Pinpoint Test F: The Stability/Traction Control System is Inoperative or Cannot be Disabled
Anti-Lock Control
Pinpoint Tests
Pinpoint Test F: The Stability/Traction Control System is Inoperative or Cannot be Disabled
Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information. Diagrams By Number
Normal Operation
The stability/traction control switch is a normally open switch. When the switch is pressed, the Instrument Cluster (IC) senses ground through the switch and sends a message to the ABS module along the High Speed Controller Area Network (HS-CAN) bus to disable the stability/traction control system. The IC will also illuminate the sliding-car OFF icon.
The IC is connected to the stability/traction control switch along circuit CCB23 (VT/GN) and the switch is connected to ground along circuit GD174 (BK/WH).
- DTC C2775 (TC/AYC ON/OFF Switch Stuck Failure) - If the IC senses a short to ground on stability/traction control switch circuit, if the stability/traction control switch is pressed for longer than 30 seconds, or if the stability/traction control switch is pressed during the on-demand self test, DTC C2775 will be set.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Stability/traction control switch
- IC
PINPOINT TEST F: THE STABILITY/TRACTION CONTROL SYSTEM IS INOPERATIVE OR CANNOT BE DISABLED
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
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F1 CHECK FOR ABS MODULE DTCs
- Attempt to disable the traction control system by pressing the Stability/Traction Control Switch.
- Connect the scan tool.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module .
- Is DTC U0073, U0155 or U0423 present?
Yes
For DTCs U0073 and U0155, GO to Module Communications Network Testing and Inspection. For DTC U0423, CARRY OUT a self-test of the IC and REFER to Instrumentation and Warning Chimes Testing and Inspection to diagnose the IC concern.
No
GO to F2.
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F2 ISOLATE THE STABILITY/TRACTION CONTROL SWITCH
- Ignition OFF.
- Disconnect: Stability/Traction Control Switch C280 .
- Measure the resistance between stability/traction control switch pin-1 and pin-6, component side, while pressing and releasing the switch.
- Is the resistance less than 5 ohms with the switch pressed and greater than 10,000 ohms with the switch released?
Yes
GO to F3.
No
INSTALL a new stability/traction control switch. REFER to Traction Control Switch Service and Repair. TEST the system for normal operation.
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F3 CHECK THE SWITCH INPUT CIRCUIT FOR A SHORT TO GROUND
- Disconnect: IC C220B .
- Measure the resistance between stability/traction control switch C280-1, circuit CCB23 (VT/GN), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to F4.
No
REPAIR circuit CCB23 (VT/GN). TEST the system for normal operation.
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F4 CHECK THE SWITCH INPUT CIRCUIT FOR AN OPEN
- Measure the resistance between stability/traction control switch C280-1, circuit CCB23 (VT/GN), harness side and IC C220B-16, circuit CCB23 (VT/GN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to F5.
No
REPAIR circuit CCB23 (VT/GN). TEST the system for normal operation.
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F5 CHECK THE SWITCH GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between stability/traction control switch C280-6, circuit GD174 (BK/WH), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to F6.
No
REPAIR circuit GD174 (BK/WH). TEST the system for normal operation.
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F6 CHECK FOR CORRECT IC OPERATION
- Check IC C220 for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect the IC connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new IC. REFER to Instrumentation and Warning Chimes Instrument Cluster (IC). CLEAR the DTCs. REPEAT the self-test.
No
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.
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