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

Instrumentation, Message Center and Warning Chimes

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


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 is hardwired to the SJB (Smart Junction Box) through a single input circuit. When the key is inserted into the ignition lock cylinder, the key-in-ignition switch closes and supplies ground to the SJB (Smart Junction Box).

The SJB (Smart Junction Box) monitors the door ajar input from the LH front door and the key-in-ignition switch status. When the SJB (Smart Junction Box) detects a key-in-ignition ground and the LH front door is open or ajar, the SJB (Smart Junction Box) sends the IPC (Instrument Panel Cluster) 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 (Smart Junction Box) if the SJB (Smart Junction Box) detects an open on the key-in-ignition switch input circuit or if the SJB (Smart Junction Box) 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

- SJB (Smart Junction Box)

PINPOINT TEST AO : 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.

AO1 CHECK THE IPC (Instrument Panel Cluster) ILLUMINATION

- Verify the IPC (Instrument Panel Cluster) is not illuminated with the headlamp switch off.

Does the IPC (Instrument Panel Cluster) illumination operate correctly?

Yes
GO to AO2.

No
REFER to Instrument Panel, Gauges and Warning Indicators.

AO2 RETRIEVE THE RECORDED DTCs FROM THE SJB (Smart Junction Box) SELF-TEST

- Check for recorded DTCs from the SJB (Smart Junction Box) self-test.

Is DTC B1352 present?

Yes
GO to AO3.

No
GO to AO4.

AO3 CHECK THE SJB (Smart Junction Box) IGNITION INPUT PIDs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.

- Select and monitor the SJB (Smart Junction Box) 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 (Smart Junction Box) PIDs match the ignition mode?

Yes
GO to AO7.

No
REFER to Steering Column to diagnose the ignition outputs to the SJB (Smart Junction Box).

AO4 CHECK THE SJB (Smart Junction Box) KEY-IN-IGNITION CIRCUIT FOR A SHORT TO GROUND

- Ignition OFF.

- Remove the key from the ignition lock cylinder.

- Disconnect: SJB (Smart Junction Box) C2280B.

- Measure the resistance between the SJB (Smart Junction Box) C2280C-7, circuit CDC30 (BU/GY), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to AO7.

No
GO to AO5.

AO5 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR A SHORT TO GROUND

- Disconnect: Clockspring C218B.

- Measure the resistance between the SJB (Smart Junction Box) C2280C-7, circuit CDC30 (BU/GY), harness side and ground.





Is the resistance greater than 10,000 ohms?

Yes
GO to AO6.

No
REPAIR the circuit. TEST the system for normal operation.

AO6 CHECK THE KEY-IN-IGNITION SWITCH INPUT CIRCUIT FOR AN OPEN

- Disconnect: Key-In-Ignition Switch.

- Measure the resistance between the lower clockspring pin 10, component side and ground.





Is the resistance less than 5 ohms?

Yes
INSTALL a new key-in-ignition switch. CLEAR the DTCs. REPEAT the self-test.

No
REPAIR the circuit for an open. TEST the system for normal operation.

AO7 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Disconnect the SJB (Smart Junction Box) connector.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect the SJB (Smart Junction Box) 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 SJB (Smart Junction Box). 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.