C

NOTE: This procedure is used to diagnose DTC's C1175, C1178, C1222 LH REAR sensor & circuit.


C1- CHECK LH REAR WHEEL BEARING
- Check rear wheel bearing end play.
- Inspect LH rear brake anti-lock sensor indicator visually for damaged teeth.
- Were loose or damaged parts found?
YES - Replace damaged/worn parts. Restore vehicle. Retest system.
No - Go to C2.

C2- CHECK LH REAR ABS SENSOR
- Turn ignition switch to "OFF".
- Disconnect connector C1057 from ABS Control Module.
- Connect breakout box and adapter to harness connector C1057.
- Measure resistance between breakout box Pin 17, Circuit 518 (LG/R) and Pin 18, Circuit 519 (LG/BK).
- Is resistance between 1280 and 1920 ohms?
YES - Go to C4.
No - Go to C3.

C3- CHECK LH REAR ABS SENSOR RESISTANCE
- Disconnect LH rear brake anti-lock sensor C308.
- Measure resistance between the pins of the rear ABS sensor.
- Is resistance between 1280 and 1920 ohms?
YES - Service Circuit 518 (LG/R) or Circuit 519 (LG/BK) for an open circuit.
No - Replace LH Rear Brake Anti-lock Sensor.

C4- CHECK LH REAR ABS SENSOR VOLTAGE
- Turn ignition switch to "OFF".
- Raise and support vehicle. Wheels should be free to rotate.
- Set voltmeter to "2 VOLT, AC" range.
- Measure voltage between Pin 17, Circuit 518 (LG/R) and Pin 18, Circuit 519 (LG/BK) at breakout box.
- Spin LH rear wheel at approximately one revolution per second.
- Is voltage greater than 0.1 volt AC?
YES - Go to C5.
No - Check rear brake anti-lock sensor mounting or bolt, air gap and rear brake anti-lock sensor indicator mounting. Service as required. Restore vehicle. Retest system.

C5- CHECK LH REAR BRAKE ABS SENSOR CIRCUIT RESISTANCE TO GROUND
- Check resistance between breakout box Pin 17, Circuit 518 (LG/R) and Pin 1, Circuit 570 (BK/W).
- Is resistance less than 10K ohms?
YES - Go to C6.
No - Go to C7.

C6- CHECK LH REAR BRAKE ABS SENSOR TO GROUND
- Disconnect LH rear brake anti-lock sensor connector C308.
- Check for resistance between each sensor connector pin (sensor side) and a known good ground.
- Is resistance 10K ohms or Less?
YES - Replace LH rear brake anti-lock sensor. Restore vehicle. Retest system.
No - Service Circuit 518 (LG/R) or Circuit 519 (LG/BK) for a short to ground. Reconnect sensor connector. Restore vehicle. Retest system.

C7- CHECK ABS MODULE TO GROUND WIRE
- Measure resistance between breakout box Pin 1, Circuit 570 (BK/W) and a known good ground.
- Is resistance 5 ohms or less?
YES - Go to C8.
No - Service or replace Circuit 570 (BK/W) or Circuit 57 (BK). Restore vehicle. Retest system.

C8- TEST LH REAR BRAKE ANTI-LOCK SENSOR INPUT
- Connect scan tool to DLC.
- Select PID RR_ WSPD.
- Drive vehicle and note PID.
- Is PID active?
YES - System operational. Clear DTC's. Restore vehicle. Retest system.
No - Replace ABS module. Restore vehicle. Retest system.