LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2013 >> Prius Plug-in >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Lin Communication System (Diagnostics - Introduction) (Plug-In) >> Lin Communication System >> Terminals Of Ecu >> Terminals Of Ecu
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu

  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Disconnect the 2C and 2B instrument panel junction block assembly connectors.
      Fig 1: Identifying 2C And 2B Instrument Panel Junction Block Assembly Connectors
      GTY219007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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
      2C-18 (BECU) - Body ground Y - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      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.

    3. Reconnect the 2C and 2B instrument panel junction block assembly connectors.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2D-26 (LIN2) - 2B-6 (GND1) P - W-B LIN communication line Power switch on (IG) Pulse generation
      2A-27 (LIN2) - 2B-6 (GND1) P - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.

  2. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side) 
    1. Disconnect the O2 power window regulator motor assembly (for driver side) connector.
      Fig 2: Identifying O2 Power Window Regulator Motor Assembly (For Driver Side) Connector
      GTY227476Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      O2-2 (B) - O2-1 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      O2-1 (GND) - 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.

    3. Reconnect the O2 power window regulator motor assembly (for driver side) connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      O2-9 (LIN) - O2-1 (GND) B - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the power window regulator motor assembly (for driver side) may be malfunctioning.

  3. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Side) 
    1. Disconnect the N2 power window regulator motor assembly (for front passenger side) connector.
      Fig 3: Identifying N2 Power Window Regulator Motor Assembly (For Front Passenger Side) Connector
      GTY227477Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      N2-2 (B) - N2-1 (GND) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      N2-1 (GND) - 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.

    3. Reconnect the N2 power window regulator motor assembly (for front passenger side) connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      N2-9 (LIN) - N2-1 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the power window regulator motor assembly (for front passenger side) may be malfunctioning.

  4. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Side) 
    1. Disconnect the P4 power window regulator motor assembly (for rear RH side) connector.
      Fig 4: Identifying P4 Power Window Regulator Motor Assembly (For Rear RH Side) Connector
      GTY227478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P4-2 (B) - P4-1 (GND) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      P4-1 (GND) - 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.

    3. Reconnect the P4 power window regulator motor assembly (for rear RH side) connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P4-9 (LIN) - P4-1 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the power window regulator motor assembly (for rear RH side) may be malfunctioning.

  5. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Side) 
    1. Disconnect the Q4 power window regulator motor assembly (for rear LH side) connector.
      Fig 5: Identifying Q4 Power Window Regulator Motor Assembly (For Rear LH Side) Connector
      GTY227479Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      Q4-2 (B) - Q4-1 (GND) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      Q4-1 (GND) - 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.

    3. Reconnect the Q4 power window regulator motor assembly (for rear LH side) connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      Q4-9 (LIN) - Q4-1 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the power window regulator motor assembly (for rear LH side) may be malfunctioning.

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    1. Disconnect the O6 multiplex network master switch assembly connector.
      Fig 6: Identifying O6 Multiplex Network Master Switch Assembly Connector
      GTY236034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      O6-11 (B) - O6-12 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      O6-12 (GND) - 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.

    3. Reconnect the O6 multiplex network master switch assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      O6-17 (LIN1) - O6-12 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the multiplex network master switch assembly may be malfunctioning.

  7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.
      Fig 7: ECU Connector Terminal Identification - Certification ECU (Smart Key Assembly)
      GTY232891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L62-1 (+B) - L62-15 (E) B - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      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.

    3. Reconnect the L62 certification ECU (smart key ECU assembly) connector.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L62-16 (IG) - L62-15 (E) BE - W-B Power switch power supply Power switch on (IG) 11 to 14 V
      L62-16 (IG) - L62-15 (E) BE - W-B Power switch power supply Power switch off Below 1 V
      L62-29 (LIN) - L62-15 (E) L - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the certification ECU (smart key ECU assembly) may be malfunctioning.

  8. CHECK ID CODE BOX (IMMOBILISER CODE ECU) (for Canada) 
    1. Disconnect the L10 ID code box (immobiliser code ECU) connector.
      Fig 8: Identifying L10 ID Code Box (Immobiliser Code ECU) Connector
      GTY215554Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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 connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L10-1 (+B) - L10-8 (GND) B - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      L10-8 (GND) - 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.

    3. Reconnect the L10 ID code box (immobiliser code ECU) connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L10-3 (LIN1) - L10-8 (GND) L - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the ID code box (immobiliser code ECU) may be malfunctioning.

  9. CHECK TRANSMISSION CONTROL ECU ASSEMBLY 
    1. Disconnect the A23 and A24 transmission control ECU assembly connectors.
      Fig 9: Identifying A23 And A24 Transmission Control ECU Assembly Connectors
      GTY215415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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
      A23-15 (BATT) - Body ground SB - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      A24-1 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
      A24-5 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A24-6 (E01) - 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.

    3. Reconnect the A23 and A24 transmission control ECU assembly connectors.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A24-24 (LIN) - A24-1 (E1) L - BR LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the transmission control ECU assembly may be malfunctioning.

  10. CHECK POWER MANAGEMENT CONTROL ECU 
    1. Disconnect the L135 and L136 power management control ECU connectors.
      Fig 10: Identifying Power Management Control ECU Connector Terminal Identification
      GTY340218Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. 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
      L135-1 (AM22) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      L136-7 (AM21) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      L135-6 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the L135 and L136 power management control ECU connectors.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L136-11 (LIN2) - L135-6 (E1) L - BR LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the power management control ECU may be malfunctioning.

scientia non olet · About LEMON Manuals