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
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 ...
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:
DTC check / clear
1. DTC CHECK/CLEAR (USING INTELLIGENT TESTER:)
DTC check
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Read the DTCs on the tester screen.
DTC clear
Connect the intelligent tester to the DLC3.
&n ...
Inspection
1. INSPECT OIL PUMP ASSEMBLY
(a) Turn the drive gear with the 2 screwdrivers and
make sure that it rotates smoothly.
NOTICE:
Be careful not to damage the oil seal lip.
2. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY
(a) Push the driven gear to one side of the body.
(b) Using ...
Correct use of the seat belts
Make sure that all occupants are wearing their seat belts before driving
the vehicle. Use a child restraint system appropriate for the child until the child
becomes large enough to properly wear the vehicle’s seat belt.
Adjusting the mirrors
Make sure that you can see backward clearly by adjus ...