Headlight Leveling System: Diagnosis Acura RL II facelift

Headlight Leveling Motor Test

Note. Before testing, check the No. 11 (7.5 A) and No. 29 (7.5 A) fuses in the driver's under-dash fuse/relay box.

Scheme 3

1. Disconnect the 3P connector (A) from the headlight leveling motor (B).
2. Check for continuity between headlight leveling motor 3P connector terminal No. 3 and body ground. There should be continuity. If there is continuity, go to step 3 . If there is no continuity, check for: Faulty adaptive front lighting control unit. An open in the wire between the adaptive front lighting control unit and the headlight leveling motor. Poor ground (G401).
3. Turn the ignition switch to ON (II).
4. Measure the voltage between headlight leveling motor 3P connector terminal No. 1 and body ground. There should be battery voltage. If there is battery voltage, go to step 5 . If there is no voltage, check for: Faulty adaptive front lighting control unit. An open in the wire between the adaptive front lighting control unit and the headlight leveling motor.
5. Turn the headlight switch ON.
6. Measure the voltage between headlight leveling motor 3P connector terminal No. 2 and body ground. There should be about 3-13 V. NOTE: The voltage will vary depending on the vehicle position. If there is battery voltage, replace the headlight leveling motor (see «HEADLIGHT LEVELING MOTOR REPLACEMENT»(ref-348592-S35630478842009112400000) ). If there is no voltage, check for: Faulty adaptive front lighting control unit. An open in the wire between the adaptive front lighting control unit and the headlight leveling motor.

Scheme 4

1. Remove the suspension stroke sensor (see «SUSPENSION STROKE SENSOR REPLACEMENT»(ref-348592-S28466962172009112400000) ).
2. Measure the resistance between suspension stroke sensor 3P connector terminals No. 1 and No. 3. There should be about 3.5-6.5 kohms.
3. Measure the resistance between suspension stroke sensor 3P connector terminals No. 2 and No. 3 with the linkage (A) moved. There should be about 0.5-4.5 kohms.
4. If the resistance is not as specified, replace the suspension stroke sensor (see «SUSPENSION STROKE SENSOR REPLACEMENT»(ref-348592-S28466962172009112400000) ).

Scheme 5

1. Lift the vehicle, and support it with safety stands (see «LIFT AND SUPPORT POINTS»(ref-348503-S24456212342009112400000) ).
2. Disconnect the 3P connector (A) from the suspension stroke sensor (B).
3. Remove the bolts and nut, then remove the suspension stroke sensor.
4. Install the sensor in the reverse order of removal.
5. After replacement, do «HEADLIGHT INITIAL POSITION LEARNING PROCEDURE»(ref-348592-S37032385852009112400000) .

Scheme 6

Scheme 7

1. Remove the headlight assembly (see «HEADLIGHT REPLACEMENT»(ref-348574-S00468805692009112400000) ).
2. Turn the HID light cover 45° counterclockwise to remove it from the headlight housing (see «BULB REPLACEMENT»(ref-348574-S38533698052009112400000) ).
3. Turn the leveling motor (A) 45° clockwise.
4. Pull the headlight reflector (A) slightly, and remove the headlight leveling motor (B).
5. Install the parts in the reverse order of removal.
6. After installation, do «HEADLIGHT INITIAL POSITION LEARNING PROCEDURE»(ref-348592-S37032385852009112400000) .