Pinpoint Test AP: The Key-In-Ignition Warning Chime Is Inoperative
Instrumentation, Message Center and Warning Chimes
Pinpoint Test AP: The Key-In-Ignition Warning Chime Is Inoperative
Normal Operation
The Instrument Panel Cluster (IPC) receives the key-in-ignition warning status from the Smart Junction Box (SJB) over the Medium Speed Controller Area Network (MS-CAN) communication bus.
The key-in-ignition warning switch is hardwired to the SJB (Smart Junction Box) through a single input circuit. When the key is inserted into the ignition lock cylinder, the key-in-ignition switch closes and supplies ground to the SJB (Smart Junction Box).
The SJB (Smart Junction Box) monitors the door ajar input from the LH front door and the key-in-ignition switch status. When the SJB (Smart Junction Box) detects a key-in-ignition ground and the LH front door is open or ajar, the SJB (Smart Junction Box) sends the IPC (Instrument Panel Cluster) 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 in the SJB (Smart Junction Box) if the SJB (Smart Junction Box) detects an open on the key-in-ignition switch input circuit or if the SJB (Smart Junction Box) detects ignition START, RUN/START or RUN/ACC inputs without the key-in-ignition input.
This pinpoint test is intended to diagnose the following:
- Interior lighting concern
- Wiring, terminals or connectors
- Key-in-ignition switch
- SJB (Smart Junction Box)
- IPC (Instrument Panel Cluster)
PINPOINT TEST AP : THE KEY-IN-IGNITION WARNING CHIME IS INOPERATIVE
AP1 CHECK THE SAFETY BELT WARNING CHIME OPERATION
- Ignition OFF.
- Ignition ON.
- Monitor the safety belt warning chime when the ignition is transitioned from OFF to RUN for 6 seconds.
Does the safety belt warning chime operate for approximately 6 seconds?
Yes
GO to AP2.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.
AP2 CHECK THE COURTESY LAMPS OPERATION
- Ignition ON.
- Open then close the LH front door while observing the courtesy lamps.
Do the courtesy lamps operate correctly?
Yes
GO to AP3.
No
REFER to Lighting and Horns.
AP3 RETRIEVE THE RECORDED DTCs FROM THE SJB (Smart Junction Box) SELF-TEST
- Check for recorded DTCs from the SJB (Smart Junction Box) self-test.
Is DTC B1352 present?
Yes
GO to AP4.
No
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.
AP4 CHECK THE KEY-IN-IGNITION SWITCH INPUT
- Ignition OFF.
- Disconnect: Clockspring C218B.
- Connect a fused jumper wire between the clockspring C218B-10, circuit CDC30 (BU/GY), harness side and ground.
- Open the driver door.
Does the key-in-ignition warning chime sound?
Yes
REMOVE the jumper wire. GO to AP5.
No
REMOVE the jumper wire. GO to AP6.
AP5 CHECK THE KEY-IN-IGNITION SWITCH INPUT CIRCUIT FOR AN OPEN
- Disconnect: Key-In-Ignition Switch.
- Measure the resistance between the lower clockspring pin 10, component side and the key-in-ignition switch, component side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new key-in-ignition switch. CLEAR the DTCs. REPEAT the self-test.
No
REPAIR the circuit for an open. TEST the system for normal operation.
AP6 CHECK THE KEY-IN-IGNITION SWITCH INPUT CIRCUIT TO THE SJB (Smart Junction Box) FOR AN OPEN
- Disconnect: SJB (Smart Junction Box) C2280C.
- Measure the resistance between the SJB (Smart Junction Box) C2280C-7, circuit CDC30 (BU/GY), harness side and the clockspring C218B-10, circuit CDC30 (BU/GY), harness side.
Is the resistance less than 5 ohms?
Yes
GO to AP7.
No
REPAIR circuit CDC30 (BU/GY) for an open. TEST the system for normal operation.
AP7 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION
- Disconnect the SJB (Smart Junction Box) connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the SJB (Smart Junction Box) connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new SJB (Smart Junction Box). TEST the system for normal operation.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.