Toyota Sienna Service Manual: Diagnosis system
1. CHECK DLC3

- The vehicle's ECU uses ISO 15765-4 for
communication protocol. The terminal arrangement
of the DLC3 complies with SAE J1962 and matches
the ISO 15765-4 format.

NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
operate the ignition switch, any other switches
or the doors.
If the result is not as specified, the DLC3 may have
a malfunction. Repair or replace the harness and
connector.
- Connect the cable of the intelligent tester to the
DLC3, turn the ignition switch to the ON position
and attempt to use the intelligent tester. If the
screen displays a communication error message, a
problem exists in the vehicle side of the tester side.

HINT:
- If communication is normal when the tool is
connected to another vehicle, inspect the DLC3
on the original vehicle.
- If communication is still impossible when the tool
is connected to another vehicle, the problem is
probably in the tool itself. Consult the Service
Department listed in the tool's instruction manual.
2. BACK DOOR LOCK
- When the battery is reconnected:
The back door is locked and therefore cannot be
opened. Therefore, it is necessary to unlock the
back door using the door control switch or
transmitter switch.
1. CHECK POWER BACK DOOR ECU
Disconnect the P13 and P14 ECU connectors, and
check the voltage and resistance of each terminal of
the wire harness side connectors
If the result is no ...
1. CHECK DTC (USING INTELLIGENT TESTER)
Checking DTCs.
Connect the intelligent tester to the DLC3.
Turn the ignition switch ON.
Read DTCs by following the pro ...
Other materials:
CD Sound Skips
INSPECTION PROCEDURE
1 CHECK CD
Check the CD.
OK:
The CD is clean.
HINT:
If dirt is on the CD surface, wipe it clean with a soft cloth
from the inside to the outside in a radial direction.
NOTICE:
Do not use a conventional record cleaner or antistatic
preservative.
2 CHECK CD
...
Drive shaft
SST
RECOMMENDED TOOLS
HINT:
Torx is a registered trademark of Textron Inc.
EQUIPMENT
LUBRICANT
...
Terminals of ecm
1. Ecm
Hint:
each ecm terminal's standard voltage is shown in the
table below.
In the table, first follow the information under "condition".
Look under "symbols (terminal no.)" For the terminals to
inspected. The standard voltage between the terminals
is shown under ...