Toyota Sienna Service Manual: Terminals of ECU
1. CHECK TRANSPONDER KEY AMPLIFIER
- Disconnect the I14 amplifier connector and measure the resistance between the terminal of the wire harness side connector and body ground.
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the I14 amplifier connector and measure the resistance and voltage of each terminal of the connector
If the result is not as specified, the amplifier may have a malfunction.
- Inspect using an oscilloscope.
- Waveform 1 (Reference):
- Waveform 2 (Reference):
2. CHECK TRANSPONDER KEY ECU ASSEMBLY
- Disconnect the T6 ECU connector and measure the resistance and voltage between each terminal of the wire harness side connector
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the T9 ECU connector and measure the voltage of each terminal of the connector.
If the result is not as specified, the ECU may have a malfunction.
- Inspect using an oscilloscope.
- Wave form 1 (Reference):
- Wave form 2 (Reference):
- Wave form 3 (Reference):
- Wave form 4 (Reference):
3. CHECK ECM
- Disconnect the E11 ECM connector and measure the resistance between the terminal of the wire harness side connector and body ground.
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the E11 ECM. Measure the voltage between each terminal of the connector according to the value(s) in the table below.
If the result is not as specified, there may be a malfunction on the wire harness side.
- Inspect using an oscilloscope.
- Waveform 1 (Reference):
- Waveform 2 (Reference):
Problem symptoms table
ENGINE IMMOBILISER SYSTEM
...
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.
...
Other materials:
Repeat play
Select to change on/off.
Using cellular phones
Interference may be heard through the audio system’s speakers if a cellular
phone is being used inside or close to the vehicle while the audio system is
operating.
Certification (caution)
Laser product
This product is a class 1 laser product.
...
Input instructions
(a) The general VIN input instructions using the
intelligent tester are shown below:
(b) The arrow buttons (UP, DOWN, RIGHT and LEFT)
and numerical buttons (0 to 9) are used to input the
VIN.
(c) Cursor Operation
To move the cursor around the tester screen, press
the RIGHT and LEFT buttons. ...
Driver Side Seat Belt Warning Light does not Operate
DESCRIPTION
When turning the ignition switch to the ON position, the combination meter
assembly communicates with
the supplemental restraint system by the multiplex communication system. Unless
the driver side seat
belt is fastened, the combination meter assembly will turn on the seat belt
...
