LIGHTING SYSTEM Indicator Circuit

DESCRIPTION

The headlight beam level control system indicator light in the combination meter sub-assembly comes on for approximately 3 seconds when the power switch is turned on (IG). The indicator light also comes on when the headlight leveling ECU assembly detects a malfunction.

WIRING DIAGRAM

*a	Combination Meter Sub-assembly
*b	from IG2 Relay
*c	Headlight Leveling ECU Assembly

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - COMBINATION METER SUB-ASSEMBLY)

   
   

   1. Disconnect the L27 combination meter sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition L27-2 (IG+) - Body ground Power switch on (IG) 11 to 14 V Power switch off Below 1 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. CHECK HARNESS AND CONNECTOR (COMBINATION METER SUB-ASSEMBLY - HEADLIGHT LEVELING ECU ASSEMBLY)

   
   

   1. Disconnect the A48 headlight leveling ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A48-6 (WNG) - L27-27 (LVWG) Always Below 1 Ω A48-6 (WNG) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. INSPECT COMBINATION METER SUB-ASSEMBLY

   
   
   1. 

      Text in Illustration

      *a	Component with harness connected (Combination Meter Sub-assembly)

      Reconnect the L27 combination meter sub-assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition L27-27 (LVWG) - Body ground Power switch on (IG) 11 to 14 V

      Result
      Result Proceed to OK A NG (w/o Multi-information display) B NG (w/ Multi-information display) C

   
   

   A

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   B

   REPLACE METER CIRCUIT PLATE Click here

   C

   REPLACE COMBINATION METER SUB-ASSEMBLY Click here