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 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- 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 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 pin 3, circuit 1908 (WH), harness side and the DLC C251 pin 6, circuit 1908 (WH), harness side.
- Measure the resistance between the ABS module C135 pin 18, circuit 1909 (BK), harness side and the DLC C251 pin 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 ANTI-LOCK CONTROL . 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.