C1220

C1220-95-WHEEL SPEED SENSORS SWAPPED





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on and vehicle speed above 15 km/h (9 mph) driving straight with no braking.

- Set Condition:
This DTC will set when the Anti-lock Brake System (ABS) Module detects that the rear wheel speed sensors are transposed.





NOTE: Repair all other wheel speed sensor DTCs first before continuing with this diagnostic procedure.

1. VERIFY DTC IS ACTIVE

NOTE: Inspect the tires for improper air pressure and or mismatched tires before continuing, repair as necessary.

1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.

CAUTION: Make sure brake capability is available before road testing.

3. Road test the vehicle over 40 km/h (25 mph).
4. With the scan tool, read DTCs.

Is the DTC active?

Yes

- Go To 2

No

- Perform the ABS-INTERMITTENT CONDITION TEST. ABS Intermittent Condition Test.

2. INSPECT THE REAR WHEEL SPEED SENSOR WIRING
1. Turn the ignition off.
2. Check that the rear wheel speed sensor wiring harnesses are correctly routed to the proper rear wheel speed sensor.

Are the Wheel Speed Sensor's wired correctly?

Yes

- Replace the Anti-Lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.