AUTOMATIC TRANSMISSION SYSTEM TERMINALS OF ECM


  1. ECM

    A01MVJXE02

    Tech Tips

    The standard voltage and resistance of each ECM terminal is shown in the table below.

    In the table, first follow the information under "Condition". Look under "Terminal No. (Symbols)" for the terminals to inspected. The standard voltage or resistance between the terminals is shown under "Specific Condition".

    Use the illustration above as a reference for the ECM terminals.

    Terminals No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    A76-7 (BATT) - F4-1 (E1) L - BR Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
    A76-9 (S3) - F4-1 (E1) G - BR S3 solenoid signal 1st, 2nd or 3rd gear 11 to 14 V
    4th, 5th or 6th gear Below 1 V
    A76-13 (STP) - F4-1 (E1) R - BR Stop light switch signal Brake pedal is depressed 7.5 to 14 V
    Brake pedal is released Below 1 V
    A76-14 (KD) - F4-1 (E1) B - BR Kick-down switch signal Engine switch on (IG) and accelerator pedal depressed Below 1 V
    A77-2 (+B) - F4-1 (E1) B-R - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A77-6 (SR) - F4-1 (E1) R - BR SR solenoid signal 1st, 2nd, 3rd or 4th gear 11 to 14 V
    5th or 6th gear Below 1 V
    A77-7 (SFTD) - F4-1 (E1) P - BR Down shift switch signal Engine switch on (IG) and shift lever M position 11 to 14 V
    Engine switch on (IG) and shift lever "-" position (Down shift) Below 1 V
    Engine switch on (IG) and "-" shift paddle operated and held (down-shift) Below 1 V
    A77-8 (SFTU) - F4-1 (E1) V - BR Up shift switch signal Engine switch on (IG) and shift lever M position 11 to 14 V
    Engine switch on (IG) and shift lever "+" position (Up shift) Below 1 V
    Engine switch on (IG) and "+" shift paddle operated and held (up-shift) Below 1 V
    A77-13 (CANL) - F4-1 (E1) B - BR CAN communication line Engine switch on (IG)

    Pulse generation

    (See waveform 1)
    A77-14 (CANH) - F4-1 (E1) R - BR CAN communication line Engine switch on (IG)

    Pulse generation

    (See waveform 2)
    A77-16 (S) - F4-1 (E1) GR - BR M shift position switch signal Engine switch on (IG) and shift lever M position 11 to 14 V
    Engine switch on (IG) and shift lever except M position Below 1 V
    A77-20 (STA) - F4-1 (E1) R - BR Starter signal Cranking 11 to 14 V
    A77-29 (NSW) - F4-1 (E1) L - BR Park neutral switch signal Engine switch on (IG) and shift lever P and N position Below 1 V
    Engine switch on (IG) and shift lever except P and N position 11 to 14 V
    A77-33 (SP2+) - A77-32 (SP2-) L - Y Transmission revolution sensor (SP2) signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (See waveform 3)
    F1-1 (+BM) - F4-1 (E1) P - BR Power source of throttle motor Power source of throttle motor 11 to 14 V
    F1-3 (SL1+) - F1-2 (SL1-) Y - GR SL1 solenoid signal 5th or 6th gear Pulse generation
    F1-4 (S2) - F4-1 (E1) W - BR S2 solenoid signal 1st, 2nd or 6th gear 11 to 14 V
    3rd, 4th or 5th gear Below 1 V
    F1-5 (S1) - F4-1 (E1) R - BR S1 solenoid signal 1st gear Below 1 V
    Except 1st gear 11 to 14 V
    F1-14 (SL2+) - F1-13 (SL2-) B - G SL2 solenoid signal Engine idle speed Pulse generation
    F1-29 (THO1) - F1-28 (E2) L - BR ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V
    F3-3 (SLU+) - F3-2 (SLU-) R - L SLU solenoid signal 5th (lock-up) or 6th (lock-up) gear Pulse generation
    F3-5 (SLT+) - F3-4 (SLT-) G - BR SLT solenoid signal Engine idle speed Pulse generation
    F4-11 (R) - F4-1 (E1) R - BR R shift position switch signal Engine switch on (IG) and shift lever R position 11 to 14 V
    Engine switch on (IG) and shift lever except R position Below 1 V
    F4-12 (P) - F4-1 (E1) B - BR Park position switch signal Engine switch on (IG) and shift lever P position 11 to 14 V
    Engine switch on (IG) and shift lever except P position Below 1 V
    F4-13 (N) - F4-1 (E1) G - BR Neutral position switch signal Engine switch on (IG) and shift lever N position 11 to 14 V
    Engine switch on (IG) and shift lever except N position Below 1 V
    F4-14 (D) - F4-1 (E1) W - BR D shift position switch signal Engine switch on (IG) and shift lever D and M position 11 to 14 V
    Engine switch on (IG) and shift lever except D and M position Below 1 V
    F4-16 (NT+) - F4-15 (NT-) R - G Transmission revolution sensor (NT) signal Engine idle speed (P or N position)

    Pulse generation

    (See waveform 4)
    F4-21 (S4) - F4-1 (E1) L - BR S4 solenoid signal 5th or 6th gear 11 to 14 V
    1st, 2nd, 3rd or 4th gear Below 1 V

    1. A01MVEEE04
      *a 1 V/DIV.
      *b 10 μsec./DIV.

      Waveform 1

      Reference:
      Terminal CANL - E1
      Tool setting 1 V/DIV., 10 μsec./DIV.
      Vehicle condition Engine switch on (IG)
    2. A01MVLKE04
      *a 1 V/DIV.
      *b 10 μsec./DIV.

      Waveform 2

      Reference:
      Terminal CANH - E1
      Tool setting 1 V/DIV., 10 μsec./DIV.
      Vehicle condition Engine switch on (IG)
    3. A01MWN7E01
      *a 2 V/DIV.
      *b 20 ms./DIV.

      Waveform 3

      Reference:
      Terminal SP2+ - SP2-
      Tool setting 2 V/DIV., 20 ms./DIV.
      Vehicle condition Vehicle speed 20 km/h (12 mph)
    4. A01MVOAE01
      *a 1 V/DIV.
      *b 2 ms./DIV.

      Waveform 4

      Reference:
      Terminal NT+ - NT-
      Tool setting 1 V/DIV., 2 ms./DIV.
      Vehicle condition Engine idle speed (P or N position)