Step
| Action
| Value(s)
| Yes
| No
|
The BCM sounds the
headlamps on reminder when one or more of the following conditions are present:
| • | The drivers door is closed. |
| • | The headlamp switch is OFF. |
|
1
| Was the BCM Diagnostic System Check performed?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Body Control System
in Body Control System
|
2
|
- Ensure that the IP dimmer switch is off.
- Turn the ignition switch to RUN.
- Lower the driver's window in order to prevent lockout.
- Close the vehicle's doors.
Are the courtesy lights off?
| --
| Go to
Step 3
| Go to
Step 7
|
3
|
- Connect a Tech 2 scan tool to the Data Link Connector (DLC).
- Use the Tech 2 scan tool in order to monitor the park lamp off
input.
- While observing the Tech 2 scan tool, turn the headlamp switch
from OFF to HEAD and back to OFF.
Does the Tech 2 scan tool indicate that the park lamp off input is active
with the headlamp switch off?
| --
| Go to
Step 8
| Go to
Step 4
|
4
|
- Turn the headlamp switch OFF.
- Connect a test lamp.
- Backprobe between the BCM connector C1 terminal C2
and ground.
Does the test lamp light?
| --
| Go to
Step 8
| Go to
Step 5
|
5
|
- Disconnect the headlamp switch electrical connector.
- Connect a test lamp.
- Backprobe between the headlamp switch harness connector terminal E
and ground.
Does the test lamp light?
| --
| Go to
Step 6
| Go to
Step 9
|
6
|
- Disconnect the BCM connector C1.
- Use a DMM in order to measure the resistance between the BCM harness
connector C1 terminal C2 and the headlamp switch harness connector
terminal F.
Is the resistance measured less than the specified value?
| 2ohms
| Go to
Step 10
| Go to
Step 11
|
7
| The headlamps on reminder is on with the driver's door
closed due to a malfunction between the BCM and the driver's door lock
ajar switch. Refer to
Interior Lamps System Check
in Lighting Systems for further diagnosis.
Is the action complete?
| --
| Go to
Step 12
| --
|
8
|
- Replace the BCM. Refer to
Body Control Module Replacement
in Body Control System.
- Perform the Setup New BCM procedure. Refer to
Body Control Module (BCM) Programming/RPO Configuration
in Body Control
System.
Is the repair complete?
| --
| Go to
Step 12
| --
|
9
|
- Repair a poor connection in circuit 1340.
- Repair an open in circuit 1340.
Is the repair complete?
| --
| Go to
Step 12
| --
|
10
|
- Inspect the headlamp switch connection terminals E and
F for a poor connection.
- If the connection is OK, replace the headlamp switch assembly.
Refer to
Headlamp Switch Replacement
in Lighting Systems.
Is the repair complete?
| --
| Go to
Step 12
| --
|
11
|
- Repair a poor connection in circuit 1872.
- Repair an open in circuit 1872.
Is the repair complete?
| --
| Go to
Step 12
| --
|
12
|
- Turn the ignition switch to LOCK.
- Reinstall the connectors and the components that were removed.
- Check for BCM current DTCs. Refer to
Diagnostic Trouble Code (DTC) Displaying
in Body Control System.
Are there any BCM current DTCs present?
| --
| Go to
Diagnostic System Check - Body Control System
in Body Control System
| Go to
Audible Warnings System Check
|
