Pinpoint Tests AC: The Chime Sounds When The Driver Door Is Ajar (No Key In Ignition And Headlamps Off)

Instrumentation and Warning Chimes

Pinpoint Test

Pinpoint Test AC: The Chime Sounds When The Driver Door Is Ajar (No Key In Ignition And Headlamps Off)

Refer to Wiring Diagram Set 60, Instrument Cluster for schematic and connector information. Diagrams By Number

Normal Operation

The key-in-ignition warning chime sounds when the driver door is opened with the key in the ignition lock cylinder, and the ignition switch is in the OFF or ACC position. The Instrument Cluster (IC) uses the driver door ajar status, ignition RUN/START position status, or operational mode of the cluster, and the key-in-ignition status to determine when to sound the chime. When the ignition key is inserted in the ignition lock cylinder, a ground signal is sent to the IC through the clockspring and the key-in-ignition switch. The IC then looks at the ignition switch position by monitoring for a voltage applied to the run/start input circuit. If the cluster does not see a voltage on the run/start circuit and the key-in-ignition is grounded, it looks to see if the driver door ajar input is grounded through the door ajar switch. If all 3 of these conditions exist, the IC sounds the key-in-ignition warning chime.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Key-in-ignition warning switch
- IC



PINPOINT TEST AC: THE CHIME SOUNDS WHEN THE DRIVER DOOR IS AJAR (NO KEY IN IGNITION AND HEADLAMPS OFF)

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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AC1 CHECK THE KEY-IN-IGNITION SWITCH OPERATION


- Ignition OFF.
- Disconnect: Clockspring C218a.
- Open the driver door and monitor the key-in-ignition warning chime.
- Does the chime continue to sound?

Yes
GO to AC2.

No
GO to AC3.

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AC2 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR A SHORT TO GROUND


- Ignition OFF.
- Disconnect: IC C220a.
- Measure the resistance between the IC C220a-4, circuit CDC30 (BU/GY), harness side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
GO to AC4.

No
REPAIR circuit CDC30 (BU/GY) for a short to ground. TEST the system for normal operation.

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AC3 CHECK THE KEY-IN-IGNITION WARNING SWITCH CIRCUIT FOR A SHORT TO GROUND


- Disconnect: Key-In-Ignition Warning Switch.
- Ignition OFF.
- Measure the resistance between the lower clockspring pin 10, component side and ground.




- Is the resistance greater than 10,000 ohms?

Yes
INSTALL a new key-in-ignition warning switch. REFER to Key-In-Ignition Warning Switch Key-In-Ignition Warning Switch. TEST the system for normal operation.

No
REPAIR the circuit for a short to ground. TEST the system for normal operation.

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AC4 CHECK FOR CORRECT IC OPERATION


- Disconnect all the IC connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the IC 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 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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