AUTOMATIC TRANSMISSION SYSTEM (for 1UR-FE) TERMINALS OF ECM


  1. CHECK ECM

    A01EO9JE11

    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
    A53-21 (L4) - C54-81 (E1) BR-R - BR Transfer L4 position signal

    • Engine switch on (IG)

    • Transfer position switch on L4

    		 Below 1.5 V

    • Engine switch on (IG)

    • Transfer position switch not on L4

    		 11 to 14 V
    A53-5 (TFN) - C54-81 (E1) G - BR N shift position switch signal

    • Engine switch on (IG)

    • Transfer not in neutral

    		 Below 1.5 V

    • Engine switch on (IG)

    • Transfer in neutral

    		 11 to 14 V
    C54-120 (NSW) - C54-81 (E1) L - BR 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
    C54-2 (P) - C54-81 (E1) G-B - BR 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
    C54-26 (R) - C54-81 (E1) L-R - BR 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
    C54-25 (N) - C54-81 (E1) G-W - BR 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
    C54-27 (D) - C54-81 (E1) G - BR 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
    A53-25 (S) - C54-81 (E1) W - BR 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
    A53-38 (SFTU) - C54-81 (E1) Y - BR 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 "+" (up-shift) or "+" shift paddle operated and held (up-shift)

    		 Below 1 V
    A53-27 (SFTD) - C54-81 (E1) L - BR Down-shift position switch signal

    • Engine switch on (IG)

    • Shift lever in S

    		 11 to 14 V

    • Engine switch on (IG)

    • Shift lever in "-" (down-shift) or "-" shift paddle operated and held (down-shift)

    		 Below 1 V
    A53-36 (STP) - C54-81 (E1) R - BR Stop light switch signal Brake pedal depressed 11 to 14 V
    Brake pedal released Below 1.5 V
    C54-7 (S1) - C54-81 (E1) R - BR Shift solenoid valve S1 signal 1st gear Below 1 V
    Not in 1st gear 11 to 14 V
    C54-6 (S2) - C54-81 (E1) W - BR Shift solenoid valve S2 signal 1st, 2nd or 6th gear 11 to 14 V
    3rd, 4th or 5th gear Below 1 V
    C54-3 (S3) - C54-81 (E1) B-R - BR Shift solenoid valve S3 signal 1st, 2nd or 3rd gear 11 to 14 V
    4th, 5th or 6th gear Below 1 V
    C54-5 (S4) - C54-81 (E1) G-R - BR Shift solenoid valve S4 signal 5th or 6th gear 11 to 14 V
    1st, 2nd, 3rd or 4th gear Below 1 V
    C54-4 (SR) - C54-81 (E1) G - BR Shift solenoid valve SR signal 1st, 2nd, 3rd or 4th gear 11 to 14 V
    5th or 6th gear Below 1 V
    C54-14 (SL1+) - C54-15 (SL1-) Y - L Shift solenoid valve SL1 signal 5th or 6th gear Pulse generation
    C54-12 (SL2+) - C54-13 (SL2-) G-R - L-W Shift solenoid valve SL2 signal Engine idling Pulse generation
    C54-9 (SLT+) - C54-8 (SLT-) B - G-B Shift solenoid valve SLT signal Engine idling Pulse generation
    C54-10 (SLU+) - C54-11 (SLU-) L-Y - L-R Shift solenoid valve SLU signal 5th (lock-up) gear or 6th (lock-up) gear Pulse generation
    C54-122 (THO1) - C54-98 (E2) G-Y - BR No. 1 ATF temperature sensor signal No. 1 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C54-99 (THO2) - C54-98 (E2) L - BR No. 2 ATF temperature sensor signal No. 2 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C54-101 (SP2+) - C54-100 (SP2-) Y - B Speed sensor SP2 signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (see waveform 1)
    C54-124 (NT+) - C54-123 (NT-) Y - B Speed sensor NT signal

    Engine idling

    (shift lever in P or N)

    Pulse generation

    (see waveform 2)
    A53-10 (CANH) - C54-81 (E1) P - BR CAN communication line Engine switch on (IG)

    Pulse generation

    (see waveform 3)
    A53-11 (CANL) - C54-81 (E1) B - BR CAN communication line Engine switch on (IG)

    Pulse generation

    (see waveform 4)
    A53-51 (PWR) - C54-81 (E1) L-B - BR 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
    A53-4 (SNWI) - C54-81 (E1) P - BR 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. A01ESAUE01

      Using an oscilloscope, check waveform 1.

      Reference:
      Terminal No. (Symbol) Tool Setting Condition
      C54-101 (SP2+) - C54-100 (SP2-) 2 V/DIV., 2 msec./DIV. Vehicle speed 20 km/h (12 mph)
    2. A01EMTHE01

      Using an oscilloscope, check waveform 2.

      Reference:
      Terminal No. (Symbol) Tool Setting Condition
      C54-124 (NT+) - C54-123 (NT-) 1 V/DIV., 2 msec./DIV. Engine idling (shift lever in P or N)
    3. A01ER8CE01

      Using an oscilloscope, check waveform 3.

      Reference:
      Terminal No. (Symbol) Tool Setting Condition
      A53-10 (CANH) - C54-81 (E1) 1 V/DIV., 10 μsec./DIV. Engine switch on (IG)
    4. A01EQ05E01

      Using an oscilloscope, check waveform 4.

      Reference:
      Terminal No. (Symbol) Tool Setting Condition
      A53-11 (CANL) - C54-81 (E1) 1 V/DIV., 10 μsec./DIV. Engine switch on (IG)