Meter / Gauge System Meter Illumination Is Always Dark
Meter. Camry. Acv40 Gsv40
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
CHECK DTC
PERFORM ACTIVE TEST USING INTELLIGENT TESTER
REPLACE COMBINATION METER ASSEMBLY
METER / GAUGE SYSTEM - Meter Illumination is Always Dark |
DESCRIPTION
The meter CPU receives auto dimmer signals from the main body ECU via the CAN communication lines (CAN No. 1 Bus). When the meter CPU receives an auto dimmer signal, it dims the meter illumination. The main body ECU determines whether it is daytime, twilight, or nighttime based on the waveform transmitted from the automatic light control sensor. If the main body ECU determines that it is daytime, the ECU does not send auto dimmer signals. Therefore, the meter illumination (warning and indicator lights) will not dim even if the driver accidentally turns the light control switch to the TAIL or HEAD position in daytime.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK CAN COMMUNICATION SYSTEM |
Check if CAN communication DTC is output (CAMRY_ACV40 RM000000WIB05NX.htmlfor LHD, CAMRY_ACV40 RM000000WIB05SX.html for RHD).
- Result:
| | GO TO CAN COMMUNICATION SYSTEM |
|
|
Check if DTC B1244 is output (CAMRY_ACV40 RM000000PKT007X.html).
- Result:
| 3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Turn the tester ON.
Light control switch TAIL/HEAD.
Enter the following menus: Diagnosis / Body / Main Body / Active Test.
Check the meter illumination.
Main Body:Tester Display
| Measurement Item/Range
| Diagnostic Note
|
Dimmer Sig
| Auto dimmer signal ON/OFF
| -
|
- OK:
- The meter illumination is dimmed when the Dimmer Sig is ON.
- HINT:
- Refer to the sensitivity setting in the customization table of the automatic light control system. (Link)
| 4.REPLACE COMBINATION METER ASSEMBLY |
Replace the combination meter assembly with a new or a normal one.
- OK:
- The operation of the combination meter assembly returns to normal.
