1000 - 1999: 1123

1123 - LEFT REAR WHEEL SPEED SENSOR LONG GAP





When Monitored and Set Condition

- When Monitored: The Controller Antilock Brake (CAB) monitors the wheel speed circuit every 7 milliseconds (ms).
- Set Condition: The Controller Antilock Brake (CAB) will set this DTC if the speed signal is missing or there is excessive time between signals.





For a complete Antilock Brake System (ABS) Circuit Diagram Brakes - ABS Electrical Diagnostics.

1. VISUALLY INSPECT COMPONENTS FOR DAMAGE AND CORRECT INSTALLATION
Visually inspect the related wiring harness and connectors. Look for any chafed, pierced, pinched, or partially broken wires. Look for broken, bent, pushed out, or corroded terminals.
Visually inspect the Left Rear Wheel Speed Sensor, connector and tone wheel for damage and correct installation.
Are there any visible Sensor, connector or tone wheel concerns?

Yes

- Correct the sensor, connector or tone wheel concerns as necessary.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go to 2

2. MONITOR ALL WHEEL SPEED SENSORS WITH THE SCAN TOOL
With the scan tool, erase DTCs.
Start the engine.
With an assistant to drive, use the scan tool to monitor all wheel speed sensors. Slowly accelerate as straight as possible from a stop to 24 km/h (15 MPH).
Is the Left Rear Wheel Speed Sensor Signal 0 or differing from others by more than 5 km/h (3 MPH)?

Yes

- Replace the Left Rear Wheel Speed Sensor. Front Wheel Speed Sensor - Removal.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Inspect and repair the related wiring harness for a possible intermittent condition.
- Perform ABS VERIFICATION TEST. ABS Verification Test