Diagnostic Aids
The daytime running lamp (DRL) system will not work if the parking brake is applied. The system is designed to work only when the engine is running and the parking brake is released. If the parking brake circuit is shorted to ground or the switch stays closed when the engine is running, the DRL system will not work.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Turn ON the headlamps with the headlamp switch. Do the headlamps work? | -- | Go to Step 3 | Go to Step 2 |
2 | Repair the regular headlamp system before completing this diagnostic table. Does the daytime running lamp (DRL) system work after the headlamps have been repaired? | -- | System OK | Go to Step 3 |
3 | Test fuse EF19. Is fuse EF19 blown? | -- | Go to Step 4 | Go to Step 5 |
4 |
Is the repair complete? | -- | System OK | -- |
5 |
Does the voltage equal the specified value? | 11-14 V | Go to Step 7 | Go to Step 6 |
6 | Repair the power supply circuit for fuse EF19. Is the repair complete? | -- | System OK | -- |
7 |
Is the voltage equal to the specified value? | 11-14 V | Go to Step 9 | Go to Step 8 |
8 | Repair the open circuit between fuse EF19 and terminal 1 of the DRL module connector. Is the repair complete? | -- | System OK | -- |
9 | With the DRL module still disconnected, use an ohmmeter to measure the resistance between ground and terminal 5 of the DRL module connector. Is the resistance equal to the specified value? | 0 ohms | Go to Step 11 | Go to Step 10 |
10 | Repair the circuit between ground and terminal 5 of the DRL module connector. Is the repair complete? | -- | System OK | -- |
11 |
Is the parking brake indicator lamp ON? | -- | Go to Step 12 | Go to Step 15 |
12 | Disconnect the electrical connector to the parking brake lever switch. Is the parking brake indicator lamp still ON? | -- | Go to Step 13 | Go to Step 14 |
13 | Repair the short to ground in the parking brake circuit. Is the repair complete? | -- | System OK | -- |
14 | Replace the parking brake lever switch. Is the repair complete? | -- | System OK | -- |
15 |
Is the voltage equal to the specified value? | 0 V | Go to Step 17 | Go to Step 16 |
16 | Repair the open between fuse F4 and terminal 6 of the DRL module. Is the repair complete? | -- | System OK | -- |
17 | Replace the DRL module. Refer to Daytime Running Lights (DRL) Control Module Replacement . Is the repair complete? | -- | System OK | -- |
