Toyota Sienna Service Manual: How to proceed with troubleshooting

Check and replace ecu

NOTICE: • The connector should not be disconnected from the ECU. Perform the inspection from the backside of the connector on the wire harness side. • When no measuring condition is s ...

Operation flow

HINT: Perform troubleshooting in accordance with the procedures below. The following is an outline of basic troubleshooting procedures. Confirm the troubleshooting procedures for the circuit you a ...

Other materials:

Removal
HINT:  Use the same procedures for the RH side and LH side.  The procedures listed below are for the LH side. 1. PRECAUTION CAUTION: Be sure to read "PRECAUTION" thoroughly before servicing. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait for 90 s ...

On-vehicle inspection
1. INSPECT FOR FUEL PUMP OPERATION AND FUEL LEAK (a) Check fuel pump operation. (1) Connect the intelligent tester to the DLC3. (2) Turn the engine switch on (IG) and push the intelligent tester main switch on. NOTICE: Do not start the engine. (3) Select the following menu it ...

No. 2 Ultrasonic sensor
COMPONENTS REMOVAL 1. REMOVE REAR BUMPER COVER (2) 2. REMOVE NO. 1 ULTRASONIC SENSOR RETAINER  Remove the No. 1 ultrasonic sensor retainer as shown in the illustration 3. REMOVE NO. 2 ULTRASONIC SENSOR  Disconnect the connector and remove the No. 2 ultrasonic ...