Test K: The Traction Control Switch Indicator Is Always on

Test K: The Traction Control Switch Indicator Is Always On

Refer to Vehicle/Diagrams, Lighting Control Module for schematic and connector information.
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.
Refer to Vehicle/Diagrams, Instrument Cluster for schematic and connector information.

Normal Operation
The anti-lock brake system (ABS) module sends a reference voltage to the traction control switch along circuit 959 (GY) to the traction control switch. When the switch is pressed, the reference voltage continues through the switch to ground along circuit 57 (BK). The ABS module then disables the traction control system when it detects this change in reference voltage and sends a message to the instrument cluster along the CAN bus to illuminate the indicator. After receiving the ABS module message, the instrument cluster sends a message to the lighting control module (LCM) to illuminate the indicator and the LCM supplies voltage to circuit 961 (WH/PK) which illuminates the indicator.

Possible Causes
^ Circuit open
^ Circuit shorted
^ Lighting control module
^ Instrument cluster
^ ABS module

K1-K6:

K6-K7: