( TL19E00J32134931116FDAT00 )

Headlight Leveling Control Unit Input Test/Replacement

NOTE: Before testing, make sure that there is no DTCs and combination light switch circuit is OK.

1. Turn the ignition switch to LOCK (0).

1. Remove the driver's dashboard undercover, then remove the dashboard lower cover.

1. Remove the bolt from the headlight leveling control unit bracket, then disconnect the 16P connector (A) from the headlight leveling control unit (B).

1. Inspect the connector and socket terminals to be sure they are all making good contact.
   - If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
   - If the terminals are OK, go to Step 5 .

1. With the connector still disconnected, make these input tests at the connector.
   - If any test indicates a problem, find and correct the cause, then recheck the system.
   - If all the input tests prove OK, go to Step 6 .

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   9

   BLK

   Under all conditions

   Check for continuity to ground: There should be continuity.

   - Poor ground (G503) [G251]
   - An open in the wire

   1

   BLU

   Ignition switch ON (II)

   Measure the voltage to ground: There should be battery voltage.

   - Blown No. 6 (7.5 A) fuse in the driver's under-dash fuse/relay box
   - An open in the wire

   [ ]: | RHD model

1. Reconnect the connector, turn the ignition switch to ON (II), and make these input tests at the connector.
   - If any tests indicates a problem, find and correct the cause, then recheck the system.
   - If all the input tests prove OK, replace the headlight leveling control unit.
   NOTE: After replacing the control unit, do the headlight initial position learning procedure.

   Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained
   --- | --- | --- | --- | ---

   3

   WHT

   Under all conditions

   Measure the voltage to ground: There should be less than 0.5 V.

   - Poor ground (G503) [G251]
   - An open in the wire

   4

   LT BLU

   Under all conditions

   Measure the voltage to ground: There should be less than 0.5 V.

   - Poor ground (G503) [G251]
   - An open in the wire

   2

   YEL

   Ignition switch ON (II), headlight switch ON

   Measure the voltage between the No. 2 and No. 3 terminals: There should be battery voltage.

   - Faulty headlight leveling motor
   - An open in the wire

   3 | WHT

   11

   ORN

   Ignition switch ON (II), headlight switch ON

   Measure the voltage between the No. 11 and No. 3 terminals: There should be about 2 to 12 V.

   - Faulty headlight leveling motor
   - An open in the wire

   3 | PNK

   4

   LT BLU

   Ignition switch ON (II)

   - Measure the voltage between the No. 4 and No. 13 terminals: There should be about 5 V.
   - Measure the voltage between the No. 4 and No. 6 terminals: There should be about 0.5 to 4.5 V.

   - Faulty front suspension stroke sensor
   - An open in the wire

   6 | GRN
   13 | GRY

   4

   LT BLU

   Ignition switch ON (II)

   - Measure the voltage between the No. 4 and No. 13 terminals: There should be about 5 V.
   - Measure the voltage between the No. 4 and No. 7 terminals: There should be about 0.5 to 4.5 V.

   - Faulty rear suspension stroke sensor
   - An open in the wire

   7 | LT GRN
   13 | GRY

   [ ]: | RHD model