Meter Illumination Does Not Dim At Night

METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Meter Illumination does not Dim at Night
- Meter Illumination does not Dim at Night

DESCRIPTION

If the dimmer switch is turned to TAIL, HEAD or AUTO, the main body ECU sends a TAIL relay signal, panel light illumination signal, panel relay signal, and TAIL cancel OFF signal to the combination meter. Then the meter and accessory meter become dim.

HINT
TAIL cancel switch: When the headlights are illuminated and the TAIL cancel switch is turned ON, the meter does not dim.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- Go to CAN COMMUNICATION SYSTEM Service Precautions
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (LIGHT CONTROL RHEOSTAT)

(a) Operate the Techstream according to the display and select Data List Scan Tool Testing and Procedures.

Combination Meter





HINT
*: w/ TAIL Cancel Switch

OK:

Light brightness can be changed within specified range by manual operation.

NG -- INSPECT LIGHT CONTROL RHEOSTAT

OK -- REPLACE COMBINATION METER ASSEMBLY Removal

3. INSPECT LIGHT CONTROL RHEOSTAT

(a) Inspect the light control rheostat.





(1) Remove the light control rheostat Removal.

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

Standard Resistance:





(b) Inspect the trip switch.

(1) 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.

4. CHECK HARNESS AND CONNECTOR (COMBINATION METER - LIGHT CONTROL RHEOSTAT)

(a) Disconnect the E8 meter connector.





(b) Disconnect the E9 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 COMBINATION METER ASSEMBLY Removal