Circuit Description

TBC module monitors the voltage on circuit No. 1732 (Orange wire) as an input circuit. See WIRING DIAGRAMS  . DTC will set when voltage in this circuit is low and TBC module is commanding circuit No. 1391 (Dark Blue wire) low. TBC module uses circuit No. 1393 (Dark Blue wire) to turn on the inadvertent power relay. Before TBC module goes to sleep, it turn off the relay. TBC module also monitors ignition switch position based on ignition signal inputs.

Conditions for setting DTC:

• When TBC module is commanding circuit No. 1393 to ground and TBC receives a low input on circuit No. 1732 or a short to ground on circuit No. 1732.
• System voltage 9-16 volts.
• Conditions must be met for .5 second.