Pinpoint Test M: The Traction Control Switch Indicator Is Never On

M1 CHECK THE POWERTRAIN CONTROL MODULE (PCM) OPERATION
- Disconnect: PCM C175b.
- Key in ON position.
- Connect a fused (10A) jumper wire between the PCM C175b pin 37, circuit 960 (BK/LB), harness side and ground.
  
  Fig 1: Connecting Fused (10A) Jumper Wire Between PCM Circuit 960 (BK/LB), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Does the traction control switch indicator illuminate?
- Yes : GO to M6.
- No : GO to M2.
M2 CHECK CIRCUIT 960 (BK/LB) FOR AN OPEN
- Disconnect: LCM C2145b.
- Measure the resistance between the PCM C175b pin 37, circuit 960 (BK/LB), harness side and the lighting control module (LCM) C2145b pin 1, circuit 960 (BK/LB), harness side.
  
  Fig 2: Measuring Resistance Between PCM C175B Pin 37, Circuit 960 (BK/LB)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to M3.
- No : REPAIR the circuit. TEST the system for normal operation.
M3 CHECK THE LIGHTING CONTROL MODULE (LCM) OPERATION
- Disconnect: LCM C2145b.
- Key in ON position.
- Connect a fused (10A) jumper wire between the LCM C2145b pin 2, circuit 961 (WH/PK), harness side and battery voltage.
  
  Fig 3: Connecting Fused (10A) Jumper Wire Between LCM C2145B Pin 2, Circuit 961 (WH/PK)
  Courtesy of FORD MOTOR CO.
- Does the traction control switch indicator illuminate?
- Yes : GO to M9.
- No : GO to M4.
M4 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Disconnect: Traction Control Switch C280.
- Measure the resistance between the traction control switch C280 pin 7, circuit 57 (BK), harness side and ground.
  
  Fig 4: Measuring Resistance Between C280 Pin 7, Circuit 57 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to M5.
- No : REPAIR the circuit. TEST the system for normal operation.
M5 CHECK CIRCUIT 961 (WH/PK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the traction control switch C280 pin 4, circuit 961 (WH/PK), harness side and the LCM pin 2, circuit 961 (WH/PK), harness side.
  
  Fig 5: Measuring Resistance Between Traction Control Switch C280 Pin 4, Circuit 961 (WH/PK)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new traction control switch. TEST the system for normal operation.
- No : REPAIR the circuit. TEST the system for normal operation.
M6 CHECK THE TRACTION CONTROL SWITCH OPERATION
- Key in OFF position.
- Disconnect: Traction Control Switch C280.
- Measure the resistance between the traction control switch pin 1, component side and the traction control switch pin 2, component side while pressing and releasing the traction control switch.
  
  Fig 6: Measuring Resistance Between Traction Control Switch Pin 1
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms with the traction control switch pressed and greater than 10,000 ohms with the traction control switch released?
- Yes : GO to M7.
- No : INSTALL a new traction control switch. TEST the system for normal operation.
M7 CHECK CIRCUITS 57 (BK) FOR AN OPEN
- Disconnect: Traction Control Switch C280.
- Measure the resistance between the traction control switch C280 pin 2, circuit 57 (BK), harness side and ground.
  
  Fig 7: Measuring Resistance Between C280 Pin 2, Circuit 57 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to M8.
- No : REPAIR the circuit. TEST the system for normal operation.
M8 CHECK CIRCUIT 959 (GY) FOR AN OPEN
- Disconnect: ABS Module C135.
- Measure the resistance between the ABS module C135 pin 11, circuit 959 (GY), harness side and the traction control switch C280 pin 1, circuit 959 (GY), harness side.
  
  Fig 8: Measuring Resistance Between ABS Module C135 Pin 11, Circuit 959 (GY)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a known good ABS module. TEST the system for normal operation. If the traction control switch indicator operates correctly GO to M11. If not, GO to M10.
- No : REPAIR the circuit. TEST the system for normal operation.
M9 CHECK FOR CORRECT LCM OPERATION
- Disconnect all the LCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the LCM connectors and make sure they seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new LCM module. REFER to MULTIFUNCTION ELECTRONIC MODULES . CLEAR the DTCs. REPEAT the self-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. CARRY OUT the self-test with the brake pedal not applied.
M10 CHECK FOR CORRECT POWERTRAIN CONTROL MODULE (PCM) OPERATION
- Disconnect all the PCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the PCM 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 PCM. REFER to ELECTRONIC ENGINE CONTROLS . CLEAR the DTCs. REPEAT the self-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.
M11 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect the ABS module connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the ABS module connector and make sure it seats 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 BRAKE SYSTEM (ABS) MODULE . CLEAR the DTCs. REPEAT the self-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.