Toyota Sienna Service Manual: Terminals of ECU
1. CHECK INSTRUMENT PANEL J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)
- Disconnect the B6, B7 and B9 ECU connectors.
- Disconnect the 1A, 1C, 1L and 1K J/B connectors.
- Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the B6, B7 and B9 ECU connectors.
- Reconnect the 1A, 1C, 1L and 1K J/B connectors.
- Measure the voltage between each terminal of the connectors and the body ground.
*: with Engine Immobiliser System If the result is not as specified, the J/B assembly (body ECU) may have a malfunction.
- Engine Hood Courtesy Switch Circuit
- Security Horn Circuit
- Ignition Switch Circuit
- Security Indicator Light Circuit
- ECU Power Source Circuit
Problem symptoms table
Proceed to the reference page shown in the table below for
each malfunction symptom and troubleshoot each circuit.
HINT:
Troubleshooting of the theft deterrent system is based on the
premise tha ...
Engine Hood Courtesy Switch Circuit
DESCRIPTION
The engine hood courtesy switch is built in the engine hood lock assembly.
The switch turns on when the
engine hood is opened and turns off when the engine hood is closed.
WIRING DIAG ...
Other materials:
ABS Warning Light Remains ON
DESCRIPTION
If any of the following is detected, the ABS warning light remains on.
The skid control ECU connectors are disconnected from the skid control
ECU.
There is a malfunction in the skid control ECU internal circuit.
There is an open in the harness between the combination meter an ...
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptoms. The potential causes of the symptoms
are listed in order of probability in the ''Suspected Area''
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Rep ...
Side Airbag Sensor Assembly RH Circuit Malfunction
DTC B1140/32 Side Airbag Sensor Assembly RH Circuit Malfunction
DESCRIPTION
The side airbag sensor RH circuit consists of the center airbag sensor
assembly and side airbag sensor
RH.
If the center airbag sensor assembly receives signals from the side airbag
sensor RH, it judges whether or
...
