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 combination meter assembly controls the combination meter illumination in accordance with the light control signal from the light control rheostat.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING DATA LIST (RHEOSTAT VALUE)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester on.
(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(e) Check the values by referring to the table below.

Combination Meter:





OK:
The value displayed on the tester gradually changes as the actual rheostat operation.
OK -- REPLACE COMBINATION METER ASSEMBLY
NG -- Continue to next step.
2. INSPECT LIGHT CONTROL RHEOSTAT





(a) Remove the light control rheostat.
(b) Measure the resistance of the rheostat.
Standard resistance:






NG -- REPLACE LIGHT CONTROL RHEOSTAT
OK -- Continue to next step.
3. CHECK WIRE HARNESS (COMBINATION METER - LIGHT CONTROL RHEOSTAT)





(a) Disconnect the E19 meter connector.
(b) Disconnect the E2 rheostat connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






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