Pinpoint Test L: The Turn Signal Function Is Inoperative

Turn Signal and Hazard Lamps

Pinpoint Tests

Pinpoint Test L: The Turn Signal Function Is Inoperative

Refer to Wiring Diagram Set 90, Turn Signal/Stop/Hazard Lamps for schematic and connector information. Diagrams By Number

Normal Operation

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

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

This pinpoint test is intended to diagnose the following:

- Multifunction switch
- SCCM

PINPOINT TEST L: THE TURN SIGNAL FUNCTION IS INOPERATIVE

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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 module pass the network test?

Yes
INSTALL a new multifunction switch. REFER to Steering Column Switches Steering Column Multifunction Switch. TEST the system for normal operation. If the concern still exists, INSTALL a new SCCM. REFER to Steering Column Switches Service and Repair. TEST the system for normal operation.

No
REFER to Module Communications Network Testing and Inspection.

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