Diagnostic Test

1) CHECK FOR A DTC C2200-ANTI-LOCK BRAKE MODULE INTERNAL
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: C2200-ANTI-LOCK BRAKE MODULE INTERNAL?

Yes
1. Go To Step 2).
No
1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
2. Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to BRAKES - DIAGNOSIS AND TESTING - ABS-INTERMITTENT CONDITION) .
2) CHECK THE WIRING HARNESS, TERMINALS, AND CONNECTORS
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. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .
No
1. Go To Step 3).
3) CHECK THE VOLTAGE ON THE (A922) FUSED B(+) CIRCUIT

Fig 1: CHECKINGE THE VOLTAGE ON THE (A922) FUSED B(+) CIRCUIT
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Measure the voltage of the (A922) Fused B(+) circuit in the Anti-Lock Brake Module harness connector.

Is the voltage above 10 volts?

Yes
1. Go To Step 7).
No
1. Go To Step 4).
4) CHECK THE (A922) FUSED B(+) CIRCUIT FOR A SHORT TO GROUND

Fig 2: CHECKING THE (A922) FUSED B(+) CIRCUIT FOR SHORT TO GROUND
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Using a 12-volt test light connected to 12-volts, check the (A922) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes
1. Repair the (A922) Fused B(+) circuit for a short to ground.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .
No
1. Go To Step 5).
5) CHECK THE (A922) FUSED B(+) CIRCUIT FOR A SHORT TO VOLTAGE

Fig 3: CHECKING THE (A922) FUSED B(+) CIRCUIT FOR SHORT TO VOLTAGE
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Using a 12-volt test light connected to ground, check the (A922) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes
1. Repair the (A922) Fused B(+) circuit for a short to voltage.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .
No
1. Go To Step 6).
6) CHECK THE (A922) FUSED B(+) CIRCUIT FOR AN OPEN

Fig 4: CHECKING THE (A922) FUSED B(+) CIRCUIT FOR OPEN
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Remove the Anti-Lock Brake Module Fused B(+) fuse.

Disconnect the Anti-Lock Brake Module harness connector.

Connect a jumper wire between the (A922) Fused B(+) circuit and ground.

Using a 12-volt test light connected to 12-volts, check the (A922) Fused B(+) circuit.

Does the test light illuminate brightly?

Yes
1. Replace the Integrated Power Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .
No
1. Repair the (A922) Fused B(+) circuit for an open.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .
7) CHECK THE (Z902) GROUND CIRCUIT FOR AN OPEN

Fig 5: CHECKING THE (Z902) GROUND CIRCUIT FOR OPEN
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Anti-Lock Brake Module harness connector.

Measure the resistance between the (Z902) Ground circuit and ground.

Is the resistance below 5.0 ohms?

Yes
1. Replace the Anti-Lock Brake Module in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .
No
1. Repair the (Z902) Ground circuit for an open.
2. Perform ABS VERIFICATION TEST. (Refer to BRAKES - STANDARD PROCEDURE - ABS VERIFICATION TEST) .