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Home >> Lexus >> 2012 >> IS 250 RWD V6-2.5L (4GR-FSE) >> Repair and Diagnosis >> Lighting and Horns >> Testing and Inspection >> Component Tests and General Diagnostics >> Lighting System >> Headlight Leveling ECU Power Source Circuit
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Headlight Leveling ECU Power Source Circuit





LIGHTING: LIGHTING SYSTEM: Headlight Leveling ECU Power Source Circuit
- Headlight Leveling ECU Power Source Circuit

DESCRIPTION

This circuit is uses to detect the on (IG) state of the power source circuit. The headlight leveling ECU assembly receives the signal from the LH-IG1 relay.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (H-LP LVL)

(a) Remove the H-LP LVL fuse from the cowl side junction block LH.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BATTERY AND BODY GROUND)

(a) Disconnect the A61 headlight leveling ECU assembly connector.

(b) Measure the voltage and resistance of the wire harness side connector.

Standard voltage:





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
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