Pinpoint Tests AK: The Key-In-Ignition Warning Chime Is Inoperative
Instrumentation, Message Center and Warning Chimes
Pinpoint Tests
Pinpoint Test AK: The Key-In-Ignition Warning Chime Is Inoperative
Refer to Wiring Diagram Set 60 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Instrument Cluster for schematic and connector information. Diagrams By Number
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 through circuit CDC30 (BU/GY). 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 CDC30 (BU/GY) 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
PINPOINT TEST AK: THE KEY-IN-IGNITION WARNING CHIME IS INOPERATIVE
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AK1 CHECK THE SAFETY BELT WARNING CHIME OPERATION
- Ignition OFF.
- Ignition ON.
- Monitor the safety belt warning chime when the ignition switch is transitioned from OFF to RUN for 6 seconds.
- Does the safety belt warning chime operate for approximately 6 seconds?
Yes
GO to AK2.
No
INSTALL a new IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). TEST the system for normal operation.
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AK2 CHECK THE DOOR AJAR WARNING INDICATOR OPERATION
- Ignition ON.
- Open then close the LH front door while observing the door ajar warning indicator in the IC message center or the integrated display.
- Does the door ajar warning indicator operate correctly?
Yes
GO to AK3.
No
Go To Pinpoint Test M. Pinpoint Test M: The Door Ajar Warning Indicator Is Never/Always On
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AK3 RETRIEVE THE RECORDED DTCs FROM THE SJB SELF-TEST
- Check for recorded DTCs from the SJB self-test.
- Is DTC B1352 present?
Yes
GO to AK4.
No
INSTALL a new SJB. TEST the system for normal operation.
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AK4 CHECK THE IGNITION SWITCH
- Disconnect: Ignition Switch C250.
- Carry out the ignition switch component test.
- Is the ignition switch OK?
Yes
REPAIR circuit CDC30 (BU/GY) for an open. CLEAR the DTCs. REPEAT the self-test.
No
INSTALL a new ignition switch. CLEAR the DTCs. REPEAT the self-test.
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