Pinpoint Tests AO: The Key-In-Ignition Warning Chime Is Inoperative

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AO: The Key-In-Ignition Warning Chime Is Inoperative

Refer to Wiring Diagram Set 60, 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. 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 or short to ground 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



PINPOINT TEST AO: THE KEY-IN-IGNITION WARNING CHIME IS INOPERATIVE

NOTICE: 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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AO1 CHECK THE INTERIOR LIGHTS OPERATION


- Ignition OFF.
- Open then close the driver door while observing the interior lights.
- Do the interior lights operate correctly?

Yes
GO to AO2.

No
REFER to Lighting and Horns.

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AO2 RETRIEVE THE RECORDED DTCs FROM THE SJB SELF-TEST


- Check the recorded DTCs from the SJB self-test.
- Is DTC B1352 present?

Yes
GO to AO3.

No
GO to AO4.

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AO3 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 or short to ground. CLEAR the DTCs. REPEAT the self-test.

No
INSTALL a new ignition switch. REFER to Steering Column. CLEAR the DTCs. REPEAT the self-test.

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AO4 CHECK FOR CORRECT SJB OPERATION


- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. REFER to Body Control Systems. 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.

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