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Terminals Of Ecu

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  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    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
    1. Disconnect the 2A, 2B, 2C, 2E and L8 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
    2. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2A-43 - Body ground G - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      2B-25 - Body ground B - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      2C-18 (BECU) - Body ground Y - Body ground Battery power supply Always 11 to 14 V
      2E-1 - Body ground W - Body ground Battery power supply Always 11 to 14 V

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

    3. Measure the resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2B-6 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L8-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the 2A, 2B, 2C, 2E and L8 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
    5. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2A-52 (ILE) - Body ground L - Body ground Interior lights drive output Interior lights off 11 to 14 V
      Interior lights on Below 1 V
      2B-17 (FSPT)*1 - Body ground L - Body ground Front passenger footwell light drive output Front passenger footwell light off 11 to 14 V
      Front passenger footwell light on Below 1 V
      2B-18 (FSPT)*1 - Body ground L - Body ground Driver footwell light drive output Driver footwell light off 11 to 14 V
      Driver footwell light on Below 1 V
      2B-29 (LSR) - Body ground GR - Body ground Rear door unlock detection switch RH input Rear door RH and LH locked Pulse generation
      Rear door RH or LH unlocked Below 1 V
      2D-25 (LSR) - Body ground GR - Body ground Rear door unlock detection switch LH input Rear door LH and RH locked Pulse generation
      Rear door LH or RH unlocked Below 1 V
      2D-35 (FLCY) - Body ground V - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      2D-36 (FRCY) - Body ground BR - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      L7-6 (LRCY) - Body ground G - Body ground Rear door courtesy light switch RH or LH input Rear door RH or LH open Below 1 V
      Rear door RH and LH closed Pulse generation
      L7-7 (LSFL) - Body ground GR - Body ground Front door unlock detection switch LH input Front door LH locked Pulse generation
      Front door LH unlocked Below 1 V
      L7-18 (LSFR) - Body ground LG - Body ground Front door unlock detection RH switch input Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      L7-19 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed and luggage compartment light switch off Pulse generation
      Back door closed and luggage compartment light switch on 11 to 14 V
      • *1: w/ Footwell Light
      • If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction.
  2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    Fig 2: Main Body ECU (Multiplex Network Body ECU) (With 1 Connector) 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
    1. Disconnect the 2A, 2B, 2C and 2E instrument panel junction block assembly connectors.
    2. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2A-43 - Body ground G - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      2B-25 - Body ground B - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      2C-18 (BECU) - Body ground Y - Body ground Battery power supply Always 11 to 14 V
      2E-1 - Body ground W - Body ground Battery power supply Always 11 to 14 V

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

    3. Measure the resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2B-6 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the 2A, 2B, 2C and 2E instrument panel junction block assembly connectors.
    5. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2A-52 (ILE) - Body ground L - Body ground Interior lights drive output Interior lights off 11 to 14 V
      Interior lights on Below 1 V
      2B-17 (FSPT)*1 - Body ground L - Body ground Front passenger footwell light drive output Front passenger footwell light off 11 to 14 V
      Front passenger footwell light on Below 1 V
      2B-18 (FSPT)*1 - Body ground L - Body ground Driver footwell light drive output Driver footwell light off 11 to 14 V
      Driver footwell light on Below 1 V
      2B-29 (LSR) - Body ground GR - Body ground Rear door unlock detection switch RH input Rear door RH and LH locked Pulse generation
      Rear door RH or LH unlocked Below 1 V
      2D-25 (LSR) - Body ground GR - Body ground Rear door unlock detection switch LH input Rear door LH and RH locked Pulse generation
      Rear door LH or RH unlocked Below 1 V
      2D-35 (FLCY) - Body ground V - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      2D-36 (FRCY) - Body ground BR - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      L7-6 (LRCY) - Body ground G - Body ground Rear door courtesy light switch RH or LH input Rear door RH or LH open Below 1 V
      Rear door RH and LH closed Pulse generation
      L7-7 (LSFL) - Body ground GR - Body ground Front door unlock detection switch LH input Front door LH locked Pulse generation
      Front door LH unlocked Below 1 V
      L7-18 (LSFR) - Body ground LG - Body ground Front door unlock detection RH switch input Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      L7-19 (BCTY) - Body ground L - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed and luggage compartment light switch off Pulse generation
      Back door closed and luggage compartment light switch on 11 to 14 V
      • *1: w/ Footwell Light
      • If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may have a malfunction.
  3. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.
      Fig 3: Certification ECU Connector Terminal Identification
      GTY219896Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L62-1 (+B) - Body ground B - Body ground +B power supply Always 11 to 14 V

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

    3. Measure the resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L62-15 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the L62 certification ECU (smart key ECU assembly) connector.
    5. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L62-11 (SWIL) - Body ground G - Body ground Power switch illumination drive output Power switch illumination on 11 to 14 V or pulse generation
      Power switch illumination off 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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