Toyota Sienna Service Manual: Combination meter

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 EC ...

Removal

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait for 90 seconds after disconnecting the cable to prevent the airbag working. 2. REMOVE INSTRUMENT CLUSTER FINISH PANEL SUB-ASSEMBLY ...

Other materials:

Automatic Light Control Sensor Circuit
DESCRIPTION The Multiplex network body ECU receives the signal from the automatic light control sensor. HINT: DTC code is output when malfunction of automatic light control sensor or open or short of automatic light control sensor circuit occurs. WIRING DIAGRAM INSPECTION PROCEDURE ...

Active Control Engine Mount System
DESCRIPTION LOCATION The Active Control Engine Mount (ACM) system decreases engine vibration at engine idling using the ACM VSV. The VSV is controlled by a pulse signal transmitted to the VSV from the ECM. The frequency of this pulse signal is matched to the engine speed to decrease engine ...

How to proceed with troubleshooting
The intelligent tester can be used at step 2, 5, 8, 11. 1 Vehicle Brought to Workshop 2 Check and Clear DTCs and Freeze Frame Data HINT: See page BC-82 and BC-84. 3 Problem Symptom Confirmation 4 Symptom Simulation 5 DTC Check HINT: See page BC-82. 6 Problem Symptoms Table HINT: ...