Ootput Monitoring Fault | ASR |
| 58 | EBCM Internal Adjuster Assembly Fault | ASR |
| 61 | Pump Motor or Pump Motor Relay Fault | ABS/ASR |
| 62 | Tach Pulses Fault | ASR |
| 63 | Valve Solenoid Relay Circuit Fault | ABS/ASR |
| 64 | Throttle Position Signal Fault | ASR |
| 65 | Adjuster Assembly Fault | ASR |
| 66 | Adjuster Assembly Control Fault | ASR |
| 71 | EBCM Internal Fault | ABS/ASR |
| 72 | Serial Data Link Fault | ASR |
| 73 | Spark Retard Monitoring Fault | ASR |
| 74 | Low Voltage | ABS/ASR |
| 75 | Lateral Accelerometer Wiring Fault | ABS/ASR |
| 76 | Lateral Accelerometer Signal Out of Range | ASR |
| 83 | Brake Fluid Level Low | ABS/ASR |
*EBCM: Electronic Brake Control Module
| Desription | Code Number(s) | Parameters |
|---|---|---|
| Speed Sensor Faults | 21, 25, 31, 35 | Circuit or sensor problem with ignition "ON" and vehicle in motion. |
| Speed Sensor Frequency Fault | 28 | Error as above, but individual sensor or circuit not identified. |
| Speed Sensor Continuity Faults | 23, 27, 33, 37 | Circuit or sensor problem with ignition "ON" and vehicle at rest. |
| Valve Solenoid Faults | 41, 45, 51, 55 | Solenoid position not as commanded. |
| Pilot Valve Solenoid Faults | 44 | Solenoid position not as commanded. |
| Cruise Control Output Monitoring Fault | 57 | Cruise control cutoff relay not as commanded. |
| EBCM Internal Adjuster Assembly Fault | 58 | Loss of microprocessor communication inside EBCM. |
| Pump Motor or Pump Motor Relay Fault | 61 | Voltage at relay without EBCM command or voltage not at relay within 60 milliseconds of command.. |
| Tach Pulses Fault | 62 | Engine RPM input lost. |
| Valve Solenoid Relay Circuit Fault | 63 | Voltage at relay not correct as commanded. |
| Throttle Position Signal Fault | 64 | TPS signal not present or out of range. |
| Adjuster Assembly Fault | 65 | Circuits to motor open or shorted. |
| Adjuster Assembly Control Fault | 66 | Current at motor too high (over 16 amps for 3 seconds) before reaching commanded position. |
| EBCM Internal Fault | 71 | Internal problem detected in self-testing. |
| Serial Data Link Fault | 72 | 3 consecutive data link transmission errors. |
| Spark Retard Monitoring Fault | 73 | Open or short in ignition retard request circuit to ECM. |
| Low Voltage | 74 | EBCM power input below 9.0 volts. |
| Lateral Accelerometer Wiring Fault | 75 | Open or short on any of the lateral accelerometer circuits. |
| Lateral Accelerometer signal Out of Range | 76 | Rating greater than 0.6g for an extended period of time. |
| Brake Fluid Level Low | 83 | Fluid level sensor or circuit indicates low fluid. |
Article ID: 635
Created: July 30, 2014
Last Updated: July 30, 2014
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1992-1996-corvette-abs-asr-fault-codes-and-parameters-635.html