Toyota Sienna Service Manual: Problem symptoms table

Toyota Sienna Service Manual / Seat / Rear no. 2 Seat assembly (w/ Power Stowing Function) / Problem symptoms table

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspect Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed.
Replace parts as necessary.
Inspect the fuse and relays related to the system before inspecting the suspected areas below.

POWER REAR NO. 2 SEAT with STOWING FUNCTION

Symptom	Symptom Suspected area
No functions operate.	Power source circuit Fold seat control ECU
The folding-down function does not operate.	Park/Neutral position switch circuit Back door courtesy switch circuit Lock switch circuit Reclining motor circuit Fold seat switch circuit Folding motor circuit Folding motor Fold seat control ECU
The return function does not operate.	Park/Neutral position switch circuit Back door courtesy switch circuit Reclining motor circuit Folding motor circuit Fold seat switch circuit Release actuator circuit Folding motor Release actuator Fold seat control ECU
The stowing function does not operate.	Park/Neutral position switch circuit Back door courtesy switch circuit Reclining motor circuit Folding motor circuit Fold seat switch circuit Fold lock switch circuit Folding motor Fold seat control ECU
The reclining function does not operate.	Lock switch circuit Reclining motor circuit Rear power seat switch circuit Fold seat control ECU
The indicator does not come on or blink.	Indicator circuit Fold seat control ECU

Initialization

HINT: The seatback position is initialized at the factory before shipment, so initialization is not normally required. There is an initialization function for cases when reinitializati ...

Terminals of ECU

1. FOLD SEAT CONTROL ECU LH Disconnect the fold seat control ECU connectors. Measure the voltage and resistance of the wire harness side connectors. If the result is not as specifie ...

Other materials:

Power Window cannot be Operated by Wireless Operation
DESCRIPTION When the switch on the transmitter is operated during normal operating conditions, the multiplex network body ECU sends a request signal to the master switch and the regulator switches which then drive the applicable power window motors. INSPECTION PROCEDURE 1 CHECK WIRELESS DOO ...

Installation
1. INSTALL REAR NO. 1 SEAT ASSEMBLY CENTER Place the seat in the cabin. NOTICE: Be careful not to damage the body. Install the rear seat. Install the seat belt anchor plate with the bolt. Torque: 42 N*m (428 kgf*cm, 31 ft.*lbf) Install the headrest. ...

On-vehicle inspection
1. CHECK VVT SENSOR OUTPUT VOLTAGE Turn the ignition switch to the ON position. Check the voltage between the specified terminal and body ground. Standard voltage While turning the crankshaft pulley by hand, measure the voltage between each terminal. Check that the voltage ...