Toyota Sienna Service Manual: How to proceed with troubleshooting
HINT: *: Use the intelligent tester.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
- 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:
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:
5 SRS WARNING LIGHT CHECK
- Proceed to Diagnosis System
6 CHECK FOR DTC*
- Proceed to DTC Check / Clear.
Result:
7 DIAGNOSTIC TROUBLE CODE CHART
- Proceed to Diagnostic Trouble Code Chart
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 sup ...
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:
Removal
1. REMOVE INSTRUMENT CLUSTER CENTER NO. 1 FINISH PANEL
2. REMOVE INSTRUMENT CLUSTER CENTER NO. 2
FINISH PANEL
3. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY
4. REMOVE POSITION INDICATOR HOUSING ASSEMBLY
5. REMOVE INSTRUMENT CLUSTER CENTER LOWER FINISH PANEL SUB-ASSEMBLY
6. REMOVE POWER POINT SOCKET A ...
Front Occupant Classification Sensor RH Collision
Detection
DTC B1786 Front Occupant Classification Sensor RH Collision
Detection
DESCRIPTION
DTC B1786 is output when the occupant classification ECU receives a collision
detection signal sent by
the front occupant classification sensor RH if an accident occurs.
DTC B1786 is also output when the front ...
Automatic door locking and unlocking systems
The following functions can be set or cancelled: For instructions on
customizing, refer to
Function
Operation
Shift position linked door
locking function
Shifting the shift lever out of P locks all the
doors
Shift position linked door
unlocking function
...
