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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AH: 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

When the key is inserted into the ignition lock cylinder, the key-in-ignition switch (part of the ignition switch) closes, providing a voltage signal to the Instrument Cluster (IC). The door ajar status is communicated to the IC from the Smart Junction Box (SJB) through the Medium Speed Controller Area Network (MS-CAN). If the IC detects that the ignition switch is in the OFF or ACC position, the key is inserted in the ignition lock cylinder, and the SJB communicates to the IC that the driver door is ajar, the key-in-ignition warning chime sounds.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Door ajar indication concern
- Key-in-ignition switch (part of the ignition switch)
- IC



PINPOINT TEST AH: 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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AH1 CHECK THE DOOR AJAR INDICATOR


- Make sure all the doors are closed.
- While observing the door ajar warning indicator, open the driver door.
- Is the door ajar warning indicator illuminated with the driver door open?

Yes
GO to AH2.

No
GO to Pinpoint Test S. Pinpoint Test S: The Door Ajar Warning Indicator Is Never/Always On

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AH2 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE


- Ignition OFF.
- Disconnect: IC C220.
- Place the key into the ignition cylinder.
- Measure the voltage between the IC C220-14, circuit CDC30 (BU/GY), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to AH4.

No
GO to AH3.

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AH3 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR AN OPEN


- Disconnect: Ignition Switch C250.
- Measure the resistance between the IC C220-14, circuit CDC30 (BU/GY), harness side and the ignition switch C250-5, circuit CDC30 (BU/GY), harness side.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new ignition switch. REFER to Steering Column. CLEAR the DTCs. REPEAT the self-test.

No
REPAIR circuit CDC30 (BU/GY) for an open. CLEAR the DTCs. REPEAT the self-test.

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AH4 CHECK FOR CORRECT IC OPERATION


- Disconnect the IC connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the IC 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 IC. REFER to Instrument Cluster (IC) Instrument Cluster (IC). 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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