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 meter CPU receives signals for adjusting illumination on the meter from this circuit. The meter CPU detects the illumination level selected by the user according to the position of the rheostat knob.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (LIGHT RHEOSTAT)
(a) Connect Techstream to the DLC3.
(b) Turn the switch to the ON position.
(c) Turn the tester ON.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) Check the values by referring to the table below.

Combination Meter:

OK:
Light brightness displayed on the tester is almost the same as the actual light brightness.
NG -- CHECK HARNESS AND CONNECTOR (LIGHT CONTROL RHEOSTAT CIRCUIT)
OK -- REPLACE COMBINATION METER ASSEMBLY
2. CHECK HARNESS AND CONNECTOR (LIGHT CONTROL RHEOSTAT CIRCUIT)

(a) Disconnect the C10 connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE COMBINATION METER ASSEMBLY