Toyota Sienna Service Manual: Meter Illumination does not Dim at Night
DESCRIPTION
- Confirm that the vehicle is equipped with the optitron meter, then check this circuit.
- The combination meter assembly receives a auto dimmer signal from the body ECU by the multiplex communication line.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK MULTIPLEX COMMUNICATION SYSTEM
- Check if MULTIPLEX communication DTC is output
Result
2 CHECK DTC
- Check if the DTC B1244 is output
Result
3 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
- Operate the intelligent tester according to the steps on the display and select "DATA LIST".
MAIN BODY
OK: The meter illumination is dimmed when the DIMMER SIG is ON.
CHECK LIGHTING SETTING
4 REPLACE COMBINATION METER ASSEMBLY
OK: The operation of the combination meter assembly returns to normal.
END
Meter Illumination is Always Dark
DESCRIPTION
Confirm that the vehicle is equipped with the optitron meter, then
check this circuit.
The combination meter assembly receives a auto dimmer signal from the
body ECU by t ...
Combination meter
COMPONENTS
...
Other materials:
Control Module Performance
DTC P0607 Control Module Performance
DESCRIPTION
This DTC indicates a malfunction in the ECM.
HINT:
The ECM receives signals from each sensor to control all the functions of the
cruise control with the
microcomputer. When a malfunction is detected, fail-safe remains on until the
ignition sw ...
DTC check / clear
1. DTC CHECK
Connect the intelligent tester to the DLC3.
Connect the intelligent tester to the Controller
Area Network Vehicle Interface Module (CAN
VIM). Then connect the CAN VIM to the Data
Link Connector 3 (DLC3).
Turn the ignition switch to the ON posi ...
Front power seat lumbar switch
Inspection
1. INSPECT FRONT POWER SEAT LUMBAR SWITCH
Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the result is not as specified, replace the switch. ...
