Pinpoint Test L: The Turn Signal Function Is Inoperative

Turn Signal and Hazard Lamps

Pinpoint Test L: The Turn Signal Function Is Inoperative


Normal Operation

The Steering Column Control Module (SCCM) monitors multifunction switch input. The SCCM (Steering Column Control Module) sends a message to the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN), indicating the multifunction switch is in the OFF, LH or RH TURN position. When the BCM (Body Control Module) receives a message indicating a LH or RH turn request, the BCM (Body Control Module) provides on/off voltage to the appropriate turn lamps.

- DTC B1D36:09 (Turn Indicator Switch: Component Failure)- This DTC sets when the BCM (Body Control Module) detects an input concern from the multifunction switch.

This pinpoint test is intended to diagnose the following:

- Multifunction switch

- SCCM (Steering Column Control Module)

PINPOINT TEST L : THE TURN SIGNAL FUNCTION IS INOPERATIVE

L1 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Network Test.

- Carry out the network test.

Does the SCCM (Steering Column Control Module) module pass the network test?

Yes
INSTALL a new multifunction switch. TEST the system for normal operation.

If the concern still exists, INSTALL a new SCCM (Steering Column Control Module). TEST the system for normal operation.
No
REFER to Information Bus.