Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT: *: Use the intelligent tester.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
- (a) Confirm problem symptoms
3 CHECK MULTIPLEX COMMUNICATION SYSTEM*
- Check if the multiplex communication system DTC is output.
HINT: The center airbag sensor assembly of this system is connected to the multiplex communication system.
Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.
Result:
INSPECT MULTIPLEX
COMMUNICATION
CIRCUIT
4 CHECK CAN COMMUNICATION SYSTEM*
- Use the intelligent tester to check if the CAN communication system is functioning normally .
HINT: The ECM is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.
Result:
INSPECT CAN COMMUNICATION
CIRCUIT
5 SRS WARNING LIGHT CHECK
- Proceed to Diagnosis System
6 CHECK FOR DTC*
- Proceed to DTC Check / Clear (5).
Result:
GO TO STEP 8
7 DIAGNOSTIC TROUBLE CODE CHART
- Proceed to Diagnostic Trouble Code Chart
GO TO STEP 10
8 SYMPTOM SIMULATION
- Proceed to Diagnosis System
9 PROBLEM SYMPTOMS TABLE
- Proceed to Problem Symptoms Table
10 CIRCUIT INSPECTION
11 IDENTIFICATION OF PROBLEM
12 REPAIR OR REPLACEMENT
13 CONFIRMATION TEST
END
System description
1. GENERAL
In conjunction with impact absorbing structure for a
frontal collision, the SRS (Supplemental Restraint
System) driver airbag and front passenger airbag
were designed to supplemen ...
Problem symptoms table
HINT:
Proceed to the troubleshooting for each circuit in the table
below.
AIRBAG SYSTEM
Symptom
Suspected Area
The SRS warning light goes off after the primary
check, ...
Other materials:
Seat heaters
For driver’s seat
For front passenger’s seat
On
The indicator light comes on.
Adjusts the seat temperature
The further you move the dial
upward, the warmer the seat
becomes.
The seat heaters can be used when the engine switch is in the “ON”
position
(vehicles ...
On-vehicle inspection
1. INSPECT COOLER CONDENSER CORE
(a) If the fin of the cooler condenser core is dirty, clean
it with water and dry it with compressed air.
NOTICE:
Do not damage the fin of the cooler condenser
core.
(b) If the fin of the cooler condenser core is bent, make
it straight using a screwdriver or p ...
Setting the vehicle speed
Press the “ON-OFF” button to
activate the cruise control.
Cruise control indicator will come
on*1 or will be displayed on the
multi-information display*2.
Press the button again to deactivate
the cruise control.
Accelerate or decelerate the
vehicle to the desired s ...
