Pinpoint Test Ax : The Chime Always Sounds
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
- AX1 CHECK THE IPC (INSTRUMENT PANEL CLUSTER) FOR MESSAGE CENTER MESSAGES
- Ignition OFF.
- Ignition ON.
- Check the IPC and message center for illuminated warning indicator or message center displays.
Does the IPC have any RTT indicators illuminated or message center messages displayed?
Yes REPAIR all message center indication concerns first. REFER to Symptom Chart: Instrument Panel Cluster (IPC) . No GO to AX2 - AX2 CHECK THE EXTERIOR LIGHTING OPERATION
- Place the headlamp switch in the OFF position.
- Close all doors.
- Wait one minute.
- Observe the exterior lights.
Are the headlamps and parking lamps off?
Yes GO to AX3 No REFER to: Headlamps . or REFER to: Parking, Rear and License Plate Lamps . - AX3 CHECK THE INTERIOR LIGHTING OPERATION
- Open and close the driver door.
- Observe the interior lights.
Do the interior lights operate correctly from the driver door?
Yes GO to AX4 No REFER to: Interior Lighting . - AX4 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the BCM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to: Body Control Module (BCM) . No GO to AX5 - AX5 CHECK THE BCM (BODY CONTROL MODULE) INPUT PIDS FROM THE IGNITION SWITCH
- Using a diagnostic scan tool, view the BCM Parameter Identifications (PIDs).
- Select and monitor the BCM ignition switch (IGN_SW_ACC), (IGN_SW_RUN) and (IGN_SW_KEY_IN) Parameter Identifications (PIDs) while cycling the ignition switch through the ACC, OFF, and RUN states.
Do the BCM Parameter Identifications (PIDs) match the ignition switch position?
Yes Refer to IPC GUIDED ROUTINE TESTING -- NAVIGATOR . No DIAGNOSE the ignition switch outputs to the BCM. Refer to: Steering Wheel and Column Electrical Components .