Operating Light Control Rheostat Does Not Change Light Brightness

METER: METER / GAUGE SYSTEM: Operating Light Control Rheostat does not Change Light Brightness
- Operating Light Control Rheostat does not Change Light Brightness

DESCRIPTION

The No. 1 meter ECU receives signals for adjusting illumination on the meter of this circuit. The No. 1 meter ECU detects the illumination level selected by the user according to the switch operation.

HINT
The meter illumination level can be adjusted by pushing the rheostat UP and DOWN switches.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (LIGHT CONTROL RHEOSTAT)

(a) Operate the Techstream according to the display and select "Data List".

OK:

Switch condition (ON/OFF) can be switched by actual operation.

Combination Meter:





NG -- INSPECT LIGHT CONTROL RHEOSTAT

OK -- REPLACE NO. 1 METER ECU Disassembly

2. INSPECT LIGHT CONTROL RHEOSTAT





(a) Remove the rheostat Removal.

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

Standard resistance:





NG -- REPLACE LIGHT CONTROL RHEOSTAT Removal
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (NO. 1 METER ECU - LIGHT CONTROL RHEOSTAT AND BODY GROUND)





(a) Disconnect the L10 ECU connector.

(b) Disconnect the L8 rheostat connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE NO. 1 METER ECU Disassembly