Toyota Sienna Service Manual: Terminals of ECU
1. CHECK DRIVER SIDE J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)
- Disconnect the 1C, 1J, 1L, 1K, 1P, B6, B7 and B9 J/ B connectors.
- Measure the voltage and resistance according to the value(s) in the table below.
Standard
HINT:
- If the result is not as specified, there may be a malfunction on the wire harness side.
- *1: w/o Power back door
- Reconnect the J/B and ECU connectors and measure the voltage according to the value(s) in the table below.
Standard voltage
HINT:
- *1: w/o Power Back Door
- Use an oscilloscope to check the output voltages of terminals LSWD, LSWP, LSWL and LSWR.
- If the result is not as specified, the J/B (body ECU) may have a malfunction.
2. CHECK POWER BACK DOOR ECU (w/ Power back door system)
- Disconnect the P13 and P14 ECU connectors.
- Measure the voltage and resistance according to the value(s) in the table below.
Standard
HINT: If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the ECU connectors and measure the voltage according to the value(s) in the table below.
Standard voltage
HINT: If the result is not as specified, the ECU may have a malfunction.
Problem symptoms table
HINT:
Inspect the fuse and relay before investigating the suspected
areas shown in the table below.
POWER DOOR LOCK CONTROL SYSTEM
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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.
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Other materials:
Installation
HINT:
Install the RH side by the same procedures with LH side.
1. INSTALL FRONT SPEED SENSOR LH
(a) Install the speed sensor front LH with the bolt.
Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf)
NOTICE:
Keep the tip of the front speed sensor LH.
(b) Install the sensor harness clamps with th ...
On-vehicle inspection
1. FRONT SEAT SIDE AIRBAG ASSEMBLY (VEHICLE NOT INVOLVED IN COLLISION)
Perform a diagnostic system check.
With the front seat side airbag assembly installed on
the vehicle, perform a visual check. If there are any
defects as mentioned below, replace the front
seatback ass ...
TRAC OFF Indicator Light does not Come ON
DESCRIPTION
The skid control ECU is connected to the combination meter via CAN and
multiplex communications.
When the traction OFF switch is turned on, the TRAC OFF indicator light will
come on (for 2WD model).
WIRING DIAGRAM
Refer to TRAC OFF Indicator Light Remains ON (See page BC-157).
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