Headlight range adjustment (up to 08.2001) — Pinpoint tests

O1: IDENTIFY THE STATE IN WHICH THE FAULT IS APPEARING.

1 Drive the ON position.

2 Turn the light switch to "DOWN LIGHT".

3 Adjust the headlight range adjustment.

• Are both headlights not adjustable?

→ Yes

Go to O6

→ No

Left headlight not adjustable: Go to O2

Right headlight not adjustable: Go to O4

O2: INSPECT LEFT HEADLIGHT CORRECTION CONTROL CIRCUIT

1 Enter the OFF position.

2 Disconnect Headlight, left side - C835.

3 Drive the ON position.

4 Turn the light switch to "DOWN LIGHT".

5 Measure the voltage between pin 2 of C835 left headlight circuit 64-LE45 (blue), on the wiring harness side, and "weight".

• Is voltage being registered?

→ Yes

Go to O3

→ No

REPAIR open circuit 64-LE45 (blue) between connection S106 and the left headlight using the wiring diagrams. Check the correct operation of the system.

O3: INSPECT ELECTRICAL CIRCUITS TO HEADLIGHT ADJUSTMENT MOTOR, LEFT

1 Enter the OFF position.

2 Measure the resistance of all circuits between the headlight beam leveling motor connector C840, harness side, and the corresponding left headlight pin, C835, component side.

• Is the resistance less than 2 ohms in each case?

→ Yes

Check the headlight beam leveling motor for mechanical damage. If necessary, INSTALL the new element. Check the correct operation of the system.

→ No

REPAIR the relevant circuit using the wiring diagrams. Check the correct operation of the system.

O4: INSPECT HEADLIGHT CORRECTION CONTROL CIRCUIT RIGHT SIDE

1 Enter the OFF position.

2 Disconnect Headlight, right side - C834.

3 Drive the ON position.

4 Turn the light switch to "DOWN LIGHT".

5 Measure voltage between C834 right headlight pin 2, circuit 64-LE46 (blue/red), on the wiring harness side, and "weight".

• Is voltage being registered?

→ Yes

Go to O5

→ No

REPAIR open circuit 64-LE46 (blue/red) between connection S106 and the right headlight using the wiring diagrams. Check the correct operation of the system.

O5: INSPECT ELECTRICAL CIRCUIT TO HEADLIGHT ADJUSTMENT MOTOR, RIGHT SIDE

1 Enter the OFF position.

2 Measure the resistance of all circuits between the headlight beam leveling motor connector C841, harness side, and the corresponding right headlight pin, C834, component side.

• Is the resistance less than 2 ohms in each case?

→ Yes

Check the headlight beam leveling motor for mechanical damage. If necessary, INSTALL the new element. Check the correct operation of the system.

→ No

REPAIR the relevant circuit using the wiring diagrams. Check the correct operation of the system.

O6: INSPECT MAIN CONTROL CIRCUIT TO HEADLIGHT CORRECTION MOTORS

1 Enter the OFF position.

2 Disconnect Headlight, left side - C835.

3 Disconnect the Light Switch - C320.

4 Measure the resistance between pin 1 C320 of the lighting switch, circuit 64-LE1 (blue/red), from the side of the wiring harness, and pin 2 C835 of the left headlight, circuit 64-LE45 (blue), from the wiring harness side.

• Is the resistance less than 2 ohms?

→ Yes

Go to O7

→ No

REPAIR open circuit 64-LE1 (blue/red) between the light switch and connection S106 using the wiring diagrams. Check the correct operation of the system.

O7: CHECK LIGHT SWITCH GROUND

1 Connect Headlight, left side - C835.

2 Connect the Light Switch - C320.

3 Drive the ON position.

4 Turn the light switch to "FRONT FOG LIGHTS".

5 Check the front fog light warning light built into the light switch.

• Is the indicator lamp on?

→ Yes

Check the light switch If necessary, INSTALL a new element. Check the correct operation of the system.

→ No

REPAIR open circuit 31-LE29 (BK) between light switch and "weight" G14 using the wiring diagrams. Check the correct operation of the system.