Toyota Sienna Service Manual: Problem symptoms table

Customize parameters

1. Seat Belt Buzzer ON/OFF Setting The seat belt buzzer ON/OFF setting, which is a setting of the buzzer function of the combination meter, can disable the driver side seat belt buzzer and front p ...

Terminals of ECU

1. COMBINATION METER ASSEMBLY *1: with Power Rear No. 2 Seat with Stowing Function *2: with Theft Deterrent System  Waveform 1 (Reference) : Using an oscilloscope: OK ...

Other materials:

Circuit opening relay
Inspection 1. INSPECT CIRCUIT OPENING RELAY  Using an ohmmeter, measure the resistance according to the value(s) in the table below. Standard resistance If the result is not as specified, replace the relay. ...

How to proceed with troubleshooting
1 VEHICLE BROUGHT TO WORK SHOP 2 CUSTOMER PROBLEM ANALYSIS 3 CHECK BODY MULTIPLEX COMMUNICATION SYSTEM Check for the DTC outputs. 4 DTC CHECK 5 DTC CHART 6 PROBLEM SYMPTOMS TABLE 7 TERMINAL OF ECU 8 CIRCUIT INSPECTION 9 IDENTIFICATION OF PROBLEM 10 REPAIR OR REPLACE 11 CONFIRMATION T ...

If a warning light turns on or a warning buzzer sounds
Calmly perform the following actions if any of the warning lights comes on or flashes. If a light comes on or flashes, but then goes off, this does not necessarily indicate a malfunction in the system. However, if this continues to occur, have the vehicle inspected by your Toyota dealer. Warnin ...