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Home >> Chevrolet >> 2007 >> Optra5 LS, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting >> Diagnostic Information and Procedures >> Daytime Running Lamps (DRL) Inoperative (2.0L) >> Diagnostic Aids

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 the headlamps ON.
Do the headlamps, parking lamps, tail lamps, and instrument lamps work?		 - Go to Step 3  Go to Step 2 
2 Repair the regular headlamp system before completing this diagnostic table.
Does the daytime running lamps (DRL) system work after the headlamps, exterior lamps, and instrument lamp systems have been repaired?		 - System OK Go to Step 3 
3 Inspect fuses F6 (NA), Ef28 (Scandinavian).
Is fuse F6, Ef28 open?		 - Go to Step 4  Go to Step 5 
4
  1. Inspect for a short circuit and repair it if necessary.
  2. Replace any open fuse.
Is the repair complete?		 - System OK -
5
  1. Turn the ignition ON, with the engine OFF.
  2. Measure the voltage at fuses F6 (NA), Ef28 (Scandinavian).
Does the voltage measure within the specified range?		 11-14 V Go to Step 7  Go to Step 6 
6 Repair the power supply circuit for fuses F6 (NA), Ef28 (Scandinavian).
Did you complete the repair?		 - System OK -
7
  1. Disconnect the electrical connector from the DRL module.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure the voltage at terminal 3 of the DRL module.
Does the voltage measure within the specified range?		 11-14 V Go to Step 9  Go to Step 8 
8 Repair the open circuit between fuse F6 and terminal 3 of the DRL module connector.
Did you complete the repair?		 - System OK -
9 With the electrical connector still disconnected from the DRL module, measure the voltage at terminal 6 of the DRL module.
Does the voltage measure within the specified range?		 11-14 V Go to Step 11  Go to Step 10 
10 Repair the open circuit between the headlamp switch terminal 4 and G201 connector.
Did you complete the repair?		 - System OK -
11 With the DRL module still disconnected, use an ohmmeter to measure the resistance between G203 and terminal 4 of the DRL module connector.
Is the resistance equal to the specified value?		 0 Ω Go to Step 13  Go to Step 12 
12 Repair the circuit between G203 and terminal 4 of the DRL module connector.
Did you complete the repair?		 - System OK -
13
  1. Release the parking brake.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the parking brake indicator lamp.
Is the parking brake indicator lamp ON?		 - Go to Step 14  Go to Step 17 
14 Disconnect the electrical connector to the parking brake lever switch.
Is the parking brake indicator lamp still ON?		 - Go to Step 15  Go to Step 16 
15 Repair the wire short to ground in the parking brake circuit.
Did you complete the repair?		 - System OK -
16 Replace the parking brake lever switch.
Did you complete the replacement?		 - System OK -
17 Replace the DRL module. Refer to Daytime Running Lights (DRL) Control Module Replacement .
Did you complete the replacement?		 - System OK -
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