Normal Operation

When the key is inserted into the ignition lock cylinder, the key-in-ignition switch (part of the ignition switch) closes circuit 1716 (GY/YE) and circuit 158 (BK/PK) to the lighting control module (LCM), providing a voltage signal. The voltage input signals the LCM that the key is inserted. If the LCM detects that the ignition switch is in the OFF or ACC position, the key is inserted in the ignition lock cylinder, and the driver door is ajar, the key-in-ignition warning chime sounds.

• DTC B1352 (Ignition Key-In Circuit Failure) - is a continuous DTC that sets if the LCM detects a key-in signal inactive while RUN/ACC and/or RUN/START are active. It is also an on-demand DTC that sets if the LCM detects that the key is not in or that circuit 158 (BK/PK) is open or short to ground.

This pinpoint test is intended to diagnose the following:

• Fuse
• Wiring, terminals or connectors
• Key-in-ignition warning switch (part of the ignition switch)
• LCM