AUTOMATIC TRANSMISSION SYSTEM TERMINALS OF ECU


  1. TCM

    A01FJ3HE06

    Tech Tips

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

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

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

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A74-1 (E01) - Body ground W-B - Body ground Ground Always Below 1 Ω
    A74-2 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω
    A74-3 (P) - A74-2 (E1) W - W-B Park position switch signal Engine switch on (IG) and shift lever in P 11 to 14 V
    Engine switch on (IG) and shift lever not in P Below 1 V
    A74-5 (+B) - A74-2 (E1) L - W-B Power source of TCM Engine switch on (IG) 11 to 14 V
    A74-6 (BATT) - A74-2 (E1) L - W-B Battery (for measuring battery voltage and for TCM memory) Always 11 to 14 V
    A74-10 (N) - A74-2 (E1) LG - W-B N shift position switch signal Engine switch on (IG) and shift lever in N 11 to 14 V
    Engine switch on (IG) and shift lever not in N Below 1 V
    A74-11 (R) - A74-2 (E1) R - W-B R shift position switch signal Engine switch on (IG) and shift lever in R 11 to 14 V
    Engine switch on (IG) and shift lever not in R Below 1 V
    A74-13 (CAN-) - A74-2 (E1) L - W-B CAN communication line Engine switch on (IG)

    Pulse generation

    (see waveform 5)
    A74-15 (STA) - A74-2 (E1) B - W-B Starter signal Cranking (shift lever in P or N, engine switch start) 11 to 14 V
    Engine switch on (IG) and shift lever P or N Below 2 V
    A74-16 (IG2) - A74-2 (E1) G - W-B Engine switch Engine switch on (IG) 11 to 14 V
    A74-20 (D) - A74-2 (E1) P - W-B D shift position switch signal Engine switch on (IG) and shift lever in D or M 11 to 14 V
    Engine switch on (IG) and shift lever not in D or M Below 1 V
    A74-21 (CAN+) - A74-2 (E1) R - W-B CAN communication line Engine switch on (IG)

    Pulse generation

    (see waveform 4)
    A74-23 (STP) - A74-2 (E1) R - W-B Stop light switch signal Brake pedal depressed 7.5 to 14 V
    Brake pedal released Below 1 V
    A74-24 (EC) - Body ground W-B - Body ground Ground Always Below 1 Ω
    F72-12 (THO1) - F72-13 (E2) B - Y ATF temperature sensor signal ATF temperature 115°C (239°F) or more Below 1.5 V
    F72-6 (SL1+) - F72-5 (SL1-) L - R Shift solenoid valve SL1 signal 1st, 2nd, 3rd, 4th or 5th gear Pulse generation
    F72-4 (SL2+) - F72-14 (SL2-) L - GR Shift solenoid valve SL2 signal 5th, 6th, 7th or 8th gear Pulse generation
    F72-26 (SL3+) - F72-25 (SL3-) P - B Shift solenoid valve SL3 signal 3rd or 7th gear Pulse generation
    F72-17 (SL4+) - F72-16 (SL4-) W - Y Shift solenoid valve SL4 signal 4th or 6th gear Pulse generation
    F72-3 (SL5+) - F72-10 (SL5-) R - GR Shift solenoid valve SL5 signal 2nd or 8th gear Pulse generation
    F72-1 (SLT+) - F72-7 (SLT-) GR - P Shift solenoid valve SLT signal Engine idling Pulse generation
    F72-2 (SLU+) - F72-8 (SLU-) B - GR Shift solenoid valve SLU signal

    D position:

    4th, 5th, 6th, 7th or 8th gear

    (Flex lock-up ON and lock-up ON)

    M position:

    2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear

    (Lock-up ON)

    		 Pulse generation
    F72-24 (SL) - A74-2 (E1) G - W-B Shift solenoid valve SL signal

    D position:

    4th, 5th, 6th, 7th or 8th gear

    (Flex lock-up ON and lock-up ON)

    M position:

    2nd, 3rd, 4th, 5th, 6th, 7th or 8th gear

    (Lock-up ON)

    		 11 to 14 V
    F72-15 (SR) - A74-2 (E1) P - W-B Shift solenoid valve SR signal All gears 11 to 14 V
    F72-21 (NTB) - A74-2 (E1) Y - W-B Power source for sensor (specific voltage) Engine switch on (IG) 11 to 14 V
    F72-20 (NTO) - A74-2 (E1) L - W-B Transmission Revolution Sensor (NT) signal Engine idling (shift lever in P or N)

    Pulse generation

    (see waveform 1)
    F72-19 (NC3B) - A74-2 (E1) R - W-B Power source for sensor (specific voltage) Engine switch on (IG) 11 to 14 V
    F72-18 (NC3O) - A74-2 (E1) G - W-B Transmission Revolution Sensor (NC3) signal 1st, 3rd, 4th, 5th, 6th or 7th gear

    Pulse generation

    (see waveform 2)
    F72-23 (SP2B) - A74-2 (E1) B - W-B Power source for sensor (specific voltage) Engine switch on (IG) 11 to 14 V
    F72-22 (SP2O) - A74-2 (E1) R - W-B Transmission Revolution Sensor (SP2) signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (see waveform 3)
    F72-9 (TPS1) - A74-2 (E1) V - W-B Oil pressure switch signal 6th to 8th gear 11 to 14 V
    1st to 5th gear Below 1 V

    1. A01FGQLE01

      Using an oscilloscope, check waveform 1.

      Reference
      Item Content
      Terminal No. (Symbol) F72-20 (NTO) - A74-2 (E1)
      Tool setting 1 V/DIV., 2 msec./DIV.
      Condition Engine idling (shift lever in P or N)
    2. A01FGQLE01

      Using an oscilloscope, check waveform 2.

      Reference
      Item Content
      Terminal No. (Symbol) F72-18 (NC3O) - A74-2 (E1)
      Tool setting 1 V/DIV., 2 msec./DIV.
      Condition 1st, 3rd, 4th, 5th, 6th or 7th gear
    3. A01FGQLE01

      Using an oscilloscope, check waveform 3.

      Reference
      Item Content
      Terminal No. (Symbol) F72-22 (SP2O) - A74-2 (E1)
      Tool setting 1 V/DIV., 2 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)
    4. A01FIH4E09

      Using an oscilloscope, check waveform 4.

      Reference
      Item Content
      Terminal No. (Symbol) A74-21 (CAN+) - A74-2 (E1)
      Tool setting 1 V/DIV., 10 msec./DIV.
      Condition Engine switch on (IG)
    5. A01FHUTE09

      Using an oscilloscope, check waveform 5.

      Reference
      Item Content
      Terminal No. (Symbol) A74-13 (CAN-) - A74-2 (E1)
      Tool setting 1 V/DIV., 10 msec./DIV.
      Condition Engine switch on (IG)

  2. ECM

    A01FG6OE01

    Tech Tips

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

    In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition".

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

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A21-1 (+B2) - F4-1 (E1) P - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A21-2 (+B) - F4-1 (E1) P - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A21-7 (SFTD) - F4-1 (E1) W - BR Down-shift position switch signal Engine switch on (IG) 11 to 14 V

    • Engine switch on (IG) and shift lever held in "-"

    • Engine switch on (IG) and "-" paddle switch pulled

    		 Below 1 V
    A21-8 (SFTU) - F4-1 (E1) Y - BR Up-shift shift position switch signal Engine switch on (IG) 11 to 14 V

    • Engine switch on (IG) and shift lever held in "+"

    • Engine switch on (IG) and "+" paddle switch pulled

    		 Below 1 V
    A21-16 (S) - F4-1 (E1) R - BR M shift position switch signal Engine switch on (IG) and shift lever in M 11 to 14 V
    Engine switch on (IG) and shift lever not in M Below 1 V
    A21-23 (PWR)*1 - F4-1 (E1) P - BR Combination switch signal Engine switch on (IG) and combination switch not turned 11 to 14 V
    Engine switch on (IG) and combination switch being turned and held at SPORT position Below 1 V
    A21-25 (SPCN) - F4-1 (E1) Y - BR Combination switch signal Engine switch on (IG) and combination switch not pushed 11 to 14 V
    Engine switch on (IG) and combination switch being pushed and held at NORMAL position Below 1 V
    A19-14 (KD) - F4-1 (E1) L - BR Kick-down switch signal Engine switch on (IG) and accelerator pedal depressed Below 1 V
    Engine switch on (IG) and accelerator pedal released 11 to 14 V
    A19-16 (SPSW)*2 - F4-1 (E1) P - BR Combination switch signal Engine switch on (IG) and combination switch not turned 11 to 14 V
    Engine switch on (IG) and combination switch being turned and held at SPORT position Below 1 V

    • *1: w/o Adaptive Variable Suspension

    • *2: w/ Adaptive Variable Suspension