LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2012 >> Prius Five >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Smart Key System (For Entry Function) (Plug-In) (Diagnostics - Introduction)) >> SMART KEY SYSTEM (for Entry Function) >> Terminals Of Ecu >> Terminals Of Ecu
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    1. Disconnect the L62 certification ECU (smart key ECU assembly) connector.
      Fig 1: L62 Certification ECU (Smart Key ECU Assembly) Connector Terminal Identification
      GTY219898Courtesy 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) - Body ground B - Body ground +B power supply Power switch off 11 to 14 V
      L62-15 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L62-17 (CUTB) - Body ground Y - Body ground Dark current cut fuse pin input signal Always 11 to 14 V

      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
      L62-3 (CLG1) - L62-15 (E) G - W-B Door electrical key oscillator (for driver side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      		 No pulse generation
      L62-3 (CLG1) - L62-15 (E) G - W-B Door electrical key oscillator (for driver side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • All doors locked by wireless lock function
      		 Pulse generation
      L62-4 (CG1B) - L62-15 (E) R - W-B Door electrical key oscillator (for driver side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      		 No pulse generation
      L62-4 (CG1B) - L62-15 (E) R - W-B Door electrical key oscillator (for driver side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • All doors locked by wireless lock function
      		 Pulse generation
      L62-5 (CLG2)* - L62-15 (E) G - W-B Door electrical key oscillator (for front passenger side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      		 No pulse generation
      L62-5 (CLG2)* - L62-15 (E) G - W-B Door electrical key oscillator (for front passenger side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • All doors locked by wireless lock function
      		 Pulse generation
      L62-6 (CG2B)* - L62-15 (E) R - W-B Door electrical key oscillator (for front passenger side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      		 No pulse generation
      L62-6 (CG2B)* - L62-15 (E) R - W-B Door electrical key oscillator (for front passenger side) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • All doors locked by wireless lock function
      		 Pulse generation
      L62-7 (CLG5) - L62-15 (E) G - W-B No. 1 indoor electrical key antenna assembly (for front floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) not touched
      		 No pulse generation
      L62-7 (CLG5) - L62-15 (E) G - W-B No. 1 indoor electrical key antenna assembly (for front floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) touched
      		 Pulse generation
      L62-8 (CG5B) - L62-15 (E) R - W-B No. 1 indoor electrical key antenna assembly (for front floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) not touched
      		 No pulse generation
      L62-8 (CG5B) - L62-15 (E) R - W-B No. 1 indoor electrical key antenna assembly (for front floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) touched
      		 Pulse generation
      L62-16 (IG) - Body ground BE - Body ground IG power supply Power switch off Below 1 V
      L62-16 (IG) - Body ground BE - Body ground IG power supply Power switch on (IG) 11 to 14 V
      L62-18 (TSW1) - L62-15 (E) B - W-B Lock sensor (for driver side) detection signal
      • Power switch off
      • All doors closed
      • Lock sensor (for driver side) not touched
      		 Pulse generation
      L62-18 (TSW1) - L62-15 (E) B - W-B Lock sensor (for driver side) detection signal
      • Power switch off
      • All doors closed
      • Lock sensor (for driver side) touched
      		 Below 2 V
      L62-19 (TSW2)* - L62-15 (E) B - W-B Lock sensor (for front passenger side) detection signal
      • Power switch off
      • All doors closed
      • Lock sensor (for front passenger side) not touched
      		 Pulse generation
      L62-19 (TSW2)* - L62-15 (E) B - W-B Lock sensor (for front passenger side) detection signal
      • Power switch off
      • All doors closed
      • Lock sensor (for front passenger side) touched
      		 Below 2 V
      L62-20 (SEN1) - L62-15 (E) Y - W-B Touch sensor (for driver side) detection signal
      • Power switch off
      • All doors closed
      • Key not in detection area
      • Touch sensor (for driver side) not touched
      		 Pulse generation
      L62-20 (SEN1) - L62-15 (E) Y - W-B Touch sensor (for driver side) detection signal
      • Power switch off
      • All doors closed
      • Key not in detection area
      • Touch sensor (for driver side) touched
      		 Below 2 V
      L62-21 (SEN2)* - L62-15 (E) Y - W-B Touch sensor (for front passenger side) detection signal
      • Power switch off
      • All doors closed
      • Key not in detection area
      • Touch sensor (for front passenger side) not touched
      		 Pulse generation
      L62-21 (SEN2)* - L62-15 (E) Y - W-B Touch sensor (for front passenger side) detection signal
      • Power switch off
      • All doors closed
      • Key not in detection area
      • Touch sensor (for front passenger side) touched
      		 Below 2 V
      L62-22 (TSW5)* - L62-15 (E) GR - W-B Back door opener switch assembly (opener switch) signal Back door opener switch assembly (opener switch) not pushed Pulse generation
      L62-22 (TSW5)* - L62-15 (E) GR - W-B Back door opener switch assembly (opener switch) signal Back door opener switch assembly (opener switch) pushed Below 1 V
      L62-23 (TSW6)* - L62-15 (E) LG - W-B Back door opener switch assembly (lock switch) signal Back door opener switch assembly (lock switch) not pushed Pulse generation
      L62-23 (TSW6)* - L62-15 (E) LG - W-B Back door opener switch assembly (lock switch) signal Back door opener switch assembly (lock switch) pushed Below 1 V
      L62-24 (CLG6) - L62-15 (E) GR - W-B No. 2 indoor electrical key antenna assembly (for center floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) not touched
      		 No pulse generation
      L62-24 (CLG6) - L62-15 (E) GR - W-B No. 2 indoor electrical key antenna assembly (for center floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) touched
      		 Pulse generation
      L62-25 (CG6B) - L62-15 (E) BR - W-B No. 2 indoor electrical key antenna assembly (for center floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) not touched
      		 No pulse generation
      L62-25 (CG6B) - L62-15 (E) BR - W-B No. 2 indoor electrical key antenna assembly (for center floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) touched
      		 Pulse generation
      L62-26 (CLG7) - L62-15 (E) G - W-B No. 3 indoor electrical key antenna assembly (for rear floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) not touched
      		 No pulse generation
      L62-26 (CLG7) - L62-15 (E) G - W-B No. 3 indoor electrical key antenna assembly (for rear floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) touched
      		 Pulse generation
      L62-27 (CG7B) - L62-15 (E) R - W-B No. 3 indoor electrical key antenna assembly (for rear floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) not touched
      		 No pulse generation
      L62-27 (CG7B) - L62-15 (E) R - W-B No. 3 indoor electrical key antenna assembly (for rear floor) sensor signal
      • Power switch off
      • All doors closed
      • Key not in cabin
      • Door outside handle assembly (lock sensor) touched
      		 Pulse generation
      L62-32 (POS1) - L62-15 (E) L - W-B Lock or unlock sensor (for driver side) output signal Power switch off 9 to 14 V
      L62-32 (POS1) - L62-15 (E) L - W-B Lock or unlock sensor (for driver side) output signal Power switch on (IG) Below 2 V
      L62-33 (POS2)* - L62-15 (E) L - W-B Lock or unlock sensor (for front passenger side) output signal Power switch off 9 to 14 V
      L62-33 (POS2)* - L62-15 (E) L - W-B Lock or unlock sensor (for front passenger side) output signal Power switch on (IG) Below 2 V
      L63-5 (RC0) - L62-15 (E) R - W-B Door control receiver power source
      • Power switch off
      • Lock or unlock switch on key not pushed
      		 Below 1 V
      L63-5 (RC0) - L62-15 (E) R - W-B Door control receiver power source
      • Power switch off
      • Lock or unlock switch on key pushed
      		 4.5 to 5.5 V
      L63-15 (RDA) - L62-15 (E) Y - W-B Door control receiver data input signal
      • Power switch off
      • All doors closed
      • Transmitter switch not pressed
      		 11 to 14 V pulse generation at regular intervals
      L63-15 (RDA) - L62-15 (E) Y - W-B Door control receiver data input signal
      • Power switch off
      • All doors closed
      • Transmitter switch pressed
      		 Pulse generation
      L63-16 (RSSI) - L62-15 (E) V - W-B Door control receiver electric wave existence signal
      • Power switch off
      • All doors locked
      • Lock or unlock switch on key not pushed
      		 11 to 14 V
      L63-16 (RSSI) - L62-15 (E) V - W-B Door control receiver electric wave existence signal
      • Power switch off
      • All doors locked
      • Lock or unlock switch on key pushed
      		 Below 2 V
      L63-19 (CLG8)* - L62-15 (E) G - W-B Electrical key antenna (for rear side) sensor signal
      • Power switch off
      • All doors closed
      • Back door opener switch assembly off
      		 No pulse generation
      L63-19 (CLG8)* - L62-15 (E) G - W-B Electrical key antenna (for rear side) sensor signal
      • Power switch off
      • All doors closed
      • Back door opener switch assembly on
      		 Pulse generation
      L63-20 (CG8B)* - L62-15 (E) R - W-B Electrical key antenna (for rear side) sensor signal
      • Power switch off
      • All doors closed
      • Back door opener switch assembly off
      		 No pulse generation
      L63-20 (CG8B)* - L62-15 (E) R - W-B Electrical key antenna (for rear side) sensor signal
      • Power switch off
      • All doors closed
      • Back door opener switch assembly on
      		 Pulse generation
      • *: w/ Entry System Back Door Open Function

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

  2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Disconnect the 2B and 2C junction block connectors.
      Fig 2: 2B And 2C Junction Block Connector Terminal Identification
      GTY218990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 BECU 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 - ALTB 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* GR - Body ground Back door opener switch input Back door opener switch pushed Below 1 V
      L7-23 (BDSU) - Body ground* 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
      • *: 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.

  3. COMBINATION METER ASSEMBLY 
    1. Disconnect the L27 combination meter assembly connector.
      Fig 3: L27 Combination Meter Assembly Connector Terminal Identification
      GTY219727Courtesy 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
      L27-18 (B) - Body ground R - Body ground B power supply Power switch off 11 to 14 V
      L27-30 (ES) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 Ω

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

    3. Reconnect the L27 combination meter assembly connector.
    4. Measure the voltage according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L27-19 (IG+) - Body ground L - Body ground Power switch signal Power switch off Below 1 V
      L27-19 (IG+) - Body ground L - Body ground Power switch signal Power switch on (IG) 11 to 14 V

      If the result is not as specified, the combination meter assembly may have a malfunction.

scientia non olet · About LEMON Manuals