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

Refer to Wiring Diagram Set 13, Power Distribution/SJB 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 LH front door is open or ajar, the SJB sends the IC a chime request message to sound the key-in-ignition warning chime.

The SJB receives the headlamp switch status from the headlamp switch and the LH front door ajar status from the LH front door ajar switch through hardwired circuitry. The headlamps on warning chime sounds when the LH front door is opened with the ignition switch in the OFF position, the key is not in the ignition lock cylinder, and the headlamp switch is in the PARK or HEADLAMPS ON position. The SJB communicates the headlamp on chime request to the IC based on headlamp or parking lamp and driver door inputs. The autolamps feature must not be selected for the headlamps on warning chime to operate.

- 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 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 AK: 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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AK1 CHECK THE IC ILLUMINATION


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

Yes
GO to AK2.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

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AK2 RETRIEVE THE RECORDED DTCs FROM THE SJB SELF-TEST


- Check the recorded DTCs from the SJB self-test.
- Are any DTCs present?

Yes
For DTC B1352, GO to AK3.

For all other DTCs, REFER to Body Control Systems.

No
GO to AK4.

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AK3 CHECK THE SJB INPUT PIDs FROM THE IGNITION SWITCH


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

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 switch outputs to the SJB.

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AK4 CHECK THE SJB KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE


- Ignition OFF.
- Disconnect: SJB C2280B.
- Remove the ignition key from the ignition lock cylinder.
- Measure the voltage between the SJB C2280B-35, circuit CDC30 (BU/GY), harness side and ground.




- Is any voltage present?

Yes
GO to AK5.

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

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AK5 CHECK THE SJB KEY-IN-IGNITION INPUT CIRCUIT 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 circuit CDC30 (BU/GY) for a short to voltage. 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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