Circuit Description

When ignition switch is turned to on position, and ECM lights MIL (bulb check), voltage change on MIL control circuit is used as a wake up signal to theft deterrent module. If a problem with this circuit prevents theft deterrent module from receiving wake up signal, this DTC will set.

Head of ignition key contains a transponder which is matched to a code in theft deterrent system. If a key is used that has the wrong or no code, vehicle will not start, and this DTC will set. DTC can also indicate theft deterrent module has detected a problem within theft deterrent system. Theft deterrent module sends a signal to ECM, causing this DTC to set.

Conditions required to set DTC are:

• Requested by theft deterrent module.