Pinpoint Test 7: DTC B1352 - Ignition Key-In Circuit Failure,The Ignition Key Cannot Be Removed

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PINPOINT TEST 7: DTC B1352 - IGNITION KEY-IN CIRCUIT FAILURE, THE IGNITION KEY CANNOT BE REMOVED FROM THE IGNITION CYLINDER OR THE IGNITION KEY CAN BE REMOVED FROM THE IGNITION CYLINDER REGARDLESS OF GEAR SELECTOR POSITION

Normal Operation

When the ignition key is inserted into the ignition lock cylinder, an internal switch in the ignition switch assembly closes and battery voltage is sent to the smart junction box (SJB) along circuit (L/GY).When the gear selector is placed in a position other than PARK, the key release interlock actuator (part of the ignition switch assembly) prevents the key from being removed from the ignition switch. The key release interlock actuator receives fused battery voltage from smart junction box (SJB) fuse 27 (20A) along circuit (L/R). Ground for the actuator is provided along circuit (W/BR), through the park detection switch (part of the gear selector assembly) and then along circuit (B/G). When the gear selector lever is placed in a position other than PARK, the park detection switch closes and connects circuit (W/BR) to circuit (B/G), this grounds the key release actuator and prevents the key from being removed from the ignition switch.

- DTC B1352 Ignition Key-In Circuit Failure - When the battery voltage is between 10 volts and 15.5 volts and the ignition switch is in the RUN position, if the ignition key is removed from the ignition switch or if there is an open in circuit (L/GY), DTC B1352 will be set.

Possible Causes
- Wiring, terminals or connectors
- Ignition switch
- Park detection switch (part of the gear selector lever)
- SJB

Diagnostic Procedure

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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