Toyota Sienna Quiz
Multiplex communication

Terminals of ECU

In this manual: Multiplex communication
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
22steps
~132min
4/5difficulty
Done 0 of 22

1. MULTIPLEX NETWORK GATEWAY ECU

  1. Disconnect the G4 ECU connector.
    MULTIPLEX NETWORK GATEWAY ECU
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    MULTIPLEX NETWORK GATEWAY ECU

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
MULTIPLEX NETWORK GATEWAY ECU

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

2. MULTIPLEX NETWORK BODY ECU

  1. Disconnect the B7 ECU, 1A, 1C, 1E, 1K and 1L junction block connectors
    MULTIPLEX NETWORK BODY ECU
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    MULTIPLEX NETWORK BODY ECU

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

  1. Measure the resistance between the specified terminals on the wire harness side connector
MULTIPLEX NETWORK BODY ECU

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

3. AIRBAG SENSOR ASSEMBLY

  1. Disconnect the A21 ECU connector.
    AIRBAG SENSOR ASSEMBLY
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    AIRBAG SENSOR ASSEMBLY

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
AIRBAG SENSOR ASSEMBLY

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

4. SEAT POSITION CONTROL ECU (with Driving Position Memory)

  1. Disconnect the P58 and P59 ECU connectors.
    SEAT POSITION CONTROL ECU
  2. Measure the voltage between the specified terminals on the wire harness side connector.

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
SEAT POSITION CONTROL ECU

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

5. AIR CONDITIONING AMPLIFIER

  1. Disconnect the A9 ECU connector.
    AIR CONDITIONING AMPLIFIER
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    AIR CONDITIONING AMPLIFIER

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
AIR CONDITIONING AMPLIFIER

HINT:
*1: for Automatic A/C
*2: for Manual A/C

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

6. COMBINATION METER

  1. Disconnect the C10 ECU connector.
    COMBINATION METER
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    COMBINATION METER

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
COMBINATION METER

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

7. POWER SLIDE DOOR ECU RH

  1. Disconnect the P27 and P28 ECU connectors.
    POWER SLIDE DOOR ECU RH
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    POWER SLIDE DOOR ECU RH
    POWER SLIDE DOOR ECU RH

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
POWER SLIDE DOOR ECU RH

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

8. POWER SLIDE DOOR ECU LH

  1. Disconnect the P25 and P26 ECU connectors.
    POWER SLIDE DOOR ECU LH
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    POWER SLIDE DOOR ECU LH

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
POWER SLIDE DOOR ECU LH

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

9. POWER BACK DOOR ECU

  1. Disconnect the P13 and P14 ECU connectors.
    POWER BACK DOOR ECU
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    POWER BACK DOOR ECU

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
POWER BACK DOOR ECU

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

10. OUTER MIRROR CONTROL ECU RH (with Driving Position Memory)

  1. Disconnect the O11 ECU connector.
    OUTER MIRROR CONTROL ECU RH
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    OUTER MIRROR CONTROL ECU RH
    OUTER MIRROR CONTROL ECU RH

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

  1. Measure the resistance between the specified terminals on the wire harness side connector.
OUTER MIRROR CONTROL ECU RH

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

11. OUTER MIRROR CONTROL ECU LH (with Driving Position Memory)

  1. Disconnect the O9 ECU connector.
    OUTER MIRROR CONTROL ECU LH
  2. Measure the voltage between the specified terminals on the wire harness side connector.
    OUTER MIRROR CONTROL ECU LH

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

  1. Measure the resistance between the specified terminals on the wire harness side connector
OUTER MIRROR CONTROL ECU LH

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

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