Pinpoint Test Q: DTC C1969 - TRACTION CONTROL/YAW CONTROL SWITCH CIRCUIT FAULT

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

Q1 CHECK FOR DTCs
- Connect the diagnostic tool.
- Retrieve and document continuous DTCs.
- Are any DTCs retrieved?
- Yes : GO to the ABS MODULE 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: Measuring Resistance Between Advance Trac®/Ivd Switch C3208-4, circuit 8-CF54, Component Side And Advance Trac®/Ivd Switch C3208-3, Circuit 20-CF54, Component Side
  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: Measuring Voltage Between Advance Trac®/IVD Switch C3208-3, Circuit 20-CF54 (PK/WH), Harness Side And Ground
  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: Measuring Voltage Between ABS Module C155-38, Circuit 8-CF54 (WH/VT), Harness Side And Ground
  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 in this article . 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: Measuring Voltage Between ABS Module C155-38, Circuit 8-CF54 (WH/VT), Harness Side And Ground
  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: Measuring Voltage Between ABS Module C155-13, circuit 31S-CF45, Harness Side And Ground; And Between Advance Trac®/IVD Switch C3208-1, Circuit 31S-CF45, Harness Side And Ground
  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: Measuring Resistance Between ABS Module C155-13, Circuit 31S-CF45 (BK/GN), Harness Side And 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 in this article . TEST the system for normal operation.
- No : REPAIR the circuit in question. TEST the system for normal operation.