Normal Operation

The Instrument Cluster (IC) receives the key-in-ignition warning status from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN). The key-in-ignition warning switch (part of the ignition switch) is hardwired to the SJB  . When the key is inserted into the ignition lock cylinder, the key-in-ignition switch closes and supplies voltage to the SJB  . The SJB  monitors the door ajar input from the LH front door and the key-in-ignition switch status. When the key is inserted into the ignition lock cylinder and the driver door is open or ajar, the SJB  sends the IC  a chime request message to sound the key-in-ignition warning chime.

• DTC B1352 (Ignition Key-In Circuit Failure) - an on-demand DTC that sets if the SJB  detects an open on the key-in-ignition switch input circuit or if the SJB  detects ignition START, RUN/START or RUN/ACC inputs without the key-in-ignition input.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Key-in-ignition switch (part of the ignition switch)
• SJB 
• IC