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:
No Signal from Transmitter ID1
DESCRIPTION
The tire pressure warning valve and transmitters that are installed in the
tire and wheel assemblies
measure the air pressure of the tires. The measured values are transmitted to
the tire pressure warning
antenna and receiver on the body as radio waves and then sent to the tir ...
Brake Switch "B" Circuit High
DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while
driving in lock-up condition when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signals to the ECM. Then
the ECM cancels the
operation of the lock-up clutch while ...
On-vehicle inspection
1. INSPECT BRAKE PEDAL HEIGHT
(a) Check the brake pedal height.
Pedal height from dash panel:
150.3 to 160.3 mm (5.917 to 6.311 in.)
NOTICE:
Do not adjust the pedal height. Doing so by
changing the push rod length will structurally
change the pedal ratio.
2. CHECK AND ADJUST STOP LIGHT S ...
