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:

Engine Coolant Temperature / Intake Air Temperature Correlation
DTC P011B Engine Coolant Temperature / Intake Air Temperature Correlation DESCRIPTION The ECM calculates the difference between the readings of the coolant temperature sensor and intake air temperature sensor. If the difference is greater than 20C (68F), the ECM will judge this as a malfunct ...

Engine
ON-VEHICLE INSPECTION 1. INSPECT ENGINE COOLANT (a) Inspect the engine coolant (See page CO-1). 2. INSPECT ENGINE OIL (a) Inspect the engine oil (See page LU-1). 3. INSPECT BATTERY (a) Inspect the battery (See page CH-5). 4. INSPECT AIR CLEANER FILTER ELEMENT SUBASSEMBLY (a) Remove the air c ...

On-vehicle inspection
1. CHECK POWER REAR NO. 2 SEAT with STOWING FUNCTION  Check the basic functions.  Operate the fold seat switch and power rear No.2 seat switch and check to make sure each seat function works: Folding-down operation  Stowing operation  Return operation ...