Pinpoint Test H: 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. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK THE ABS C135
- Key in OFF position.
- Disconnect: ABS C135.
- Inspect the ABS C135 for damage.
- Is the ABS C135 OK?
- Yes : GO to H2.
- No : REPAIR the ABS C135 as necessary. CARRY OUT the data link diagnostics test.
H2 CHECK CIRCUITS 1827 (WH/LG) AND 1828 (PK/LG) BETWEEN THE ABS C135 AND THE DATA LINK CONNECTOR (DLC) C251 FOR AN OPEN
- Measure the resistance between the ABS C135-18, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side.
  
  Fig 1: Measuring Resistance Between ABS C135-18, Circuit 1827 (WH/LG), Harness Side And DLC C251-6, Circuit 1827 (WH/LG), Harness Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the ABS C135-28, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side.
  
  Fig 2: Measuring Resistance Between ABS C135-28, Circuit 1828 (PK/LG), Harness Side And DLC C251-14, Circuit 1828 (PK/LG), Harness Side
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to H3.
- No : REPAIR the circuit in question. CARRY OUT the data link diagnostics test.
H3 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect all the ABS module connectors.
- Check for:
  - Corrosion
  - Push-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. CARRY OUT the data link diagnostics test.