Pinpoint Test H: The Traction Control Is Inoperative/Cannot Be Disabled

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: The Flex Probe Kit must be used for all test connections. Use of standard multimeter probes may damage wiring terminals.

H1 CHECK THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
- Connect the scan tool.
- Key in ON position.
- Using the diagnostic tool, retrieve and document any continuous DTCs.
- Are DTCs retrieved?
Yes : GO to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to H2.
H2 CHECK THE TRACTION CONTROL SWITCH
- Key in OFF position.
- Disconnect: Traction Control Switch C280.
- Place the traction control switch in the ON position.
- Measure the resistance between traction control switch C280-1, circuit 959 (GY), component side and traction control switch C280-2, circuit 57 (BK), component side.
  
  Fig 1: Measuring Resistance Between Traction Control Switch C280-1, Circuit 959 (GY), And Traction Control Switch C280-2, Circuit 57 (BK)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to H3.

No : INSTALL a new traction control switch. TEST the system for normal operation.
H3 CHECK CIRCUIT 959 (GY) FOR AN OPEN
- Key in OFF position.
- Disconnect: ABS Module C135.
- Disconnect: Traction Control Switch C280.
- Measure the resistance between ABS module C135-11, circuit 959 (GY), harness side and traction control switch C280-1, circuit 959 (GY), harness side.
  
  Fig 2: Measuring Resistance Between ABS Module C135-11, And Traction Control Switch C280-1
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 5 ohms?
Yes : REPAIR circuit 959 (GY) for an open. TEST the system for normal operation.

No : GO to H4.
H4 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between traction control switch C280-2, circuit 57 (BK), harness side and ground.
  
  Fig 3: Measuring Resistance Between Traction Control Switch C280-2, Circuit 57 (BK), And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 5 ohms?
Yes : REPAIR circuit 57 (BK) for an open. TEST the system for normal operation.

No : GO to H5.
H5 CHECK CIRCUIT 959 (GY) FOR A SHORT TO GROUND
- Measure the resistance between traction control switch C280-1, circuit 959 (GY), harness side and ground.
  
  Fig 4: Measuring Resistance Between Traction Control Switch C280-1, Circuit 959 (GY), And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 10,000 ohms?
Yes : REPAIR circuit 959 (GY) for a short to ground. TEST the system for normal operation.

No : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.