LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2004 >> Sienna CE >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Multiplex Communication System - Diagnosis >> Terminals Of Ecu

Terminals Of Ecu

  1. INSPECT INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Locating Instrument Panel Junction Box
    G02934697Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B7 ECU, 1C, 1E, 1K and 1L and 1C J/B connectors.
    2. Check the voltage and resistance between each terminal of the wire harness side connectors and body ground.

      Standard: 

      Fig 2: Connectors Condition Table
      G02934698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  2. CHECK AIRBAG SENSOR ASSY (AIRBAG ECU) 
    1. Disconnect the A21 ECU connector.
      2. Fig 3: Disconnecting A21 ECU Connector
      G02934699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side.

      Standard: 

      TERMINALS WIRING COLOR CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      IG2 (A21-5) - E1 (A21-27) B-O - W-B Ignition Switch OFF --> ON 10 to 14 V
      IG2 (A21-5) - E2 (A21-28) B-O - W-B Ignition Switch OFF --> ON 10 to 14 V
      MPX1 (A21-24) - Body ground R-L - Body ground Constant 10 kΩ or higher
      MPX2 (A21-22) - Body ground R-L - Body ground Constant 10 kΩ or higher
      TERMINALS RESISTANCE

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      E1 (A21-27) - Body ground W-B - Body ground Constant Below 1 Ω
      E2 (A21-28) - Body ground W-B - Body ground Constant Below 1 Ω

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

  3. CHECK ECM 
    1. Disconnect the E4, E5 and E6 ECM connectors.
      2. Fig 4: Disconnecting E4, E5 & E6 ECM Connectors
      G02934700Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      ECM CONNECTORS WIRING COLOR CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      BATT (E4-3) - E1 (E6-1) B-W - BR Constant 10 to 14 V
      +BM (E5-6) - ME01 (E6-4) R - W-B Constant 10 to 14 V
      IGSW (E4-9) - E1 (E6-1) B-O - BR Ignition Switch OFF --> ON 10 to 14 V
      +B (E4-1) - E1 (E6-1) B-R - BR Ignition Switch OFF --> ON 10 to 14 V
      +B2 (E4-2) - E1 (E6-1) B-R - BR Ignition Switch OFF --> ON 10 to 14 V
      MPX1 (E5-18) - Body ground R-L - Body ground Constant 10 kΩ or higher
      MPX2 (E5-29) - Body ground V - Body ground Constant 10 kΩ or higher
      E1 (E6-1) - Body ground BR - Body ground Constant Below 1 Ω
      ME01 (E6-4) - Body ground W-B - Body ground Constant Below 1 Ω

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

  4. CHECK A/C AMPLIFIER ASSY (A/C ECU) 
    1. Disconnect the A9 ECU connector.
      2. Fig 5: Locating A9 ECU Connector
      G02934701Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      A9 ECU CONNECTOR CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      +B (A9-11) - GND (A9-1) W-L - W-B Constant 10 to 14 V
      IG+ (A9-40) - GND (A9-1) R-Y - W-B Ignition Switch OFF --> ON 10 to 14 V
      ACC (A9-12) - GND (A9-1) P - W-B Ignition Switch OFF --> ACC or ON 10 to 14 V
      MPX+ (A9-2) - Body ground V - Body ground Constant 10 kΩ or higher
      MPX- (A9-3) - Body ground R-L - Body ground Constant 10 kΩ or higher
      GND (A9-1) - Body ground W-B - Body grond Constant Below 1 Ω

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

  5. CHECK COMBINATION METER 
    1. Disconnect the C10 meter connector.
      2. Fig 6: Locating C10 Meter Connector
      G02934702Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side connector.

      Standard: 

      C10 METER CONNECTOR CONDITION (10F2)

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      +B (C10-12) - ES (C10-30) W-L - BR Constant 10 to 14 V
      IG+ (C10-32) - ES (C10-30) B-R - BR Ignition Switch OFF --> ON 10 to 14 V
      MPX1 (C10-29) - Body ground V - Body ground Constant 10 kΩ or higher
      MPX2 (C10-28) - Body ground R-L - Body ground Constant 10 kΩ or higher
      ES (C10-30) - Body ground BR - Body ground Constant Below 1 Ω

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

  6. CHECK MULTIPLEX NETWORK DOOR ECU REAR RH (POWER SLIDE DOOR ECU RH) 
    1. Disconnect the P27 and P28 ECU connectors.
      2. Fig 7: Locating P28 & P27 ECU Connectors
      G02934703Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side connectors.

      Standard: 

      P27, P28 TERMINAL CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      B (P28-2) - GND (P28-8) B - W-B Constant 10 to 14 V
      ECUB (P27-10) - GND (P28-8) W - W-B Constant 10 to 14 V
      MPX1 (P27-22) - Body ground R - Body ground Constant 10 kΩ or higher
      GND (P28-8) - Body ground W-B - Body ground Constant Below 1 Ω

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

  7. CHECK MULTIPLEX NETWORK DOOR ECU REAR LH (POWER SLIDE DOOR ECU LH) 
    1. Disconnect the P25 and P26 ECU connectors.
      2. Fig 8: Locating P26 & P25 ECU Connectors
      G02934704Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side connectors.

      Standard: 

      P25, P26 TERMINAL CONDITION (1 OF 2)

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      B (P26-2) - GND (P26-8) B-W - W-B Constant 10 to 14 V
      ECUB (P25-10) - GND (P26-8) W - W-B Constant 10 to 14 V
      MPX1 (P25-22) - Body ground R - Body ground Constant 10 kΩ or higher
      GND (P26-8) - Body ground W-B - Body ground Constant Below 1 Ω

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

  8. CHECK MULTIPLEX NETWORK DOOR ECU BACK (POWER BACK DOOR ECU) 
    1. Disconnect the P13 and P14 ECU connectors.
      2. Fig 9: Locating P13 & P14 ECU Connectors
      G02934705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage and resistance of each terminal of the wire harness side connectors.

      Standard: 

      P13 P14 TERMINALS STANDARD

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      B (P14-2) - GND (P14-8) B-R - W-B Constant 10 to 14 V
      ECUB (P13-10) - GND (P14-8) W-L - W-B Constant 10 to 14 V
      IG (P13-9) GND (P14-8) B-R - W-B Ignition Switch OFF --> ON 10 to 14 V
      MPX1 (P13-22) - Body ground R - Body ground Constant 10 kΩ or higher
      GND (P14-8) - Body ground W-B - Body ground Constant Below 1 Ω

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

scientia non olet · About LEMON Manuals