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Home › Chevrolet › 1993 › Corvette Base, 2D Convertible, Standard › Repair and Diagnosis › Brakes › Traction Control › Anti-Lock Brake System & ASR - BOSCH 2S Micro › Diagnosis › Central Control Module Diagnostics › Ignition Cycle Default

Ignition Cycle Default

Fault codes will be erased after 50 code free ignition cycles. EBTCM ignition cycle counter will reset to zero.

ABS/ASR FAULT CODES

Fault Code(1) Description
21 RF Wheel Speed Sensor
23 RF Wheel Speed Sensor Continuity
25 LF Wheel Speed Sensor
27 LF Wheel Speed Sensor Continuity
28 Wheel Speed Sensor Frequency Error
31 RR Wheel Speed Sensor
33 RR Wheel Speed Sensor Continuity
35 LR Wheel Speed Sensor
37 LR Wheel Speed Sensor Continuity
41 RF Valve Solenoid
44 Pilot Valve Solenoid
45 LF Valve Solenoid
51 RR Valve Solenoid
55 LR Valve Solenoid
57 Cruise Control Output Monitoring
58 EBTCM Internal Adjuster Assembly
61 Pump Motor Or Pump Motor Relay
62 Tachometer Pulses
63 Valve Solenoid Relay Circuit
64(2) Throttle Position Signal
65 Adjuster Assembly
66 Adjuster Assembly Control
71 EBTCM Internal Fault
72 Serial Data Link
73 Spark Retard Monitoring
74 Low Voltage
75 Lateral Accelerometer Wiring
76 Lateral Accelerometer Signal Out Of Range
83 Brake Fluid Level Low
(1) EBTCM can only store up to 3 fault codes at a time.
(2) There are 2 separate diagnostic charts for TPS diagnosis: VIN J (LT1) and VIN P (LT5). Ensure correct chart is used.
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