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:

Problem symptoms table
HINT: Before performing verification listed in the table below, check the fuse and relay. Check the circuits for each problem symptom in the order given in the table below, and proceed to the relevant page. CLEARANCE SONAR SYSTEM: *1: with Front Clearance Sonar *2: wit ...

Removal
1. REMOVE NO. 1 REAR SEAT OUTER BELT ASSEMBLY (for 8-Passenger) HINT: Refer to the instructions for disassembly of the rear No .1 seat assembly (for center seat). Remove the rear seatback board. Remove the rear seat shoulder belt cover. Remove the 2 bolts, 2 nuts and No. 1 re ...

Installation
1. INSTALL ACCELERATOR PEDAL ROD NOTICE: Avoid physical shock to the accelerator pedal assembly. Do not disassemble the accelerator pedal assembly. Install the accelerator pedal rod with the 2 nuts. Torque: 4.9 N*m (50 kgf*cm, 43 in.*lbf) Connect the ...