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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests


Pinpoint Test AN: 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 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 (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 SJB detects a key-in-ignition voltage and the LH front door is open or ajar, the SJB sends the IPC 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 if the SJB detects a short to voltage 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 warning switch (part of the ignition switch)
- SJB



PINPOINT TEST AN: 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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AN1 CHECK THE IPC ILLUMINATION


- Verify the IPC is not illuminated with the headlamp switch off.
- Does the IPC illumination operate correctly?

Yes
GO to AN2.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

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AN2 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 AN3.

No
GO to AN4.

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AN3 CHECK THE SJB IGNITION INPUT PIDs


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Select and monitor the SJB PIDs ignition ACC (IGN_A_ECU), ignition OFF (IGN_O_ECU), ignition RUN (IGN_R_ECU), and ignition START (IGN_S_ECU) while cycling the ignition from ACC, OFF, RUN and START.
- Do the SJB PIDs match the ignition mode?

Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.

No
REFER to Steering Column to diagnose the ignition outputs to the SJB.

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AN4 CHECK CIRCUIT CDC30 (BU/GY) FOR VOLTAGE


- Ignition OFF.
- Disconnect: SJB C2280b.
- Measure the voltage between the SJB C2280b-35, circuit CDC30 (BU/GY), harness side and ground.




- Is any voltage present?

Yes
GO to AN5.

No
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.

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AN5 CHECK CIRCUIT CDC30 (BU/GY) FOR A SHORT TO VOLTAGE


- Disconnect: Ignition Switch C250.
- Measure the voltage between the SJB C2280b-35, circuit CDC30 (BU/GY), harness side and ground.




- Is any voltage present?

Yes
REPAIR the circuit. TEST the system for normal operation.

No
INSTALL a new ignition switch. REFER to Steering Column. TEST the system for normal operation.

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