Toyota Sienna Service Manual: DTC check / clear
1. DTC CHECK (USING SST CHECK WIRE)

- Check the DTCs (Present trouble code).
- Turn the ignition switch ON, and wait for
approximately 60 seconds.
- Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
NOTICE:
Connect the terminals to the correct
positions to avoid a malfunction.
- Check the DTCs (Past trouble code).
- Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
NOTICE:
Connect the terminals to the correct
positions to avoid a malfunction.
- Turn the ignition switch ON, and wait for
approximately 60 seconds.

- Read the DTCs.
- Read the blinking patterns of the DTCs. As
examples, the blinking patterns for the normal
system code and trouble codes 11 and 31 are
shown in the illustration.
If there are more than 1 code, there will be a 2.5-
second pause between each code. After all
codes are shown, there will be a 4.0-second
pause, and they all will be repeated.
HINT:
- If 2 or more malfunctions are found, the
indication begins with the smaller numbered
code.
- If DTCs are indicated without connecting the
terminals, proceed to the "Diagnosis Circuit"
2. DTC CLEAR (USING SST CHECK WIRE)
- Clear the DTCs.
- When the ignition switch is turned off, the DTCs
are cleared.
HINT:
Depending on the DTC, the code may not be
cleared by turning off the ignition switch. In this
case, proceed to the next procedure.
- Using SST, connect terminals TC and CG of the
DLC3, and then turn the ignition switch to the
ON position.
SST 09843-18040
- Disconnect terminal TC of the DLC3 within 3 to
10 seconds after the DTCs are output, and
check if the SRS warning light comes on after 3
seconds.
- ) Within 2 to 4 seconds after the SRS warning
light comes on, connect terminals TC and CG of
the DLC3.
- ) The SRS warning light should go off within 2 to 4
seconds after connecting terminals TC and CG
of the DLC3. Then, disconnect terminal TC
within 2 to 4 seconds after the SRS warning light
goes off.
- The SRS warning light comes on again within 2
to 4 seconds after disconnecting terminal TC.
Then, reconnect terminals TC and CG of the
DLC3 within 2 to 4 seconds after the SRS
warning light comes on.
- Check if the SRS warning light goes off within 2
to 4 seconds after connecting terminals TC and
CG of the DLC3. Also check if the normal
system code is output within 1 second after the
SRS warning light goes off.
If DTCs are not cleared, repeat this procedure
until the codes are cleared.

3. DTC CHECK

- Check the DTCs.
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Check the DTCs by following the prompts on the
tester screen.
HINT:
Refer to the intelligent tester operator's manual
for further details.
- Clear the DTCs.
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Clear the DTCs by following the prompts on the
tester screen.
HINT:
Refer to the intelligent tester operator's manual
for further details.
1. CHECK DLC3
The ECU uses ISO 15765-4 for communication.
The terminal arrangement of the DLC3 complies
with SAE J1962 and matches the ISO 15765-4
format.
NOTICE:
*: Before ...
1. CHECK MODE (SIGNAL CHECK): DTC CHECK
Connect the intelligent tester to the DLC3.
) Turn the ignition switch to the ON position.
) Select the "SIGNAL CHECK", and proceed
...
Other materials:
Disassembly
1. REMOVE REAR NO. 2 SEAT COVER BEZEL
Remove the 3 screws.
Disengage the 3 claws and remove the rear No. 2
seat cover bezel.
2. REMOVE REAR SEAT RECLINING COVER RH
Remove the 2 screws.
Disengage the claw and remove the rear seat
reclining cover RH.
...
Seat Position Airbag Sensor Circuit Malfunction
DTC B1153/25 Seat Position Airbag Sensor Circuit Malfunction
DESCRIPTION
The seat position airbag sensor circuit consists of the center airbag sensor
assembly and the seat
position airbag sensor.
DTC B1153/25 is recorded when a malfunction is detected in the seat position
airbag sensor cir ...
Precaution
Keep in mind the following points when inspecting the
dynamic laser cruise control system.
As there is a limitation on the vehicle-to-vehicle distance
controlling capability, do not overly rely on the dynamic
laser cruise control system.
Do not neglect to pay constant attentio ...