For 1990-2009 cars

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
Schematic Reference: Headlight Leveling Schematics Connector End View Reference: Component Connector End Views
1 | Inspect the headlamps. Do the headlamps work? | -- | Go to Step 3 | Go to Step 2
2 | Repair the headlamp system before completing this diagnostic table. Did you complete the repair? | -- | Go to Step 3 | --
3 | Inspect fuses Ef20 and Ef27. Is either of the fuses open? | -- | Go to Step 5 | Go to Step 4
4 |

1. Inspect for a short circuit and repair if necessary.
2. Replace the open fuse.

Did you find and correct the condition?

--

System OK

--

5 |

1. Turn the headlamps ON.
2. Measure the voltage at fuses Ef20 and Ef27.

Does the voltage measure within the specified range?

11-14 V

Go to Step 7

Go to Step 6

6 | Repair the open circuit between the headlamp switch and fuses Ef20 and Ef27. Did you complete the repair? | -- | System OK | --
7 |

1. Disconnect the electrical connectors at the headlamp leveling motors.
2. Turn the headlamps ON.
3. Measure the voltage at terminal 5 of the headlamps.

Does the voltage available at both headlamp leveling motors measure within the specified range?

11-14 V

Go to Step 9

Go to Step 8

8 | Repair the open circuit between fuses Ef20 and Ef27 and the headlamps. Did you complete the repair? | -- | System OK | --
9 | With the headlamp leveling motors disconnected, measure the resistance between ground and terminal 6 of the headlamps. Is the resistance equal to the specified value? | 0 Ω | Go to Step 11 | Go to Step 10
10 | Repair the ground circuit for the headlamps. Did you complete the repair? | -- | System OK | --
11 |

1. Turn the headlamps ON.
2. With the headlamps, measure the voltage at terminal 3 of the headlamp connector.

Does the voltage measure within the specified range?

6.2-10.6 V

Go to Step 16

Go to Step 12

12 |

1. Disconnect the headlamp leveling switch.
2. Turn the headlamps ON.
3. Measure the voltage at the connector 3 wire at the headlamp leveling switch connector.

Does the voltage measure within the specified range?

11-14 V

Go to Step 14

Go to Step 13

13 | Repair the open circuit between the headlamp relay and the headlamp leveling switch. Did you complete the repair? | -- | System OK | --
14 |

1. Turn the low-beam headlamps ON.
2. With the headlamp leveling switch removed for testing and the electrical connector still connected, measure the voltage at the D-GN wire at the headlamp leveling switch with the switch dial set at 0.

Is the voltage within the specified range?

11-14 V

Go to Step 16

Go to Step 15

15 | Replace the headlamp leveling switch. Did you complete the replacement? | -- | System OK | --
16 |

1. Turn the low-beam headlamps ON.
2. With the headlamp leveling switch removed for testing and the electrical connector still connected, measure the voltage at the D-GN wire at the headlamp leveling switch with the switch dial set at 3.

Is the voltage equal to the specified value?

4.5 V

Go to Step 17

Go to Step 15

17 | Repair the open D-GN wire between the headlamp leveling switch and the headlamp leveling motors. Did you complete the repair? | -- | System OK | --