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:

Installation
HINT: Use the same procedures for the RH side and LH side. The procedures listed below are for the LH side. 1. INSTALL REAR AIRBAG SENSOR LH Check that the ignition switch is off. Check that the battery negative (-) terminal is disconnected. CAUTION: ...

Short to GND in Curtain Shield Squib LH Circuit
DTC B1167/85 Short to GND in Curtain Shield Squib LH Circuit DESCRIPTION The curtain shield squib LH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly LH. The circuit instructs the SRS to deploy when deployment conditions are met. DTC B1167/85 is ...

Hood
COMPONENTS Adjustment HINT: Since a centering bolt is used as a hood hinge mounting bolt and hood lock mounting bolt, the hood and hood lock can not be adjusted with them on. Substitute a bolt with a washer for the centering bolt. 1. INSPECT HOOD SUB-ASSEMBLY Check that the clearance is ...