Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT:
- Use this procedure to troubleshoot the front power seat control system.
- The intelligent tester should be used in steps 3 and 5.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS CHECK AND PROBLEM SYMPTOM CHECK
3 CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)
- Use the intelligent tester to check for normal function of the multiplex communication system.
- (Position control ECU and switch assembly (power seat control switch and ECU) not connected, communication line malfunctioning) If no code is output, proceed to A.
- (Position control ECU and switch assembly (power seat control switch and ECU) not connected, communication line malfunctioning) If any code is output, proceed to B.
4 PROBLEM SYMPTOMS TABLE
- If the fault is not listed on the problem symptoms table, proceed to A.
- If the fault is listed on the problem symptoms table, proceed to B.
5 OVERALL ANALYSIS AND TROUBLESHOOTING
- DATA LIST/ACTIVE TEST.
- Inspection with the intelligent tester (DATA LIST).
- Inspection with the intelligent tester (ACTIVE TEST).
- Terminals of ECU.
- Inspection.
6 ADJUST, REPAIR OR REPLACE
7 CONFIRMATION TEST
END
System description
1. GENERAL DESCRIPTION
The power seat control system is equipped with the
following function:
The front seats are equipped with electric
adjuster slide, reclining, lifter, fr ...
Problem symptoms table
HINT:
Inspect the fuse and relay before confirming the suspected
areas in the table below.
Inspect each suspected area in numerical order for the
corresponding symptom.
If the ...
Other materials:
Internal Control Module Random Access Memory (RAM) Error
DESCRIPTION
The ECM continuously monitors its own internal memory status, internal
circuits, and output signals
transmitted to the throttle actuator. This self-check ensures that the ECM is
functioning properly. If any
malfunction is detected, the ECM sets the appropriate DTC and illumina ...
Installation
1. INSTALL TRANSMISSION WIRE
(a) Coat the O-ring of the transmission wire connector
with ATF and install it.
(b) Install the transmission wire with the bolt.
Torque: 5.4 N*m (55 kgf*cm, 48 ft.*lbf)
2. CONNECT TRANSMISSION WIRE
(a) Coat the O-ring of the ATF temperature sensor with
...
Outside vehicle
General maintenance
Check the parts of the vehicle described below on a daily
basis. Performing maintenance checks on the vehicle is the
owner's responsibility. The owner may take the vehicle to a
service center but it is recommended that the owner perform
the checks.
In most cases, special ...
