DTC C12B8 GMC

All Wheel Drive (AWD) Indicator Circuit

All Wheel Drive (AWD) Indicator Circuit

Description

Ignition ON. System voltage 9-18 V. Instrument panel lights not dimmed. Daylight running lights MUST be commanded ON.

Cause and Solution

The TCCM monitors the voltage on the AWD indicator control circuit.The TCCM detects 3.4 V or greater on the AWD indicator control circuit when the AWD indicator is commanded ON.The TCCM detects 1.6 V or less for 1.5 seconds on the AWD indicator control circuit when the AWD indicator is commanded OFF.

Video Guide

Duration: PT4M16S | Uploaded: 2020-06-25

Diagnostic Info

  • DTC Code: C12B8
  • Brand: GMC
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