Home/Chevrolet/Camaro/Chevrolet Camaro IV (1992-1998)/Repair manual/Anti-Lock Brake System/Circuit Description (Code 42)

Contents

Wiring diagrams Section: Anti-Lock Brake System

DESCRIPTION

BLEEDING BRAKE SYSTEM

Brake Control Assembly

Brake Cylinder/Caliper

DIAGNOSIS

Amber ANTI-LOCK Or ABS INOP Warning Light

Amber LOW TRAC Warning Light

Red BRAKE Warning Light

PRE-DIAGNOSTIC INSPECTION

USING TECH 1

Selecting Model Year

Selecting Vehicle

Selecting Test Mode

ENHANCED DIAGNOSTICS

Tech 1

Ignition Cycle Default

TERMINAL IDENTIFICATION

DIAGNOSTIC TROUBLE CODES

SYMPTOM DIAGNOSIS

INTERMITTENTS & POOR CONNECTIONS

DIAGNOSTIC SYSTEM CHECK

Diagnostic Aids

CHART A - (W/O TCS) ABS AMBER WARNING LIGHT ON OR OFF CONSTANTLY, NO CODES STORED

CHART B - (W/TCS) ABS AMBER WARNING LIGHT ON INTERMITTENTLY, NO CODES STORED

CHART B - (W/O TCS) ABS AMBER WARNING LIGHT OFF INTERMITTENTLY, NO CODES STORED

CHART C - (W/TCS) ABS/TCS WARNING LIGHT OFF, NO CODES STORED

CHART C - (W/O TCS) LOW TRACTION LIGHT ON WITH IGNITION OFF, NO CODES STORED

CODE 11 - ABS WARNING LIGHT CIRCUIT MALFUNCTION

CODE 14 - ABS ENABLE RELAY CONTACT CIRCUIT OPEN

CODE 15 - ABS ENABLE RELAY CONTACTS SHORTED TO BATTERY OR ALWAYS CLOSED

CODE 16 - ABS ENABLE RELAY COIL CIRCUIT OPEN

CODE 17 - ABS ENABLE RELAY COIL CIRCUIT SHORTED TO GROUND

CODE 18 - ABS ENABLE RELAY COIL CIRCUIT SHORTED TO BATTERY VOLTAGE

CODE 21/22 - FRONT WHEEL SPEED IS ZERO

CODE 23/24 - REAR WHEEL SPEED IS ZERO

CODE 25/26/27/28 - EXCESSIVE WHEEL SPEED VARIATION

CODE 32/33/34/35 - WHEEL SPEED SENSOR CIRCUIT OPEN OR SHORTED TO BATTERY OR GROUND

CODE 36 - LOW SYSTEM VOLTAGE

CODE 37 - HIGH SYSTEM VOLTAGE

CODE 38/41/42 - EMB/ESB WILL NOT HOLD MOTOR

Circuit Description (Codes 38 & 41)

DTC Will Set When (Codes 38 & 41)

Action Taken (Codes 38 & 41)

Circuit Description (Code 42)

DTC Will Set When (Code 42)

Action Taken (Code 42)

DTC Test Step Description

CODE 44/45/46 - CHANNEL (MOTOR) WILL NOT MOVE

CODE 47/48/51 - ABS MOTOR FREE SPINS

CODE 52/53 - LEFT/RIGHT FRONT CHANNEL (MOTOR) RELEASED TOO LONG

CODE 54 - REAR CHANNEL RELEASE TOO LONG

CODE 55 - EBCM/EBTCM MALFUNCTION

CODE 56/61/64 - ABS MOTOR CIRCUIT OPEN

CODE 57/62/65 - ABS MOTOR CIRCUIT SHORTED TO GROUND

CODE 58/63/66 - ABS MOTOR CIRCUIT SHORTED TO BATTERY OR MOTOR SHORTED

CODE 75 - (WITH TCS) PCM-TO-EBTCM SERIAL DATA MALFUNCTION

CODE 76/78 - FRONT SOLENOID CIRCUIT OPEN OR SHORTED TO BATTERY

CODE 77/81 - FRONT SOLENOID CIRCUIT SHORTED TO GROUND

CODE 82 - CALIBRATION MALFUNCTION

CODE 86 - EBCM TURNED ON RED BRAKE WARNING LIGHT

CODE 87 - RED BRAKE WARNING LIGHT CIRCUIT OPEN

CODE 88 - RED BRAKE WARNING LIGHT CIRCUIT SHORTED TO BATTERY

CODE 91/92 - OPEN BRAKE SWITCH CONTACTS DURING DECELERATION OR WHEN ABS IS REQUIRED

CODE 93 - CODE 91 OR 92 SET IN CURRENT OR LAST IGNITION CYCLE

CODE 94 - BRAKE SWITCH CONTACTS ALWAYS CLOSED

CODE 95 - BRAKE SWITCH CIRCUIT OPEN

CODE 96 - BRAKELIGHT CIRCUIT OPEN

CODE 111 - TCS WARNING OR SWITCH LIGHT CIRCUIT MALFUNCTION

CODE 114 - TCS ENABLE RELAY CONTACT CIRCUIT OPEN

CODE 116 - TCS ENABLE RELAY COIL CIRCUIT OPEN

CODE 118 - TCS ENABLE RELAY COIL CIRCUIT SHORTED TO BATTERY

CODE 123 - PCM-TO-EBTCM DELIVERED TORQUE CIRCUIT MALFUNCTION

CODE 136 - TCS LOW SYSTEM VOLTAGE

CODE 144/145 - REAR TCS CHANNEL WILL NOT MOVE

CODE 146 - ADJUSTER ASSEMBLY WILL NOT MOVE

CODE 147/148 - REAR TCS MOTOR FREE SPINS

CODE 154 - ADJUSTER ASSEMBLY MALFUNCTION

CODE 155 - EBTCM MALFUNCTION

CODE 156/161 - TCS MOTOR CIRCUIT OPEN

CODE 157/162 - TCS MOTOR CIRCUIT SHORTED TO GROUND

CODE 158/163 - TCS MOTOR CIRCUIT SHORTED TO BATTERY

CODE 164 - ADJUSTER ASSEMBLY MOTOR CIRCUIT OPEN

CODE 165 - ADJUSTER ASSEMBLY MOTOR CIRCUIT SHORTED TO GROUND

CODE 166 - ADJUSTER ASSEMBLY MOTOR CIRCUIT SHORTED TO BATTERY

REMOVAL & INSTALLATION

Removal

Installation

WHEEL SPEED SENSOR - FRONT

WHEEL SPEED SENSOR - REAR

WHEEL SPEED SENSORS

Front Wheel Speed Sensor

Rear Wheel Speed Sensor

All sections

Circuit Description (Code 42) Chevrolet Camaro IV

Anti-Lock Brake System

Circuit Description (Code 42)

This DTC is designed to detect a slipping rear ESB. During initialization and braking, the rear motor is re-homed. If the ESB slips, the motor/piston will move. During the next key "ON" initialization, a re-home of the motor verifies the motor/piston remained at the home position. If motor movement is detected, the ESB must be slipping.