THEFT DETERRENT SYSTEM TERMINALS OF ECU


  1. CHECK BODY ECU AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    B002964C05
    *A for LHD *B for RHD
    *1 Instrument Panel Junction Block Assembly - -
    B00277LC05
    *1 Body ECU - -

    1. Disconnect the G27 body ECU connector.

    2. Remove the body ECU from the instrument panel junction block assembly.


    3. Connect the instrument panel junction block assembly connectors.

    4. Measure the resistance and voltage according to the value(s) in the table below.

      Tech Tips

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

      Terminal No.

      (Symbol)

      		 Wiring Color Terminal Description Condition Specified Condition
      A-6 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-7 (IG) - Body ground - Ignition power supply (IG signal) Ignition switch ON → Off

      11 to 14 V → Below 1 V*1

      10.5 to 16 V → Below 1 V*2
      A-1 (GND) - Body ground - Ground Always Below 1 Ω
      A-18 (DCTY) - Body ground - Driver side door courtesy light switch input Driver side door closed (OFF) → Open (ON) 10 kΩ or higher → Below 1 Ω
      G27-14 (PCTY) - Body ground LG - Body ground Front passenger side door courtesy light switch input Front passenger side door closed (OFF) → Open (ON) 10 kΩ or higher → Below 1 Ω
      A-21 (ACTY) - Body ground - Door courtesy switch signal input except driver door All doors closed except driver door → Any door open except driver door 10 kΩ or higher → Below 1 Ω
      A-20 (HCTY) - Body ground - Engine hood courtesy switch input Engine hood open (OFF) → Closed (ON) 10 kΩ or higher → Below 1 Ω
      G27-8 (KSW) - Body ground*3 G - Body ground Unlock warning switch input Key not in key cylinder (OFF) → Key in key cylinder (ON) 10 kΩ or higher → Below 1 Ω

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

      • *3: w/o Entry and Start System

    5. Connect the body ECU connectors.


    6. 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
      G27-15 (LSWD) - Body ground R - Body ground Driver side door unlock detection switch input Driver side door unlocked Below 1 V
      Driver side door unlock detection switch input Driver side door locked Pulse generation
      G27-17 (IND) - Body ground*1 Y - Body ground Security indicator light illumination

      Security indicator light illuminates

      (It illuminates only for 27.5 seconds in alarm sounding state.)

      		 3 to 10 V
      G27-6 (HAZ) - Body ground SB - Body ground Hazard warning signal output Theft deterrent system in alarm sounding state

      Pulse generation

      (Below 1 V ← → 11 to 14 V)
      2P-14 (SH) - Body ground*5 G - Body ground Security horn drive

      Security horn sounding

      (Theft deterrent system in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 11 to 14 V)
      G28-11 (SSCL) - Body ground*6 G - Body ground Theft warning siren drive Theft warning siren sounding (Theft deterrent system is in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 11 to 14 V)
      2D-14 (HORN) - Body ground

      B - Body ground*3

      GR - Body ground*4

      		 Vehicle horn drive

      Vehicle horns sounding

      (Theft deterrent system in alarm sounding state)

      Pulse generation

      (Below 1 V ← → 11 to 14 V)
      2N-3 (ACT-) - Body ground

      GR - Body ground*7

      LA-W - Body ground*8

      		 Door lock motor unlock drive output Door control switch (power window regulator master switch assembly) or driver door key cylinder off Below 1 V
      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked 11 to 14 V
      2N-2 (ACT+) - Body ground

      LG - Body ground*7

      LA-B - Body ground*8

      		 Door lock motor lock drive output Door control switch (power window regulator master switch assembly) or driver door key cylinder off Below 1 V
      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked 11 to 14 V
      2J-4 (ACTD) - Body ground*9 Y - Body ground Door lock motor unlock drive output (driver door) Door control switch (power window regulator master switch assembly) or driver door key cylinder off Below 1 V
      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked 11 to 14 V
      G27-9 (PRG) - Body ground V - Body ground

      Signal output to door control receiver*1

      Signal output to certification ECU (smart key ECU assembly)*2

      		 Ignition switch off, all doors closed, 10 seconds elapsed after all doors locked and electrical key transmitter sub-assembly unlock switch not pressed 11 to 14 V
      Ignition switch off, all doors closed, 10 seconds elapsed after all doors locked and electrical key transmitter sub-assembly unlock switch pressed Pulse generation
      G27-16 (RDA) - Body ground W - Body ground

      Signal input from door control receiver*1

      Signal input from certification ECU (smart key ECU assembly)*2

      		 Ignition switch off, all doors closed, 10 seconds elapsed after all doors locked and electrical key transmitter sub-assembly unlock switch not pressed 11 to 14 V
      Ignition switch off, all doors closed, 10 seconds elapsed after all doors locked and electrical key transmitter sub-assembly unlock switch pressed Pulse generation
      G27-10 (SSW1) - Body ground*10 P - Body ground Intrusion sensor cancel switch signal Intrusion sensor cancel switch on Below 1 V
      Intrusion sensor cancel switch off Pulse generation
      G28-12 (ISIF) - Body ground*10 L - Body ground Intrusion sensor (theft warning ultrasonic sensor) signal input No moving object detected by sensor during arming preparation state or armed state 11 to 14 V
      Moving object detected by sensor during arming preparation state or armed state Pulse generation

      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

      • *3: for RHD and for 1GD-FTV, 2GD-FTV

      • *4: except *3

      • *5: w/ Security Horn Assembly

      • *6: w/ Theft Warning Siren Assembly

      • *7: w/ Door Control Battery

      • *8: w/o Door Control Battery

      • *9: w/ Double Locking

      • *10: w/ Intrusion Sensor

  2. COMBINATION METER ASSEMBLY

    B0027UAN02

    1. Measure the voltage, resistance and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G9-19 (+S) - Body ground V - Body ground Speed signal for other system (Output) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform)
      G10-12 (DOOR) - Body ground Y - Body ground Door courtesy switch signal except driver door All doors closed except driver door 11 to 14 V
      Any door open except driver door Below 1 V
      G10-15 (DCTY) - Body ground B - Body ground Driver side door condition signal Driver side door closed 11 to 14 V
      Driver side door open Below 1 V
      G10-16 (PCTY) - Body ground G - Body ground Front passenger side door condition signal Front passenger side door closed 11 to 14 V
      Front passenger side door open Below 1 V
      G10-17 (RLCY) - Body ground* V - Body ground Rear door LH condition signal Rear door LH closed 11 to 14 V
      Rear door LH open Below 1 V
      G10-18 (RRCY) - Body ground* L - Body ground Rear door RH condition signal Rear door RH closed 11 to 14 V
      Rear door RH open Below 1 V
      G10-20 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G9-21 (B) - Body ground W - Body ground Battery Always 11 to 14 V

      • *: for Double Cab


      1. B0024ZJN05

        Using an oscilloscope, check waveform.

        Waveform (Reference)
        Item Condition
        Tester Connection G9-19 (+S) - Body ground
        Tool setting 5 V/DIV, 20 ms./DIV
        Vehicle condition Driving at approximately 20 km/h (12 mph)

        Tech Tips

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.