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:
DRL Relay Circuit
DESCRIPTION
The Multiplex network body ECU controls the DRL No.2 relay
WIRING DIAGRAM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
Connect the intelligent tester to DLC3.
Turn the ignition switch ON and push the intelligent
tester main switch ON.
Sel ...
System description
1. BRIEF DESCRIPTION
The CAN (Controller Area Network) is a serial data
communication system for real time application. It is
a vehicle multiplex communication system which
has a high communication speed (500 kbps) and
the ability to detect malfunctions.
By pairing the CANH and CANL bu ...
Sliding doors
Vehicles without power sliding doors
The sliding doors can be opened and closed using the sliding
door handle. The sliding door can be locked and unlocked using
the wireless remote control, door lock switch or inside lock
knob.
Vehicles with power sliding doors
...
