Generator Signal Circuit

LIGHTING: LIGHTING SYSTEM: Generator Signal Circuit
- Generator Signal Circuit

DESCRIPTION

The headlight leveling ECU assembly uses the ALTL signal as the engine running signal to judge whether to operate the automatic headlight beam level control system.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) (INPUT VOLTAGE)

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - MAIN BODY ECU LH)

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

2. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - MAIN BODY ECU LH)

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

(b) Disconnect the A30 main body ECU LH connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

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