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Terminals Of Ecu

WARNING: This page is about a different variant/trim than selected.
  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Disconnect the 2B and 2C junction block connectors.
      Fig 1: Main Body ECU (Multiplex Network Body ECU) (With 3 Connectors) Connector Terminal Identification
      GTY332973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A Main body ECU (multiplex network body ECU) with 3 connectors - -
      *1 Main body ECU (multiplex network body ECU) *2 3 connectors
      Fig 2: Main body ECU With 1 Connector (Multiplex Network Body ECU) Connector Terminal Identification
      GTY325266Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *A Main body ECU (multiplex network body ECU) with 1 connector - -
      *1 Main body ECU (multiplex network body ECU) *2 1 connector
    2. Disconnect the A main body ECU connector.
    3. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connectors disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2B-6 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      2C-18 (BECU) - Body ground Y - Body ground Battery power supply Power switch off 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Power switch on (ACC) 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Power switch off Below 1 V
      A-31 (ALTB) - Body ground - Battery power supply Power switch off 11 to 14 V
      A-32 (IG) - Body ground - Power switch power supply Power switch on (IG) 11 to 14 V
      A-32 (IG) - Body ground - Power switch power supply Power switch off Below 1 V

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

    4. Reconnect the 2B and 2C junction block connectors.
    5. Reconnect the A main body ECU connector.
    6. Measure the voltage according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2B-1 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output (except driver side) Driver or front passenger side door control switch off Below 1 V
      2B-1 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output (except driver side) Driver or front passenger side door control switch unlocked 11 to 14 V
      2B-8 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Driver or front passenger side door control switch off Below 1 V
      2B-8 (ACT+) - Body ground L - Body ground Door lock motor lock drive output (all doors) Driver or front passenger side door control switch locked 11 to 14 V
      2B-5 (ACTD) - Body ground B - Body ground Driver side door lock motor unlock drive output Driver or front passenger side door control switch off Below 1 V
      2B-5 (ACTD) - Body ground B - Body ground Driver side door lock motor unlock drive output Driver or front passenger side door control switch unlocked 11 to 14 V
      2D-36 (FRCY) - Body ground BR - Body ground Front passenger side door courtesy switch input Front passenger side door open Below 1 V
      2D-36 (FRCY) - Body ground BR - Body ground Front passenger side door courtesy switch input Front passenger side door closed 11 to 14 V
      2D-35 (FLCY) - Body ground V - Body ground Driver side door courtesy switch input Driver door open Below 1 V
      2D-35 (FLCY) - Body ground V - Body ground Driver side door courtesy switch input Driver door closed 11 to 14 V
      2D-25 (LSR) - Body ground GR - Body ground Rear door LH lock position switch input Rear door LH unlocked Below 1 V
      2D-25 (LSR) - Body ground GR - Body ground Rear door LH lock position switch input Power switch off, all doors closed and rear door LH locked 11 to 14 V
      2B-29 (LSR) - Body ground GR - Body ground Rear door RH lock position switch input Rear door RH unlocked Below 1 V
      2B-29 (LSR) - Body ground GR - Body ground Rear door RH lock position switch input Power switch off, all doors closed and rear door RH locked 11 to 14 V
      L7-6 (LRCY) - Body ground G - Body ground Rear door courtesy light switch input Rear door open Below 1 V
      L7-6 (LRCY) - Body ground G - Body ground Rear door courtesy light switch input Rear door closed 11 to 14 V
      L7-7 (LSFL) - Body ground GR - Body ground Driver door lock position switch input Driver door unlocked Below 1 V
      L7-7 (LSFL) - Body ground GR - Body ground Driver door lock position switch input Power switch off, all doors closed and driver door locked 11 to 14 V
      L7-9 (L1) - Body ground LG - Body ground Front passenger side door control switch input Front passenger side door control switch locked Below 1 V
      L7-9 (L1) - Body ground LG - Body ground Front passenger side door control switch input Front passenger side door control switch off 11 to 14 V
      L7-10 (UL1) - Body ground BR - Body ground Front passenger side door control switch input Front passenger side door control switch unlocked Below 1 V
      L7-10 (UL1) - Body ground BR - Body ground Front passenger side door control switch input Front passenger side door control switch off 11 to 14 V
      L7-11 (L2) - Body ground G - Body ground Driver door key-linked lock input Driver door key cylinder turned to lock Below 1 V
      L7-11 (L2) - Body ground G - Body ground Driver door key-linked lock input Driver door key cylinder off 11 to 14 V
      L7-18 (LSFR) - Body ground LG - Body ground Front passenger side door lock position switch input Front passenger side door unlocked Below 1 V
      L7-18 (LSFR) - Body ground LG - Body ground Front passenger side door lock position switch input Power switch off, all doors closed and front passenger side door locked 11 to 14 V
      L7-19 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door open Below 1 V
      L7-19 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door closed 11 to 14 V
      L7-23 (BDSU) - Body ground*1 GR - Body ground Back door opener switch input Back door opener switch pushed Below 1 V
      L7-23 (BDSU) - Body ground*1 GR - Body ground Back door opener switch input Back door opener switch not pushed 11 to 14 V
      L7-24 (UL3) - Body ground V - Body ground Driver door key-linked unlock input Driver door key cylinder turned to unlock Below 1 V
      L7-24 (UL3) - Body ground V - Body ground Driver door key-linked unlock input Driver door key cylinder off 11 to 14 V
      • *1: w/o Entry System Back Door Open Function

      If the result is not as specified, the main body ECU (multiplex network body ECU) may have a malfunction.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry System Back Door Open Function) 
    Fig 3: ECU Connector Terminal Identification - Certification ECU (Smart Key ECU Assembly)
    GTY219897Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.
    2. Measure the resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L62-22 (TSW5) - Body ground GR - Body ground Back door opener switch signal Back door opener switch on Below 1 Ω
      L62-22 (TSW5) - Body ground GR - Body ground Back door opener switch signal Back door opener switch off 10 kΩ or higher

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

    3. Reconnect the L62 certification ECU (smart key ECU assembly) connector.
    4. Measure the voltage according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L62-22 (TSW5) - Body ground GR - Body ground Back door opener switch signal Back door opener switch off 11 to 14 V
      L62-22 (TSW5) - Body ground GR - Body ground Back door opener switch signal Back door opener switch on Below 1 V

      If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

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