Diagnostic Test

1) CHECK FOR A DTC C1234-DRIVE TEST: SENSOR CLUSTER INSTALLATION
NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.

With the scan tool, read and record DTCs.

With the scan tool, read and record Freeze Frame information.

Perform ECU initialization with drive test.

Start the engine.

With the scan tool, read and record DTCs.

Does the scan tool display: C1234-DRIVE TEST: SENSOR CLUSTER INSTALLATION?

Yes
1. Go To 2).
No
1. Refer to the ABS-INTERMITTENT CONDITION TEST .
2. Perform ABS VERIFICATION TEST .
2) CHECK THE DYNAMICS SENSOR INSTALLATION
NOTE: Dynamics Sensor installation and mounting bolt torque is crucial for proper operation.

Turn the ignition off.

Check the Dynamics Sensor for damaged, modified, and bent mounting brackets.

Check the Dynamics Sensor mounting bolts for a loose or over tightened condition.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform ABS VERIFICATION TEST .
No
1. Go To 3).
3) REPLACE DYNAMICS SENSOR & VERIFY IF DTC IS STILL ACTIVE
Replace the Dynamics Sensor in accordance with the Service Information. Perform ABS VERIFICATION TEST .

WARNING: Ensure brake capability is available before road testing.

Park the vehicle.

With the scan tool, read ABS DTCs.

Does this DTC reset?

Yes
1. Replace the Anti-Lock Brakes Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST .
No
1. Test complete.
2. Perform ABS VERIFICATION TEST .