Pinpoint Test A: No Communication With The Anti-Lock Brake System (Abs) Module

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

A1 CHECK THE VOLTAGE TO THE ABS MODULE
- Key in OFF position.
- Disconnect: ABS Module C135 (with traction control).
- Disconnect: ABS Module C155 (without traction control).
- Key in ON position.
- If equipped with traction control, measure the voltage between the ABS module C135 pin 4, circuit 15-CF6A (GN/YE), harness side and ground.
  
  Fig 1: Measuring Voltage Between ABS Module C135 Pin 4, Circuit 15-CF6A (GN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- If not equipped with traction control, measure the voltage between the ABS module C155 pin 20, circuit 15-CF6A (GN/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between ABS Module C155 Pin 20, Circuit 15-CF6A (GN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
  - Yes : GO to A2.
  - No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
A2 CHECK THE ABS MODULE GROUND(S)
- Key in OFF position.
- If equipped with traction control, measure the resistance between the ABS module C135 pin 16, circuit 31-CF6 (BK), harness side and ground; and between the ABS module C135 pin 47, circuit 31-CF13 (BK), harness side and ground.
  
  Fig 3: Measuring Resistance Between ABS Module C135 Pin 16, Circuit 31-CF6 (BK), Harness Side And Ground And Between ABS Module C135 Pin 47, Circuit 31-CF13 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- If not equipped with traction control measure the resistance between the ABS module C155 pin 26, circuit 31-CF6 (BK), harness side and ground.
  
  Fig 4: Measuring Resistance Between ABS Module C155 Pin 26, Circuit 31-CF6 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
  - Yes : REFER to MODULE COMMUNICATIONS NETWORK .
  - No : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.