Diagnostic Routine M

Diagnostic Routine M

Diagnostic Overview

The Traction Control System Cannot Be Disabled

Refer to Wiring Diagram Set 60 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

Traction control system status is relayed to the driver by the stability/traction control disabled indicator (sliding car OFF icon) in the IPC (Instrument Panel Cluster). When the driver deactivates the traction control, the IPC (Instrument Panel Cluster) sends a message to the BCM (Body Control Module) over the MS-CAN (Medium Speed Controller Area Network) that the driver has requested the traction control to be disabled. The BCM (Body Control Module), acting as a gateway, relays this message to the ABS (Anti-Lock Brake System) module over the HS-CAN (High Speed Controller Area Network). The ABS (Anti-Lock Brake System) module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.

The ABS (Anti-Lock Brake System) module then sends a message to the BCM (Body Control Module) over the HS-CAN (High Speed Controller Area Network) to illuminate the sliding car OFF icon. The BCM (Body Control Module), acting as a gateway, relays this message to the IPC (Instrument Panel Cluster) over the MS-CAN (Medium Speed Controller Area Network). The IPC (Instrument Panel Cluster) responds by illuminating the sliding car OFF icon. The traction control system remains deactivated until the driver changes the traction control state in the message center or until the ignition is cycled.

If equipped, MyKey(R) allows users to configure traction control to be either always on or selectable. If a MyKey(R) restricted key is in use with the AdvanceTrac(R) always on feature configured to "on", the traction control system cannot be disabled. An admin key must be used in order to enable and disable the traction control system.

Pinpoint Test

1. VERIFY THAT THE KEY IN USE IS NOT RESTRICTED

1. Monitor the message center.

2. Ignition ON.

Does the message center display MYKEY ACTIVE DRIVE SAFELY?






2. VERIFY THE MyKey(R) TRACTION CONTROL SETTING

1. Using the message center switch, verify the MyKey(R) traction control setting. Refer to the Owner's Literature.

Is the MyKey(R) traction control setting configured to" always on"?






3. CHECK FOR ABS (Anti-Lock Brake System) MODULE DTCs (Diagnostic Trouble Codes)

1. Using a scan tool, carry out the ABS (Anti-Lock Brake System) self-test.

2. Retrieve and record all ABS (Anti-Lock Brake System) DTCs (Diagnostic Trouble Codes).

Are there any ABS (Anti-Lock Brake System) DTCs (Diagnostic Trouble Codes) present?






4. CHECK FOR IPC (Instrument Panel Cluster) DTCs (Diagnostic Trouble Codes)

1. Using a scan tool, carry out the IPC (Instrument Panel Cluster) self-test.

2. Retrieve and record all IPC (Instrument Panel Cluster) DTCs (Diagnostic Trouble Codes).

Are there any IPC (Instrument Panel Cluster) DTCs (Diagnostic Trouble Codes) present?






5. CHECK FOR BCM (Body Control Module) DTCs (Diagnostic Trouble Codes)

1. Using a scan tool, carry out the BCM (Body Control Module) self-test.

2. Retrieve and record all BCM (Body Control Module) DTCs (Diagnostic Trouble Codes).

Are there any BCM (Body Control Module) DTCs (Diagnostic Trouble Codes) present?