Toyota RAV4 manuals

Toyota Sienna Service Manual: Terminals of ECU

1. CHECK TRANSPONDER KEY AMPLIFIER

CHECK TRANSPONDER KEY AMPLIFIER

  1. Disconnect the I14 amplifier connector and measure the resistance between the terminal of the wire harness side connector and body ground.

CHECK TRANSPONDER KEY AMPLIFIER

If the result is not as specified, there may be a malfunction on the wire harness side.

  1.  Reconnect the I14 amplifier connector and measure the resistance and voltage of each terminal of the connector

CHECK TRANSPONDER KEY AMPLIFIER

If the result is not as specified, the amplifier may have a malfunction.

CHECK TRANSPONDER KEY AMPLIFIER

  1.  Inspect using an oscilloscope.
  1.  Waveform 1 (Reference):

CHECK TRANSPONDER KEY AMPLIFIER

CHECK TRANSPONDER KEY AMPLIFIER

  1. Waveform 2 (Reference):

CHECK TRANSPONDER KEY AMPLIFIER

2. CHECK TRANSPONDER KEY ECU ASSEMBLY

CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. Disconnect the T6 ECU connector and measure the resistance and voltage between each terminal of the wire harness side connector

CHECK TRANSPONDER KEY ECU ASSEMBLY

If the result is not as specified, there may be a malfunction on the wire harness side.

  1.  Reconnect the T9 ECU connector and measure the voltage of each terminal of the connector.

CHECK TRANSPONDER KEY ECU ASSEMBLY

CHECK TRANSPONDER KEY ECU ASSEMBLY

If the result is not as specified, the ECU may have a malfunction.

CHECK TRANSPONDER KEY ECU ASSEMBLY

  1.  Inspect using an oscilloscope.
  1.  Wave form 1 (Reference):

CHECK TRANSPONDER KEY ECU ASSEMBLY

CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. Wave form 2 (Reference):

CHECK TRANSPONDER KEY ECU ASSEMBLY

CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. Wave form 3 (Reference):

CHECK TRANSPONDER KEY ECU ASSEMBLY

CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. Wave form 4 (Reference):

CHECK TRANSPONDER KEY ECU ASSEMBLY

3. CHECK ECM

CHECK ECM

  1. Disconnect the E11 ECM connector and measure the resistance between the terminal of the wire harness side connector and body ground.

CHECK ECM

If the result is not as specified, there may be a malfunction on the wire harness side.

  1. Reconnect the E11 ECM. Measure the voltage between each terminal of the connector according to the value(s) in the table below.

CHECK ECM

If the result is not as specified, there may be a malfunction on the wire harness side.

CHECK ECM

  1. Inspect using an oscilloscope.
  1.  Waveform 1 (Reference):

CHECK ECM

CHECK ECM

  1. 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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