Step
| Action
| Yes
| No
|
Schematic Reference:
Headlights/Daytime Running Lights (DRL) Schematics
|
1
| Did you perform
the Lighting Diagnostic System Check?
|
Go to Step
2
| Go to
Diagnostic System Check - Lighting Systems
|
2
| Verify the fault
is present.
Does the system operate normally?
| Go to
Testing for Electrical Intermittents
in Wiring Systems
|
Go to Step 3
|
3
|
- Ensure the headlamp switch is in the AUTO position.
- Ensure the ambient light sensor is not covered or has no obstruction
to daylight.
Did you find and correct the condition?
|
Go to Step 11
|
Go to Step 4
|
4
|
- Turn OFF the ignition.
- Remove and inspect the IGN E and the daylight running lamps (DRL)
fuses.
Is either fuse open?
|
Go to Step
5
|
Go to Step 6
|
5
|
- Replace the fuse(s) as necessary.
- Test the DRL relay output circuit for a short to ground. Refer
to
Testing for Short to Ground
and
Wiring Repairs
in Wiring Systems.
Did you find and correct the condition?
|
Go to Step 11
|
Go to Step 6
|
6
|
- Install the fuses.
- Remove the DRL relay.
- Using the J 35616
adaptor, connect a fused jumper wire between the fused battery positive
circuit and the DRL relay output circuit at the relay socket.
Does the DRL illuminate?
|
Go to Step
7
|
Go to Step 9
|
7
|
- Using the J 35616
adaptor, connect a test lamp between the fused ignition positive
voltage circuit and the DRL relay control circuit.
- Turn ON the ignition with the engine OFF.
- With the scan tool, command the daylight running lamps (DRL) relay
on.
Does the test lamp illuminate?
|
Go to Step
8
|
Go to Step 10
|
8
| Repair the
open in the DRL relay control circuit between the engine wiring harness junction
block and the BCM. Refer to
Wiring Repairs
in Wiring System.
If no open is found, replace the BCM. Refer to
Body Control Module Replacement
in Body Control System.
Did you complete the repair?
|
Go to Step
11
| --
|
9
|
- Inspect DRL lamp(s) for open filaments. Replace the lamps as needed.
- Repair the open in the DRL relay output circuit between the engine
wiring harness junction block and the component(s) or the open DRL ground
circuit. Refer to
Wiring Repairs
in Wiring Systems.
Did you complete the repair?
|
Go to Step
11
| --
|
10
| Replace the DRL
relay. Refer to
Daytime Running Lamps (DRL) Relay Replacement
.
Did you complete the replacement?
|
Go to Step
11
| --
|
11
| Operate the system
in order to verify the repair.
Did you correct the condition?
| System OK
|
Go to Step
3
|
