Pinpoint Test N: THE ADVANCE Trac®/IVD IS INOPERATIVE

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.

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.

N1 CHECK FOR DTCs
- Connect the diagnostic tool.
- Retrieve and document continuous DTCs.
- Are any DTCs retrieved?
- Yes : GO to the ABS (WITH OR WITHOUT ADVANCE TRAC®/IVD) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
- No : GO to N2.
N2 CHECK THE Advance Trac®/IVD SWITCH
- Disconnect: Advance Trac®/IVD Switch C3208.
- Key in OFF position.
- Press the Advance Trac®/IVD switch to the ON position.
- Measure the resistance between Advance Trac®/IVD switch C3208-3, circuit 20-CF54 (PK/WH), component side and C3208-4, circuit 8-CF54 (WH/VT), component side.
  
  Fig 1: Measuring Resistance Between Advance Trac®/IVD Switch C3208-3, Circuit 20-CF54 (PK/WH), Component Side And C3208-4, Circuit 8-CF54 (WH/VT), Component Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to N3.
- No : INSTALL a new Advance Trac®/IVD switch. TEST the system for normal operation. GO to N3.
N3 CHECK CIRCUIT 8-CF54 (WH/VT) FOR AN OPEN
- Key in OFF position.
- Disconnect: ABS Module C155.
- Measure the resistance between ABS module C155-38, circuit 8-CF54 (WH/VT), harness side and Advance Trac®/IVD switch connector C3208-4, circuit 8-CF54 (WH/VT), harness side.
  
  Fig 2: Measuring Resistance Between ABS Module C155-38, Circuit 8-CF54, Harness Side And Advance Trac®/IVD Switch Connector C3208-4, Circuit 8-CF54, Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE in this article .
- No : REPAIR the circuit in question. TEST the system for normal operation.