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 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. 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 C135 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 CAN CIRCUITS 1908 (WH) AND 1909 (BK) FOR AN OPEN BETWEEN THE DATA LINK CONNECTOR (DLC) C251 AND THE ABS MODULE C135
- Measure the resistance between the ABS module C135-3, circuit 1908 (WH), harness side and the DLC C251-6, circuit 1908 (WH), harness side.
  
  Fig 1: Checking CAN Circuits 1908 (WH) And 1909 (BK) For Open Between Data Link Connector C251 And ABS Module C135
- Measure the resistance between the ABS module C135-18, circuit 1909 (BK), harness side and the DLC C251-14, circuit 1909 (BK), harness side.
  
  Fig 2: Checking Resistance Between ABS Module C135-18 Circuit 1909 (BK) And DLC C251-14 Circuit 1909 (BK) Harness Side
- Are the resistances less than 5 ohms?
Yes : Go to B3.

No : REPAIR the circuit in question. 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 VEHICLE DYNAMIC SYSTEMS . 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 diagnostic trouble codes (DTCs). REPEAT the self-test.