AUTOMATIC TRANSAXLE SYSTEM TERMINALS OF ECM


  1. CHECK ECM

    A0055M2E02

    Tech Tips

    Each ECM terminal standard voltage 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
    A40-25 (NSW) - B39-105 (E1) G - BR PNP switch signal

    • Ignition switch ON

    • Shift lever in P or N

    		 Below 1 V
    A40-25 (NSW) - B39-105 (E1) G - BR PNP switch signal

    • Ignition switch ON

    • Shift lever not in P or N

    		 11 to 14 V
    B39-77 (P) - B39-105 (E1) V - BR P shift position switch signal

    • Ignition switch ON

    • Shift lever in P

    		 11 to 14 V
    B39-77 (P) - B39-105 (E1) V - BR P shift position switch signal

    • Ignition switch ON

    • Shift lever not in P

    		 Below 1 V
    B39-76 (R) - B39-105 (E1) R - BR R shift position switch signal

    • Ignition switch ON

    • Shift lever in R

    		 11 to 14 V
    B39-76 (R) - B39-105 (E1) R - BR R shift position switch signal

    • Ignition switch ON

    • Shift lever not in R

    		 Below 1 V
    B39-99 (N) - B39-105 (E1) B - BR N shift position switch signal

    • Ignition switch ON

    • Shift lever in N

    		 11 to 14 V
    B39-99 (N) - B39-105 (E1) B - BR N shift position switch signal

    • Ignition switch ON

    • Shift lever not in N

    		 Below 1 V
    A40-47 (D) - B39-105 (E1) W - BR D shift position switch signal

    • Ignition switch ON

    • Shift lever in D

    		 11 to 14 V
    A40-47 (D) - B39-105 (E1) W - BR D shift position switch signal

    • Ignition switch ON

    • Shift lever not in D

    		 Below 1 V
    B39-39 (S) - B39-105 (E1) GR - BR S shift position switch signal

    • Ignition switch ON

    • Shift lever in S

    		 11 to 14 V
    B39-39 (S) - B39-105 (E1) GR - BR S shift position switch signal

    • Ignition switch ON

    • Shift lever not in S

    		 Below 1 V
    A40-16 (SFTU) - B39-105 (E1) W - BR Up-shift position switch signal

    • Ignition switch ON

    • Shift lever in S

    		 11 to 14 V
    A40-16 (SFTU) - B39-105 (E1) W - BR Up-shift position switch signal

    • Ignition switch ON

    • Shift lever in "+" (up-shift)

    		 Below 1 V
    A40-51 (SFTD) - B39-105 (E1) R - BR Down-shift position switch signal

    • Ignition switch ON

    • Shift lever in S

    		 11 to 14 V
    A40-51 (SFTD) - B39-105 (E1) R - BR Down-shift position switch signal

    • Ignition switch ON

    • Shift lever in "-" (down-shift)

    		 Below 1 V
    B39-61 (SL1+) - B39-60 (SL1-) P - L SL1 solenoid signal Engine idling

    Pulse generation

    (see waveform 1)
    B39-61 (SL1+) - B39-60 (SL1-) P - L SL1 solenoid signal Ignition switch ON 11 to 14 V
    B39-61 (SL1+) - B39-60 (SL1-) P - L SL1 solenoid signal In 1st gear 11 to 14 V
    B39-61 (SL1+) - B39-60 (SL1-) P - L SL1 solenoid signal Not in 1st gear Below 1 V
    B39-58 (SL2+) - B39-57 (SL2-) G - GR SL2 solenoid signal Engine idling

    Pulse generation

    (see waveform 2)
    B39-58 (SL2+) - B39-57 (SL2-) G - GR SL2 solenoid signal Ignition switch ON Below 1 V
    B39-58 (SL2+) - B39-57 (SL2-) G - GR SL2 solenoid signal In 1st or 2nd gear 11 to 14 V
    B39-58 (SL2+) - B39-57 (SL2-) G - GR SL2 solenoid signal In 3rd or 4th gear Below 1 V
    B39-56 (DSL) - B39-46 (E01) W - BR DSL solenoid signal Vehicle speed 65 km/h (40 mph), lock-up ON to OFF

    Pulse generation

    (see waveform 3)
    B39-54 (SLT+) - B39-53 (SLT-) LG - B SLT solenoid signal Engine idling

    Pulse generation

    (see waveform 4)
    B39-55 (S4) - B39-46 (E01) SB - BR S4 solenoid signal Ignition switch ON Below 1 V
    B39-55 (S4) - B39-46 (E01) SB - BR S4 solenoid signal In 4th gear 11 to 14 V
    B39-55 (S4) - B39-46 (E01) SB - BR S4 solenoid signal Not in 4th gear Below 1 V
    B39-70 (THO1) - B39-71 (ETHO) Y - R ATF temperature sensor signal ATF temperature 115°C (239°F) or higher Below 1.5 V
    B39-124 (NT+) - B39-123 (NT-) B - Y Speed sensor (NT) signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (see waveform 5)
    B39-122 (NC+) - B39-100 (NC-) G - P Speed sensor (NC) signal

    • Vehicle speed 30 km/h (19 mph) (3rd gear)

    • Engine speed 1400 rpm

    Pulse generation

    (see waveform 6)

    1. A0052ZRE04
      *a 5 V/DIV.
      *b 1 msec./DIV.

      Using an oscilloscope, check waveform 1.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      B39-61 (SL1+) - B39-60 (SL1-) 5 V/DIV., 1 msec./DIV. Engine idling
    2. A0052ZRE04
      *a 5 V/DIV.
      *b 1 msec./DIV.

      Using an oscilloscope, check waveform 2.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      B39-58 (SL2+) - B39-57 (SL2-) 5 V/DIV., 1 msec./DIV. Engine idling
    3. A0058HGE04
      *1 10 V/DIV.
      *2 100 msec./DIV.

      Using an oscilloscope, check waveform 3.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      B39-56 (DSL) - B39-46 (E01) 10 V/DIV., 100 msec./DIV. Vehicle speed 65 km/h (40 mph), lock-up ON to OFF
    4. A0052ZRE04
      *a 5 V/DIV.
      *b 1 msec./DIV.

      Using an oscilloscope, check waveform 4.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      B39-54 (SLT+) - B39-53 (SLT-) 5 V/DIV., 1 msec./DIV. Engine idling
    5. A00550OE04
      *a 5 V/DIV.
      *b 0.5 msec./DIV.

      Using an oscilloscope, check waveform 5.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      B39-124 (NT+) - B39-123 (NT-) 5 V/DIV., 0.5 msec./DIV. Vehicle speed 20 km/h (12 mph)
    6. A0052U3E04
      *a 1 V/DIV.
      *b 1 msec./DIV.

      Using an oscilloscope, check waveform 6.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      B39-122 (NC+) - B39-100 (NC-) 1 V/DIV., 1 msec./DIV.

      • Vehicle speed 30 km/h (19 mph) (3rd gear)

      • Engine speed 1400 rpm