Toyota Sienna Service Manual: 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, but then comes on. | SRS Warning Light Remains ON |
| When the ignition switch is turned to the ON position, the SRS warning light sometimes remains on even after approximately 6 seconds. | SRS Warning Light Remains ON |
| The SRS warning light always comes on even when no DTC is output. | SRS Warning Light Remains ON |
| When the ignition switch is turned to the ON position, the SRS warning light does not come on. | SRS Warning Light does not Come ON |
| Although the SRS warning light operates normally, a DTC or a normal system code is not displayed. | Diagnosis Circuit |
| Although terminals TC and CG are not connected, a DTC or normal system code is displayed. | Diagnosis Circuit |
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 multi ...
Terminals of ECU
1. CENTER AIRBAG SENSOR ASSEMBLY (w/ Side
Airbag)
2. CENTER AIRBAG SENSOR ASSEMBLY (w/o Side
Airbag)
...
Other materials:
Rear Airbag Sensor RH Circuit Malfunction
DTC B1154/38 Rear Airbag Sensor RH Circuit Malfunction
DESCRIPTION
The rear airbag sensor RH circuit consists of the center airbag sensor
assembly and rear airbag sensor
RH.
If the center airbag sensor assembly receives signals from the rear airbag
sensor RH, it judges whether or
not the ...
Disassembly
1. REMOVE BLOWER ASSEMBLY
(a) Remove the 2 screws and the blower assembly.
2. REMOVE MODE DAMPER SERVO SUB-ASSEMBLY
(a) Remove the 3 screws and the mode damper servo
sub-assembly.
3. REMOVE AIRMIX DAMPER SERVO SUB-ASSEMBLY
(a) Remove the 3 screws and the airmix damper servo
sub-as ...
Removal
1. Disconnect cable from negative battery
terminal
2. REMOVE HEATED OXYGEN SENSOR (for Bank 1
Sensor 2) (See page EC-32)
3. REMOVE TAIL EXHAUST PIPE ASSEMBLY
(a) Remove the 2 bolts.
(b) Disconnect the 3 exhaust pipe supports and remove
the tail exhaust pipe assembly.
(c) Remove the gas ...
