Toyota Sienna Service Manual: Terminals of ECU

Problem symptoms table

HINT: Proceed to troubleshooting of each circuit in the table below. 1. HEADLIGHT AND TAIL LIGHT SYSTEM 2. AUTOMATIC LIGHT CONTROL SYSTEM 3. LIGHT AUTO TURN OFF SYSTEM 4. FOG LIGHT SY ...

DTC check / clear

1. USING INTELLIGENT TESTER  Hook up the intelligent tester to the DLC3.  Monitor the ECU data by following the prompts on the tester screen. HINT: intelligent tester has "S ...

Other materials:

Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION This circuit is necessary for the ASL (Auto Sound Leveliser) built into the radio receiver. Speed signals are received from the combination meter and used for the ASL. The ASL function automatically adjusts the sound data in order to enable hearing the clear audio sound even ...

Clearance Warning ECU Power Source Circuit
DESCRIPTION This circuit provides power to the clearance warning ECU. WIRING DIAGRAM INSPECTION PROCEDURE 1 CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU - AIR CONDITIONER AMPLIFIER) Disconnect the connectors from the clearance warning ECU C9 and air conditioner amplifier con ...

Rear Occupant Classification Sensor LH Circuit Malfunction
DTC B1782 Rear Occupant Classification Sensor LH Circuit Malfunction DESCRIPTION The rear occupant classification sensor LH circuit consists of the occupant classification ECU and the rear occupant classification sensor LH. DTC B1782 is recorded when a malfunction is detected in the rear oc ...