B1352 FORD - Ignition Key-In Circuit Failure
- Faulty Ignition Key-In Switch (Part of the ignition switch)
- Ignition Key-In Switch harness is open or shorted
- Ignition Key-In Switch circuit poor electrical connection
- Faulty Smart Junction Box (SJB)
- Engine Light ON (or Service Engine Soon Warning Light)
B1352 Ford DescriptionThe 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 through the circuit. 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 LH front door is open or ajar, the SJB sends the IC a chime request message to sound the key-in-ignition warning chime. The headlamps on warning chime sound when the driver door is opened with the ignition switch in the OFF position, the key is not in the ignition lock cylinder, and the headlamp switch is in the PARK or HEADLAMP ON position.
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