Daytime running lights (vehicles before 08.2001) — Pinpoint tests

A1: CHECK LOW BEAM

1 Drive the ON position.

2 Turn the light switch to "DOWN LIGHT".

3 Check the low beam headlights.

• Is the dipped beam on?

→ Yes

Go to A2

→ No

See Section 417-01 for more information.

A2: CHECK POWER SUPPLY OF DAYTIME WORK LIGHT RELAY (DRL)

1 Enter the OFF position.

2 Disconnect Daytime running lamp relay (DRL) - C1012.

3 Measure the voltage between pin 3 of the C1012 Daytime Work Lamp Relay (DRL), electrical circuit 30-LE7 (red) And "weight".

• Does the battery voltage register?

→ Yes

Go to A3

→ No

REPAIR open circuit between fuse F22 and daytime running lamp relay (DRL), using wiring diagrams. Check if the system is working properly

A3: INSPECT DAYTIME WORK LIGHT RELAY CONTROL CIRCUIT (DRL)

1 Drive the ON position.

2 Measure the voltage between pin 1 of the C1012 Daytime Work Lamp Relay (DRL) And "weight".

• Does the battery voltage register?

→ Yes

Go to A4

→ No

Go to A6

A4: CHECK CONNECTION WITH "MASS" DAYTIME WORK LIGHT RELAY (DRL)

1 Enter the OFF position.

2 Measure the resistance between pin 2 of the C1012 Daytime Work Lamp Relay (DRL) And "weight".

• Is the resistance less than 2 ohms?

→ Yes

Go to A5

→ No

REPAIR open circuit (to her) between daytime working lamp relays (DRL) And "weight" G1 using the wiring diagrams. Check if the system is working properly

A5: INSPECT DAYTIME WORK LIGHT RELAY (DRL)

1 Connect the jumper wire to connector C1012 of the daytime running lamp relay (DRL), between pin 3, electrical circuit 30-LE7 (red) and pin 5, electric circuit (to her) 15S-LE8 (green/red), 15S-DC19 (green/blue).

2Check the headlights.

• Are the daytime running lights on?

→ Yes

INSTALL a new daytime running lamp relay (DRL). Check if the system is working properly

→ No

REPAIR open circuit (to her) 15S-LE8 (green/red), between daytime running lamp relay (DRL) and the S120 connection using the wiring diagrams. If necessary, INSTALL a new daytime running lamp resistance. Check if the system is working properly

A6: CHECK THE LIGHT SWITCH

1 Enter the OFF position.

2 Disconnect the Light Switch - C320.

3 Measure the resistance between pin 4 of the C320 light switch, circuit 15S-LE6 (green/yellow), wiring side, and pin 1 C1012 daytime running lamp relay (DRL), electrical circuit 15S-LE6 (green/yellow).

• Is the resistance less than 2 ohms?

→ Yes

INSPECT the light switch as described in item test: Refer to Section 417-01 for more information. If necessary, INSTALL the new element. Check if the system is working properly

→ No

REPAIR open circuit (to her) between pin 4 C320 of the light switch and the daytime running lamp relay (DRL), using wiring diagrams. Check if the system is working properly

B1: INSPECT DAYTIME WORK LIGHT RELAY (DRL)

1 Enter the OFF position.

2 Disconnect Daytime running lamp relay (DRL) - C1012.

3Check the headlights.

• Are the daytime running lights on?

→ Yes

Go to B5

→ No

Navigate to B2

B2: INSPECT DAYTIME WORK LIGHT RELAY CONTROL CIRCUIT (DRL)

1 Measure the voltage between pin 1 of the C1012 Daytime Work Lamp Relay (DRL), electrical circuit 15S-LE6 (green/yellow) And "weight".

• Does the battery voltage register?

→ Yes

Go to B3

→ No

INSTALL a new daytime running lamp relay (DRL). Check if the system is working properly

B3: INSPECT DAYTIME WORK LIGHT RELAY CONTROL CIRCUIT (DRL) SHORT TO POWER SUPPLY

1 Disconnect the Light Switch - C320.

2 Measure the voltage between pin 1 of the C1012 Daytime Work Lamp Relay (DRL), electrical circuit 15S-LE6 (green/yellow) And "weight".

• Does the battery voltage register?

→ Yes

REPAIR short to circuit power supply (to her), connected to pin 1 C1012 daytime running lamp relay (DRL), using wiring diagrams. Check if the system is working properly

→ No

Go to B4

B4: CHECK LIGHT SWITCH

1 Measure voltage between pin 8 C320 of lighting switch, circuit 15-LE29 (green/black), And "weight".

• Does the battery voltage register?

→ Yes

REPAIR short to circuit power supply (to her), connected to fuse F61 using the wiring diagrams. Check if the system is working properly

→ No

INSPECT the light switch as described in item test: Refer to Section 417-01 for more information. If necessary, INSTALL the new element. Check if the system is working properly

B5: CHECK THE POWER SUPPLY OF THE DAYTIME WORK LIGHTS FOR A SHORT TO THE POWER SUPPLY

1 Disconnect Fuse F19 (BJB).

2Check the headlights.

• Are the daytime running lights on?

→ Yes

REPAIR short to circuit power supply (to her) 15S-LE8 (green/red) and 15S-DC19 (green/blue), connected to the daytime working lamp relay (DRL), using wiring diagrams. Check if the system is working properly

→ No

Go to B6

B6: CHECK POWER SUPPLY TO PARKING LIGHTS (DRL) SHORT TO POWER SUPPLY

1 Connect Fuse F19 (BJB).

2 Detach Light Switch (C320).

3Check the headlights.

• Are the daytime running lights on?

→ Yes

REPAIR short to circuit power supply (to her) 15S-LE29 (green/black), connected to fuse F19 using the wiring diagrams. Check if the system is working properly

→ No

See Section 417-01 for more information. Clearance and parking lights.

C1: DETERMINE STATE

1 Turn the light switch to "PARKING LIGHTS".

2 Check parking lights.

• Are the parking lights on?

→ Yes

Go to C2

→ No

See Section 417-01 for more information.

C2: CHECK FUSE F19

1 Enter the OFF position.

2 CHECK Fuse F19 (BJB).

3 CHECK FUSE F19 (10 A)

• Is the fuse good?

→ Yes

Go to C3

→ No

Install new fuse F19 (10 A). If the fuse blows again, LOCATE and REPAIR the short circuit using the wiring diagrams. Check if the system is working properly

C3: CHECK POWER SUPPLY OF F19 FUSE

1 Connect Fuse F19 (BJB).

2 Drive the ON position.

3 Measure voltage between fuse F19 (BJB) And "weight".

• Does the battery voltage register?

→ Yes

Go to C4

→ No

REPAIR open circuit (to her) 15S-DC19 (green/blue) between daytime working lamp relays (DRL) and fuse F19 using the wiring diagrams. Check if the system is working properly

C4: CHECK CIRCUIT TO LIGHT SWITCH FOR OPEN

1 Enter the OFF position.

2 Disconnect the Light Switch - C320.

3 Disconnect Daytime running lamp relay (DRL) - C1012.

4 Connect the jumper wire to connector C1012 of the daytime working lamp relay (DRL) between pin 3, electrical circuit 30-LE7 (red), and pin 5, electrical circuit (to her) 15S-LE8 (green/red), 15S-DC19 (green/blue).

5 Drive the ON position.

6 Measure voltage between pin 15 C320 of light switch, circuit 15S-LE29 (green/black), from the wiring side and "weight".

• Does the battery voltage register?

→ Yes

TEST the light switch as described in the item checks: Refer to Section 417-01 for more information. If necessary, INSTALL the new element. Check if the system is working properly

→ No

REPAIR open circuit (to her) 15S-LE29 (green/black) between fuse F19 (BJB) and light switch using the wiring diagrams. Check if the system is working properly