Pinpoint Test I: The Traction Control System Is Inoperative

NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

I1 CHECK HS-CAN BUS
- Connect the diagnostic tool.
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Network Test
- Using the scan tool, carry out the network test. Retrieve and record any DTCs.
- Does the network test fail or are any communication DTCs present?
1. YES : REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the communication concern.
2. NO : Go to I2.
I2 CHECK FOR INSTRUMENT CLUSTER DTCs
- Enter the following diagnostic mode on the diagnostic tool: Self Test Instrument Cluster
- Using the scan tool, carry out the instrument cluster self-test. Retrieve and record any instrument cluster DTCs.
- Are any instrument cluster DTCs present?
1. YES : Go to the INSTRUMENT CLUSTER DTC CHART .
2. NO : Go to I3.
I3 CHECK FOR ABS MODULE DTCs
- Enter the following diagnostic mode on the diagnostic tool: Self Test ABS
- Using the scan tool, carry out the ABS module self-test. Retrieve and record any ABS module DTCs.
- Are any ABS module DTCs present?
1. YES : Go to the ABS MODULE DTC CHART .
2. NO : Go to I4.
I4 CHECK FOR CORRECT ABS MODULE OPERATION
- Key in OFF position.
- Disconnect: ABS Module C135
- Check the connector for:
  - corrosion.
  - spread terminals.
  - pushed-out pins.
- Connect: ABS Module C135
- Make sure the connector seats properly, then operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : INSPECT the wheel speed sensor tone ring for damage and looseness. INSTALL new components as necessary. If the tone ring is OK, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CLEAR the DTCs. REPEAT the self-test.
2. 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.