Pinpoint Test AL: The Key-In-Ignition Warning Chime Is Inoperative
Instrumentation, Message Center and Warning Chimes
Pinpoint Test AL: The Key-In-Ignition Warning Chime Is Inoperative
Refer to Wiring Diagram Set 60, Instrument Panel Cluster for schematic and connector information Electrical Diagrams.
Normal Operation
The Instrument Panel Cluster (IPC) receives the key-in-ignition warning chime command from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN). The BCM (Body Control Module) monitors the door ajar input from the LH front door and the key-in-ignition switch status.
On vehicles without Intelligent Access (IA), the key-in-ignition warning switch (part of the ignition switch) is hardwired to the BCM (Body Control Module). When the key is inserted into the ignition lock cylinder, the key-in-ignition switch closes, supplying voltage to the BCM (Body Control Module).
On vehicles with IA (Intelligent Access), the BCM (Body Control Module) monitors the ignition start/stop button and determines the ignition mode. When the ignition is in ACC, the BCM (Body Control Module) assumes a key-in-ignition state.
When the BCM (Body Control Module) determines a key-in-ignition state with the LH front door open or ajar, the BCM (Body Control Module) sends the IPC (Instrument Panel Cluster) a chime request message to sound the key-in-ignition warning chime.
- DTC B10F1:14 (Key In Switch: Circuit Short To Ground or Open)- a continuous and on-demand DTC that sets if the BCM (Body Control Module) detects an open on the key-in-ignition switch input circuit or if the BCM (Body Control Module) detects ignition START, RUN/START or RUN/ACC inputs without the key-in-ignition input.
This pinpoint test is intended to diagnose the following:
- Interior lighting concern
- Wiring, terminals or connectors
- Key-in-ignition warning switch (part of the ignition switch) (without IA (Intelligent Access))
- BCM (Body Control Module)
- IPC (Instrument Panel Cluster)
PINPOINT TEST AL : THE KEY-IN-IGNITION WARNING CHIME IS INOPERATIVE
AL1 CHECK THE SAFETY BELT WARNING CHIME OPERATION
- Ignition OFF.
- Ignition ON.
- Monitor the safety belt warning chime when the ignition switch is transitioned from OFF to RUN for 6 seconds.
Does the safety belt warning chime operate for approximately 6 seconds?
Yes
GO to AL2.
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.
AL2 CHECK THE INTERIOR LAMPS OPERATION
- Open and close the driver door.
- Observe the interior lamps.
Do the interior lamps operate correctly from the driver door?
Yes
GO to AL3.
No
REFER to Lighting and Horns.
AL3 RETRIEVE THE RECORDED DTCs FROM THE BCM (Body Control Module) SELF-TEST
- Check the recorded DTCs from the BCM (Body Control Module) self-test.
Is DTC B10F1:14 present?
Yes
GO to AL4.
No
GO to AL6.
AL4 CHECK THE KEY-IN-IGNITION INPUT CIRCUIT FOR VOLTAGE
- Ignition OFF.
- Insert the key into the ignition cylinder.
- Disconnect: BCM (Body Control Module) C2280B.
- Measure the voltage between the BCM (Body Control Module) C2280B-34, circuit CDC30 (BU/GY), harness side and ground.
Is the voltage greater than 10 volts?
Yes
GO to AL6.
No
GO to AL5.
AL5 CHECK THE IGNITION SWITCH
- Ignition OFF.
- Disconnect: Ignition Switch C250.
- Carry out the ignition switch component test.
Is the ignition switch OK?
Yes
REPAIR circuit CDC30 (BU/GY) for an open. CLEAR the DTCs. REPEAT the self-test.
No
INSTALL a new ignition switch. CLEAR the DTCs. REPEAT the self-test.
AL6 CHECK FOR CORRECT BCM (Body Control Module) OPERATION
- Disconnect all the BCM (Body Control Module) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM (Body Control Module) 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 BCM (Body Control Module). 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.