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Daytime Running Lamps Circuit Diagnosis

WARNING: This page is about a different car, the 2005 Suzuki Reno and 2005 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.

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 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.

Daytime Running Lamps Do Not Turn ON 

DIAGNOSTIC INFORMATION AND PROCEDURES

Step Action Value(s) Yes No
1 Turn the headlamps ON.
Do the headlamps, parking lamps, taillamps, 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 DRL system work after the headlamps, exterior lamps, and instrument lamp systems have been repaired?		 - System OK Go to Step 3
3 Check fuses F6 and Ef28.
Is fuse F6 and Ef28 blown?		 - Go to Step 4 Go to Step 5
4
  1. Check for a short circuit and repair if necessary.
  2. Replace any blown fuse.
Is the repair complete?		 - System OK -
5
  1. Turn the ignition ON.
  2. Check the voltage at fuses F6 and Ef28.
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 F6 and Ef28.
Is the repair complete?		 - System OK -
7
  1. Disconnect the electrical connector from the DRL module.
  2. Turn the ignition ON.
  3. Check the voltage at terminal 3 and 6 of the DRL module.
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 F6 and terminal 3 of the DRL module connector.
Is the repair complete?		 - System OK -
9 With the electrical connector still disconnected from the DRL module, check the voltage at terminal 6 of the DRL module.
Is the voltage equal to the specified value?		 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.
Is the repair complete?		 - System OK -
11 With the DRL module still disconnected, use an ohmmeter to check the resistance between G203 and terminal 4 of the DRL module connector.
Is the resistance equal to the specified value?		 0 Go to Step 13 Go to Step 12
12 Repair the circuit between G203 and terminal 4 of the DRL module connector.
Is the repair complete?		 - System OK -
13
  1. Release the parking brake.
  2. Turn the ignition switch ON.
  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.
Is the repair complete?		 - System OK -
16 Replace the parking brake lever switch.
Is the repair complete?		 - System OK -
17 Replace the DRL module.
Is the repair complete?		 - System OK -
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