Diagnostic Test

1) CHECK FOR A DTC C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE
NOTE: The Sensor Cluster is the same as the Dynamics Sensor.

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.

With the scan tool, erase DTCs.

Cycle the ignition switch from off to on.

With the scan tool, read and record DTCs.

Does the scan tool display: C123C-SENSOR CLUSTER MOUNTING/INSTALLATION PERFORMANCE?

Yes
1. Go To 2).
No
1. Refer to the ABS-INTERMITTENT CONDITION TEST .
2. Perform ABS VERIFICATION TEST .
2) CHECK THE WIRING HARNESS, TERMINALS, AND CONNECTORS
Turn ignition off.

Visually inspect the related wiring harness. Look for any bruised, chafed, pierced, or partially broken wires.

Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

Were any problems found?

Yes
1. Repair as necessary.
2. Perform ABS VERIFICATION TEST .
No
1. Go To 3).
3) CHECK THE DYNAMICS SENSOR INSTALLATION
NOTE: Dynamics Sensor installation and mounting bolt torque is crucial for proper operation.

Check the Dynamics Sensor for damaged, modified or bent mounting bracket.

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

Were any problems found?

Yes
1. Repair as needed.
2. Perform ABS VERIFICATION TEST .
No
1. Go To 4).
4) CHECK THE RESISTANCE BETWEEN THE (G94) DYNAMICS SENSOR GROUND CIRCUIT AND GROUND

Fig 1: Checking Dynamics Sensor Ground Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the Dynamics Sensor harness connector.

Measure the resistance between the (G94) Dynamics Sensor Ground circuit and ground.

Is the resistance below 5.0 ohm?

Yes
1. Replace the Dynamics Sensor in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST .
No
1. Repair the (G94) Dynamics Sensor Ground circuit for an open circuit.
2. Perform ABS VERIFICATION TEST .