Circuit Description

The TBC module monitors circuit No. 187 (Light Blue) to determine if rear foglight circuit is shorted to ground. See procedures in WIRING DIAGRAMS  . When circuit is shorted to ground for 184 seconds, DTC will set. TBC module also monitors ignition switch position based on ignition signal inputs.

Conditions for setting DTC:

• Circuit No. 187 is shorted to ground.
• System voltage 9-16 volts.
• Conditions present for 184 seconds.