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.
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Other materials:
On-vehicle inspection
1. INSPECT CURTAIN SHIELD AIRBAG ASSEMBLY
(VEHICLE NOT INVOLVED IN COLLISION)
Perform a diagnostic system check.
With the curtain shield airbag assembly installed on
the vehicle, perform a visual check. If there are any
defects as mentioned below, replace the front pillar
...
Camshaft Position Sensor
DTC P0365 Camshaft Position Sensor "B" Circuit (Bank 1)
DTC P0367 Camshaft Position Sensor "B" Circuit Low
Input (Bank 1)
DTC P0368 Camshaft Position Sensor "B" Circuit High
Input (Bank 1)
DTC P0390 Camshaft Position Sensor "B" Circuit (Bank 2)
DTC P0392 ...
Internal Control Module Random Access Memory
(RAM) Error
DTC P0604 Internal Control Module Random Access Memory
(RAM) Error
DESCRIPTION
The ECM continuously monitors its own internal memory status, internal
circuits, and output signals
transmitted to the throttle actuator. This self-check ensures that the ECM is
functioning properly. If any
malfu ...
