Toyota Sienna Service Manual: Customer problem analysis

Toyota Sienna Service Manual / Introduction / How to troubleshoot ecu controlled systems / How to proceed with troubleshooting / Customer problem analysis

HINT:

In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
Gather as much information as possible for reference.
Past problems that seem unrelated may also help in some cases.
The following 5 items are important points in the problem analysis:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Running conditions, driving conditions, weather conditions
How did it happen?	Problem symptoms

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 ...

Symptom confirmation and diagnostic trouble code

HINT: The diagnostic system in the SIENNA has various functions. The first function is the Diagnostic Trouble Code (DTC) check. A DTC is a code stored in the ECU memory whenever a malfunctio ...

Other materials:

Reclining Motor Circuit
DESCRIPTION The fold seat control ECU receives a switch operation signal from the power rear no. 2 seat switch and the fold seat switch, and activates the reclining motor. At this time, the Hall IC (seatback position sensor) detects the actuation of the seatback and sends a seatback actuation ...

Installation
1. INSTALL SLIDE DOOR ROLLER ASSEMBLY UPPER Apply MP grease to the rotating areas of the roller. Install the roller with the 2 bolts. Torque: 13 N*m (130 kgf*cm, 10 ft.*lbf) 2. INSTALL SLIDE DOOR HINGE ASSEMBLY CENTER LH Apply MP grease to the rotating areas of the hinge. In ...

Installation
1. INSTALL REAR NO. 2 SEAT ASSEMBLY LH Place the rear No. 2 seat assembly LH in the cabin. NOTICE: Be careful not to damage the body. Install the rear No. 2 seat assembly LH with the 2 bolts. Torque: 29 N*m (296 kgf*cm, 21 ft.*lbf) Install the locus cable with the ...