AUTOMATIC TRANSMISSION SYSTEM (for 3UR-FE) TERMINALS OF ECM


  1. CHECK ECM

    A0156RWE10

    Tech Tips

    Each ECM terminal's 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
    A38-21 (L4) - C45-81 (E1) BR-R - W-B 4L position signal

    • Engine switch on (IG)

    • Transfer in 4L

    		 Below 1.5 V

    • Engine switch on (IG)

    • Transfer not in 4L

    		 11 to 14 V
    A38-5 (TFN) - C45-81 (E1) G - W-B N shift position switch signal

    • Engine switch on (IG)

    • Transfer in neutral

    		 Below 1.5 V

    • Engine switch on (IG)

    • Transfer not in neutral

    		 11 to 14 V
    C45-120 (NSW) - C45-81 (E1) L - W-B PNP switch signal

    • Engine switch on (IG)

    • Shift lever in P or N

    		 Below 1 V

    • Engine switch on (IG)

    • Shift lever not in P or N

    		 11 to 14 V
    C45-2 (P) - C45-81 (E1) G-B - W-B P shift position switch signal

    • Engine switch on (IG)

    • Shift lever in P

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever not in P

    		 Below 1 V
    C45-26 (R) - C45-81 (E1) L-R - W-B R shift position switch signal

    • Engine switch on (IG)

    • Shift lever in R

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever not in R

    		 Below 1 V
    C45-25 (N) - C45-81 (E1) G-W - W-B N shift position switch signal

    • Engine switch on (IG)

    • Shift lever in N

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever not in N

    		 Below 1 V
    C45-27 (D) - C45-81 (E1) G - W-B D shift position switch signal

    • Engine switch on (IG)

    • Shift lever in D

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever not in D

    		 Below 1 V
    A38-25 (S) - C45-81 (E1) W - W-B S shift position switch signal

    • Engine switch on (IG)

    • Shift lever in S

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever not in S

    		 Below 1 V
    A38-38 (SFTU) - C45-81 (E1) V - W-B Up-shift shift position switch signal

    • Engine switch on (IG)

    • Shift lever in S

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever in "+" position (up-shift)

    		 Below 1 V
    A38-27 (SFTD) - C45-81 (E1) L - W-B Down-shift position switch signal

    • Engine switch on (IG)

    • Shift lever in S

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever in "-" position (down-shift)

    		 Below 1 V
    C45-7 (S1) - C45-81 (E1) R - W-B S1 solenoid signal 1st gear Below 1 V
    Not on 1st gear 11 to 14 V
    C45-6 (S2) - C45-81 (E1) W - W-B S2 solenoid signal 1st, 2nd or 6th gear 11 to 14 V
    3rd, 4th or 5th gear Below 1 V
    C45-3 (S3) - C45-81 (E1) B-R - W-B S3 solenoid signal 1st, 2nd or 3rd gear 11 to 14 V
    4th, 5th or 6th gear Below 1 V
    C45-5 (S4) - C45-81 (E1) G-R - W-B S4 solenoid signal 5th or 6th gear 11 to 14 V
    1st, 2nd, 3rd or 4th gear Below 1 V
    C45-4 (SR) - C45-81 (E1) G - W-B SR solenoid signal 1st, 2nd, 3rd or 4th gear 11 to 14 V
    5th or 6th gear Below 1 V
    C45-14 (SL1+) - C45-15 (SL1-) Y - L SL1 solenoid signal 5th or 6th gear Pulse generation
    C45-12 (SL2+) - C45-13 (SL2-) G-R - L-W SL2 solenoid signal Engine is idling Pulse generation
    C45-9 (SLT+) - C45-8 (SLT-) B - G-B SLT solenoid signal Engine is idling Pulse generation
    C45-10 (SLU+) - C45-11 (SLU-) L-Y - L-R SLU solenoid signal 5th gear (lock-up) or 6th gear (lock-up) Pulse generation
    C45-122 (THO1) - C45-98 (ETHA) G-Y - BR No. 1 ATF temperature sensor signal No. 1 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C45-99 (THO2) - C45-98 (ETHA) L - BR No. 2 ATF temperature sensor signal No. 2 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C45-101 (SP2+) - C45-100 (SP2-) Y - B Speed sensor SP2 signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (see waveform 1)
    C45-124 (NT+) - C45-123 (NT-) Y - B Speed sensor NT signal

    Engine is idling

    (shift lever in P or N)

    Pulse generation

    (see waveform 2)
    A38-10 (CANH) - C45-81 (E1) P - W-B CAN communication line Engine switch on (IG)

    Pulse generation

    (see waveform 3)
    A38-11 (CANL) - C45-81 (E1) B - W-B CAN communication line Engine switch on (IG)

    Pulse generation

    (see waveform 4)
    A38-51 (PWR) - C45-81 (E1) L-B - W-B Pattern select (PWR) switch signal

    • Engine switch on (IG)

    • Pattern select (PWR) switch off

    		 11 to 14 V

    • Engine switch on (IG)

    • Pattern select (PWR) switch on

    		 Below 1.5 V
    A38-4 (SNWI) - C45-81 (E1) P-L - W-B Pattern select (2nd) switch signal

    • Engine switch on (IG)

    • Pattern select (2nd) switch off

    		 11 to 14 V

    • Engine switch on (IG)

    • Pattern select (2nd) switch continuously pressed

    		 Below 1.5 V

    1. A015BSYE04

      Using an oscilloscope, check waveform 1.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      C45-101 (SP2+) - C45-100 (SP2-) 2 V/DIV., 20 msec./DIV. Vehicle speed 20 km/h (12 mph)
    2. A0158I4E03

      Using an oscilloscope, check waveform 2.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      C45-124 (NT+) - C45-123 (NT-) 1 V/DIV., 2 msec./DIV. Engine is idling (Shift lever in P or N)
    3. A015BZTE03

      Using an oscilloscope, check waveform 3.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      A38-10 (CANH) - C45-81 (E1) 1 V/DIV., 10 μsec./DIV. Engine switch on (IG)
    4. A0155NUE03

      Using an oscilloscope, check waveform 4.

      Reference
      Terminal No. (Symbol) Tool Setting Condition
      A38-11 (CANL) - C45-81 (E1) 1 V/DIV., 10 μsec./DIV. Engine switch on (IG)