Pinpoint Test Q: DTC C1969 - Traction Control/Yaw Control Switch Circuit Fault

Q1 CHECK FOR DTCs
- Connect the diagnostic tool.
- Retrieve and document continuous DTCs.
- Are any DTCs retrieved?
Yes : GO to the ANTI-LOCK BRAKE SYSTEM (ABS)/TRACTION CONTROL AND ABS/TRACTION CONTROL WITH ADVANCE TRAC®/IVD DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to Q2 .
Q2 CHECK THE ADVANCE TRAC®/IVD SWITCH
- Disconnect: Advance Trac®/IVD Switch C3208.
- Key in OFF position.
- Press and hold the Advance Trac®/IVD switch in the ON position.
- Measure the resistance between Advance Trac®/IVD switch C3208-4, circuit 8-CF54 (WH/VT), component side and between the Advance Trac®/IVD switch C3208-3, circuit 20-CF54 (PK/WH), component side.
  
  Fig 1: Checking Advance Trac®/IVD Switch
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 5 ohms?
Yes : INSTALL a new Advance Trac®/IVD switch. TEST the system for normal operation.

No : GO to Q3 .
Q3 CHECK THE VOLTAGE TO THE ADVANCE TRAC®/IVD SWITCH
- Key in ON position.
- Measure the voltage between Advance Trac®/IVD switch C3208-3, circuit 20-CF54 (PK/WH), harness side and ground.
  
  Fig 2: Checking Voltage To Advance Trac®/IVD Switch
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to Q4 .

No : REPAIR the circuit in question. TEST the system for normal operation.
Q4 CHECK THE ADVANCE TRAC®/IVD SWITCH INPUT
- Key in OFF position.
- Connect: Advance Trac®/IVD Switch C3208.
- Disconnect: ABS Module C155.
- Key in ON position.
- Measure the voltage between ABS module C155-38, circuit 8- CF54 (WH/VT), harness side and ground while pressing the Advance Trac®/IVD switch ON.
  
  Fig 3: Checking Advance Trac®/IVD Switch Input
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : RELEASE the Advance Trac®/IVD switch. If the voltage drops to less than 2 volts, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . GO to Q5 .

No : REPAIR the circuit in question. TEST the system for normal operation.
Q5 CHECK CIRCUIT 8-CF54 (WH/VT) FOR A SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: ABS Module C155.
- Key in ON position.
- Measure the voltage between ABS module C155-38, circuit 8- CF54 (WH/VT), harness side and ground.
  
  Fig 4: Checking Circuit 8-CF54 (WH/VT) For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
Yes : REPAIR the circuit. CLEAR the DTC. REPEAT the self-test.

No : GO to Q6 .
Q6 CHECK CIRCUIT 31S-CF45 (BK/GN) FOR A SHORT TO VOLTAGE
- Measure the voltage between ABS module C155-13, circuit 31S-CF45 (BK/GN), harness side and ground; and between Advance Trac®/IVD switch C3208-1, circuit 31S-CF45 (BK/GN), harness side and ground.
  
  Fig 5: Checking Circuit 31S-CF45 (BK/GN) For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is voltage present?
Yes : REPAIR the circuit. TEST the system for normal operation.

No : GO to Q7 .
Q7 CHECK CIRCUIT 31S-CF45 (BK/GN) FOR A SHORT TO GROUND
- Measure the resistance between ABS module C155-13, circuit 31S-CF45 (BK/GN), harness side and ground.
  
  Fig 6: Checking Circuit 31S-CF45 (BK/GN) For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . TEST the system for normal operation.

No : REPAIR the circuit in question. TEST the system for normal operation.