No Response From ABS (Antilock Brake Module)

NO RESPONSE FROM ABS (ANTILOCK BRAKE MODULE)












1. TEST FOR INTERMITTENT CONDITION

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

1. Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

2. With the scan tool, select ECU View.

NOTE: A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red "X" next to the module?

Yes

- Go To 2

No

- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.

2. (A107) (A111) FUSED B(+) CIRCUIT OPEN OR SHORTED




1. Turn the ignition off.
2. Disconnect the Antilock Brake Module harness connector.
3. Using a 12-volt test light connected to ground, check each (A107) and (A111) Fused B(+) circuit.

Does the test light illuminate brightly for each circuit?

Yes

- Go To 3

No

- Repair the (A107) or (A111) Fused B(+) circuit for an open or short.
- Perform ABS VERIFICATION TEST. ABS Verification Test

3. (Z903) (Z933) GROUND CIRCUIT OPEN




1. Using a 12-volt test light connected to 12-volts, check each (Z903) or (Z933) ground circuit.

Does the test light illuminate brightly for each circuit?

Yes

- Go To 4

No

- Repair the (Z903) or (Z933) ground circuit for an open.
- Perform ABS VERIFICATION TEST. ABS Verification Test

4. (F20) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT OPEN OR SHORTED




1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F20) Fused Ignition Switch Output (Run) circuit.

Does the test light illuminate brightly?

Yes

- Go To 5

No

- Repair the (F20) Fused Ignition Switch Output (Run) circuit for an open or short.
- Perform ABS VERIFICATION TEST. ABS Verification Test

5. (D25) PCI BUS CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the negative battery cable.
3. Disconnect the ABS harness connector.
4. Disconnect the scan tool from the DLC connector.
5. Measure the resistance of the (D25) PCI Bus circuit between the DLC and the ABS harness connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Anti-Lock Brakes Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Repair the (D25) PCI Bus circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test