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Home >> Subaru >> 2019 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle (Diagnostics) >> Automatic Transmission System >> ECM Terminal Arrangement

ECM Terminal Arrangement

  1. Transmission control computer
    G12587370Courtesy of SUBARU OF AMERICA, INC.
    NOTE: Check the voltage and continuity between terminals.
    Terminal No. (Terminal symbol) Input/output Item Measuring condition Criteria
    A18-34 (IG1) ←→A18-33 (E01) Input Voltage IG ON 11 to 14V
    A18-35 (IG2) ←→A18-33 (E01) Input Voltage IG ON 11 to 14V
    A18-26 (BM) ←→A18-33 (E01) Input Voltage Always 11 to 14V
    A19-18 (SP2+) ←→A19-7 (SP2-) Input Waveform When vehicle speed is approx. 20 km/h {12 MPH}. Waveform 1
    A19-17 (NT+) ←→A19-28 (NT-) Input Waveform When engine is idling (select lever in P or N position). Waveform 2
    A19-3 (P) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Select lever in P position
    		 11 to 14V
    Input Voltage
    • IG ON
    • Select lever in any other than P position
    		 Less than 1 V
    A19-10 (R) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Select lever in R position
    		 11 to 14V
    Input Voltage
    • IG ON
    • Select lever in any other than R position
    		 Less than 1 V
    A19-21 (N) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Select lever in N position
    		 11 to 14V
    Input Voltage
    • IG ON
    • Select lever in any other than N position
    		 Less than 1 V
    A19-9 (D) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Select lever in D position
    		 11 to 14V
    Input Voltage
    • IG ON
    • Select lever in any other than D position
    		 Less than 1 V
    A19-8 (M) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Manual mode switch ON
    		 11 to 14V
    Input Voltage
    • IG ON
    • Manual mode switch OFF
    		 Less than 1 V
    A19-2 (SFTU) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Shift manual mode switch ON →"+"
    		 Less than 1V
    A19-1 (SFTD) ←→A18-33 (E01) Input Voltage
    • IG ON
    • Shift manual mode switch ON →"-"
    		 Less than 1V
    A18-22 (OIL) ←→A18-23 (EOIL) Input Voltage Transmission oil temperature 115°C or more Less than 1 V
    A18-16 (SL1+) ←→A18-12 (SL1-) Output Waveform 5th or 6th gear Waveform 3
    A18-5 (SL2+) ←→A18-11 (SL2-) Output Waveform While engine idling Waveform 4
    A18-4 (SLT+) ←→A18-9 (SLT-) Output Waveform While engine idling Waveform 5
    A18-13 (SLU+) ←→A18-1 (SLU-) Output Waveform In M position 2nd to 6th gear (when lock-up is operating) Waveform 6
    A18-7 (S1) ←→A18-33 (E01) Output Voltage 1st gear Less than 1 V
    Output Voltage Any other than 1st gear 11 to 14V
    A18-17 (S2) ←→A18-33 (E01) Output Voltage 1st, 2nd or 6th gear 11 to 14V
    Output Voltage 3rd, 4th or 5th gear Less than 1 V
    A18-6 (S3) ←→A18-33 (E01) Output Voltage 1st, 2nd or 3rd gear 11 to 14V
    Output Voltage 4th, 5th or 6th gear Less than 1 V
    A18-14 (S4) ←→A18-33 (E01) Output Voltage 5th or 6th gear 11 to 14V
    Output Voltage 1st, 2nd, 3rd or 4th gear Less than 1 V
    A18-15 (SR) ←→A18-33 (E01) Output Voltage 1st, 2nd, 3rd or 4th gear 11 to 14V
    Output Voltage 5th or 6th gear Less than 1 V
    A18-29 (CANH) ←→A18-33 (E01) - Waveform
    • IG ON
    • Engine stop
    		 Waveform 7
    A18-28 (CANL) ←→A18-33 (E01) - Waveform
    • IG ON
    • Engine stop
    		 Waveform 8
    A18-33 (E01) ←→chassis ground - Resistance Always Less than 1 Ω
    A18-3 (E02) ←→chassis ground - Resistance Always Less than 1 Ω
    A19-13 (SPORT) ←→chassis ground Input Voltage
    • IG ON
    • Pattern select switch "SPORT" ON
    		 Less than 1 V
    Input Voltage
    • IG ON
    • Pattern select switch "SPORT" OFF
    		 11 to 14V
    A19-24 (SNOW) ←→chassis ground Input Voltage
    • IG ON
    • Pattern select switch "SNOW" ON
    		 Less than 1 V
    Input Voltage
    • IG ON
    • Pattern select switch "SNOW" OFF
    		 11 to 14V
    1. Waveform 1
      G12587371Courtesy of SUBARU OF AMERICA, INC.
      Item Contents
      Measuring terminal A19-18 (SP2+) ←→A19-7 (SP2-)
      Equipment setting 1 V/DIV, 2 ms/DIV
      Measuring condition When vehicle speed is approx. 20 km/h {12 MPH}.
      G12587372Courtesy of SUBARU OF AMERICA, INC.
    2. Waveform 2
      Item Contents
      Measuring terminal A19-17 (NT+) ←→A19-28 (NT-)
      Equipment setting 5V/DIV., 2msec./DIV.
      Measuring condition When engine is idling (select lever in P or N position).
      G12587373Courtesy of SUBARU OF AMERICA, INC.
    3. Waveform 3
      Item Contents
      Measuring terminal A18-16 (SL1+) ←→A18-12 (SL1-)
      Equipment setting 5V/DIV, 1 ms/DIV
      Measuring condition 5th or 6th gear
      G12587374Courtesy of SUBARU OF AMERICA, INC.
    4. Waveform 4
      Item Contents
      Measuring terminal A18-5 (SL2+) ←→A18-11 (SL2-)
      Equipment setting 5V/DIV., 1msec./DIV.
      Measuring condition While engine running
      G12587375Courtesy of SUBARU OF AMERICA, INC.
    5. Waveform 5
      Item Contents
      Measuring terminal A18-4 (SLT+) ←→A18-9 (SLT-)
      Equipment setting 5V/DIV., 1msec./DIV.
      Measuring condition While engine idling
      G12587376Courtesy of SUBARU OF AMERICA, INC.
    6. Waveform 6
      Item Contents
      Measuring terminal A18-13 (SLU+) ←→A18-1 (SLU-)
      Equipment setting 5V/DIV., 1msec./DIV.
      Measuring condition M position: in 2nd to 6th gear (when lock-up is operating)
      G08552727Courtesy of SUBARU OF AMERICA, INC.
    7. Waveform 7
      Item Contents
      Measuring terminal A18-29 (CANH) ←→A18-33 (E01)
      Equipment setting 1V/DIV., 10msec/DIV.
      Measuring condition Engine stop, IG ON
      G08552728Courtesy of SUBARU OF AMERICA, INC.
    8. Waveform 8
      Item Contents
      Measuring terminal A18-28 (CANL) ←→A18-33 (E01)
      Equipment setting 1V/DIV., 10msec/DIV.
      Measuring condition Engine stop, IG ON
  2. Instrument panel junction block ASSY, main body ECM (multiplex network body computer)
    G12587379Courtesy of SUBARU OF AMERICA, INC.
    NOTE: Measure the voltage between the terminals.
    Terminal No. (Terminal symbol) Input/output Item Measuring condition Criteria
    D5-20 ←→chassis ground Output Voltage
    • IG ON
    • Select lever in P position
    • Stop light switch ON (brake pedal depressed)
    		 11 to 14V
    • IG ON
    • Select lever in P position
    • Stop light switch OFF (brake pedal not depressed)
    		 Less than 1 V
    3C-8 ←→chassis ground Input Voltage Stop light switch ON (brake pedal depressed) 11 to 14V
    Stop light switch OFF (brake pedal not depressed) Less than 1 V
    3D-23 ←→chassis ground Input Voltage Select lever in any other than P position 11 to 14V
    Select lever in P position Less than 1 V
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