DTC B2647: Ambient Light Sensor Circuit Low: Notes
TBC module monitors circuit No. 278 (White wire) to determine when headlights need to be turned on when headlight switch is in AUTO mode. See WIRING DIAGRAMS . When circuit to TBC module is low, DTC will set.
Conditions for setting DTC:
- Circuit No. 278 (White wire) is shorted to ground or open, or circuit No. 750 (Gray wire) is open.
- System voltage 9-16 volts.
- Conditions met for .5 second.