Pinpoint Test B: The Anti-Lock Brake System (Abs) Module Does Not Respond To The Diagnostic Tool

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

B1 CHECK THE ABS MODULE C135 FOR DAMAGE
- Key in OFF position.
- Disconnect: ABS Module C135.
- Inspect the ABS module for damage.
- Is the ABS module C135 OK?
Yes: GO to B2.

No: REPAIR the ABS module C135 as necessary. CARRY OUT the data link diagnostics test.
B2 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DLC AND THE ABS MODULE FOR AN OPEN
- Measure the resistance between the ABS module C135-26, circuit 1908 (WH), harness side and the DLC C251-6, circuit 1908 (WH), harness side; and between the ABS module C135-14, circuit 1909 (BK), harness side and the DLC C251-14, circuit 1909 (BK), harness side.
  
  Fig 1: Checking High Speed CAN Circuits Between DLC & ABS Module
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
Yes: GO to B3.

No: REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.
B3 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect all the ABS module connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the ABS module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new ABS module. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.

No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.