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

WARNING: This page is about a different car, the 2004 Lincoln Town Car. 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.

G1 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) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

GO to G2.

G2 CHECK THE TRACTION CONTROL SWITCH

Key in OFF position.
Disconnect: Traction Control Switch C280.
Measure the resistance between the traction control switch C280 pin 1, component side and pin 2, component side while pressing and releasing the traction control switch.
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 G3.

INSTALL a new traction control switch. TEST the system for normal operation.

G3 CHECK CIRCUIT 959 (GY) FOR OPEN

Key in OFF position.
Disconnect: ABS Module C135.
Disconnect: Traction Control Switch C280.
Measure the resistance between the ABS module C135 pin 17, circuit 959 (GY), harness side and the traction control switch C280 pin 1, circuit 959 (GY), harness side.
Is the resistance greater than 5 ohms?

Yes

REPAIR the circuit. TEST the system for normal operation.

GO to G4.

G4 CHECK CIRCUIT 57 (BK) FOR AN OPEN

Measure the resistance between the traction control switch C280 pin 2, circuit 57 (BK), harness side and ground.
Is the resistance less than 5 ohms?

Yes

GO to G5.

REPAIR the circuit. TEST the system for normal operation.

G5 CHECK CIRCUIT 959 (GY) FOR SHORT TO GROUND

Disconnect: Traction Control Switch C280.
Measure the resistance between traction control switch C280 pin 1, circuit 959 (GY), harness side and ground.
Is the resistance greater than 10,000 ohms?

Yes

GO to G6.

REPAIR the circuit. TEST the system for normal operation.

G6 CHECK FOR CORRECT ABS MODULE OPERATION

Disconnect all ABS module connectors.
Check for the following:
- Corrosion
- Pushed-out pins
Connect all the ABS module connectors and make sure they are seated correctly.
Operate the system and determine if the concern is still present.
Is the concern still present?

Yes

INSTALL a new ABS module. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . CLEAR the DTCs.

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.