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• When Monitored: • Set Condition: Possible Causes WIRING HARNESS, TERMINAL, CONNECTOR DAMAGE (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE, SHORTED TO GROUND, OR (B3) LEFT REAR WSS SIGNAL CIRCUIT SHORTED TO VOLTAGE, SHORTED TO GROUND, OR OPEN (B3) LEFT REAR WSS SIGNAL CIRCUIT SHORTED TO (B4) LEFT REAR WSS 12 VOLT SUPPLY CIRCUIT LEFT REAR WSS ANTI-LOCK BRAKES MODULE Diagnostic Test 1. VERIFY DTC IS ACTIVE Turn the ignition on. With the scan tool, record and erase ABS DTCs. Cycle the ignition switch. With the scan tool, read ABS DTCs. Does the scan tool display: C1020–LEFT REAR WHEEL SPEED SENSOR CIRCUIT? Yes >> Go To 2 No >> Perform the ABS Intermittent Condition diagnostic procedure in this Section. Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE). 2. INSPECT CONNECTORS & TERMINALS FOR DAMAGE Turn the ignition off. Inspect the Anti-Lock Brakes Module harness connector, Left Rear WSS harness connector, and Left Rear WSS Are any of the connectors or terminals damaged? Yes >> Repair as necessary. Perform ABS VERIFICATION TEST - VER 1. (Refer to 5 - BRAKES - STANDARD PROCEDURE). No >> Go To 3 5 - 80 BRAKES - ABS ELECTRICAL DIAGNOSTICS KJ |