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Terminals Of ECM

  1. CHECK ECM 
    Fig 1: Identifying ECM Terminals
    G05628946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    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 (Fig 1) above as a reference for the ECM terminals.

    ECM CONNECTOR TERMINALS REFERENCE

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    A38-21 (L4) - C53-81 (E1) BR-R - W-B Transfer L4 position signal
    • Engine switch on (IG)
    • Transfer position switch on L4
    		 Below 1.5 V
    A38-21 (L4) - C53-81 (E1) BR-R - W-B Transfer L4 position signal
    • Engine switch on (IG)
    • Transfer position switch not on L4
    		 11 to 14 V
    A38-5 (TFN) - C53-81 (E1) G - W-B Transfer neutral position signal
    • Engine switch on (IG)
    • Transfer position in neutral
    		 Below 1.5 V
    A38-5 (TFN) - C53-81 (E1) G - W-B Transfer neutral position signal
    • Engine switch on (IG)
    • Transfer position not in neutral
    		 11 to 14 V
    C53-120 (NSW) - C53-81 (E1) L - W-B PNP switch signal
    • Engine switch on (IG)
    • Shift lever in P or N
    		 Below 1 V
    C53-120 (NSW) - C53-81 (E1) L - W-B PNP switch signal
    • Engine switch on (IG)
    • Shift lever not in P or N
    		 11 to 14 V
    C53-2 (P) - C53-81 (E1) G-B - W-B P shift position switch signal
    • Engine switch on (IG)
    • Shift lever in P
    		 11 to 14 V
    C53-2 (P) - C53-81 (E1) G-B - W-B P shift position switch signal
    • Engine switch on (IG)
    • Shift lever not in P
    		 Below 1 V
    C53-26 (R) - C53-81 (E1) L-R - W-B R shift position switch signal
    • Engine switch on (IG)
    • Shift lever in R
    		 11 to 14 V
    C53-26 (R) - C53-81 (E1) L-R - W-B R shift position switch signal
    • Engine switch on (IG)
    • Shift lever not in R
    		 Below 1 V
    C53-25 (N) - C53-81 (E1) G-W - W-B N shift position switch signal
    • Engine switch on (IG)
    • Shift lever in N
    		 11 to 14 V
    C53-25 (N) - C53-81 (E1) G-W - W-B N shift position switch signal
    • Engine switch on (IG)
    • Shift lever not in N
    		 Below 1 V
    C53-27 (D) - C53-81 (E1) G - W-B D shift position switch signal
    • Engine switch on (IG)
    • Shift lever in D
    		 11 to 14 V
    C53-27 (D) - C53-81 (E1) G - W-B D shift position switch signal
    • Engine switch on (IG)
    • Shift lever not in D
    		 Below 1 V
    A38-25 (S) - C53-81 (E1) W - W-B S shift position switch signal
    • Engine switch on (IG)
    • Shift lever in S
    		 11 to 14 V
    A38-25 (S) - C53-81 (E1) W - W-B S shift position switch signal
    • Engine switch on (IG)
    • Shift lever not in S
    		 Below 1 V
    A38-38 (SFTU) - C53-81 (E1) Y - W-B Up-shift shift position switch signal
    • Engine switch on (IG)
    • Shift lever in S
    		 11 to 14 V
    A38-38 (SFTU) - C53-81 (E1) Y - W-B Up-shift shift position switch signal
    • Engine switch on (IG)
    • Shift lever "+" position (up-shift)
    		 Below 1 V
    A38-27 (SFTD) - C53-81 (E1) L - W-B Down-shift position switch signal
    • Engine switch on (IG)
    • Shift lever in S
    		 11 to 14 V
    A38-27 (SFTD) - C53-81 (E1) L - W-B Down-shift position switch signal
    • Engine switch on (IG)
    • Shift lever"-" position (down-shift)
    		 Below 1 V
    A38-36 (STP) - C53-81 (E1) R - W-B Stop light switch signal Brake pedal depressed 11 to 14 V
    A38-36 (STP) - C53-81 (E1) R - W-B Stop light switch signal Brake pedal released Below 1.5 V
    C53-7 (S1) - C53-81 (E1) R - W-B Shift solenoid valve S1 signal 1st gear Below 1 V
    C53-7 (S1) - C53-81 (E1) R - W-B Shift solenoid valve S1 signal Not in 1st gear 11 to 14 V
    C53-6 (S2) - C53-81 (E1) W - W-B Shift solenoid valve S2 signal 1st, 2nd or 6th gear 11 to 14 V
    C53-6 (S2) - C53-81 (E1) W - W-B Shift solenoid valve S2 signal 3rd, 4th or 5th gear Below 1 V
    C53-3 (S3) - C53-81 (E1) B-R - W-B Shift solenoid valve S3 signal 1st, 2nd or 3rd gear 11 to 14 V
    C53-3 (S3) - C53-81 (E1) B-R - W-B Shift solenoid valve S3 signal 4th, 5th or 6th gear Below 1 V
    C53-5 (S4) - C53-81 (E1) G-R - W-B Shift solenoid valve S4 signal 5th or 6th gear 11 to 14 V
    C53-5 (S4) - C53-81 (E1) G-R - W-B Shift solenoid valve S4 signal 1st, 2nd, 3rd or 4th gear Below 1 V
    C53-4 (SR) - C53-81 (E1) G - W-B Shift solenoid valve SR signal 1st, 2nd, 3rd or 4th gear 11 to 14 V
    C53-4 (SR) - C53-81 (E1) G - W-B Shift solenoid valve SR signal 5th or 6th gear Below 1 V
    C53-14 (SL1+) - C53-15 (SL1-) Y - L Shift solenoid valve SL1 signal 5th or 6th gear Pulse generation (see  a waveform 1)
    C53-12 (SL2+) - C53-13 (SL2-) G-R - L-W Shift solenoid valve SL2 signal Engine idling Pulse generation (see  b waveform 2)
    C53-9 (SLT+) - C53-8 (SLT-) B - G-B Shift solenoid valve SLT signal Engine idling Pulse generation (see  c waveform 3)
    C53-10 (SLU+) - C53-11 (SLU-) L-Y - L-R Shift solenoid valve SLU signal 5th (lock-up) gear or 6th (lock-up) gear Pulse generation (see  d waveform 4)
    C53-122 (THO1) - C53-98 (ETHA) G-Y - BR No. 1 ATF temperature sensor signal No. 1 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C53-99 (THO2) - C53-98 (ETHA) L - BR No. 2 ATF temperature sensor signal No. 2 ATF temperature: 115°C (239°F) or higher Below 1.5 V
    C53-101 (SP2+) - C53-100 (SP2-) Y - B Speed sensor SP2 signal Vehicle speed 20 km/h (12 mph) Pulse generation (see  e waveform 5)
    C53-124 (NT+) - C53-123 (NT-) Y - B Speed sensor NT signal Engine idling (shift lever in P or N) Pulse generation (see  f waveform 6)
    A38-10 (CANH) - C53-81 (E1) P - W-B CAN communication line Engine switch on (IG) Pulse generation (see  g waveform 7)
    A38-11 (CANL) - C53-81 (E1) B - W-B CAN communication line Engine switch on (IG) Pulse generation (see  h waveform 8)
    A38-51 (PWR) - C53-81 (E1) L-B - W-B Pattern select (PWR) switch signal
    • Engine switch on (IG)
    • Pattern select (PWR) switch off
    		 11 to 14 V
    A38-51 (PWR) - C53-81 (E1) L-B - W-B Pattern select (PWR) switch signal
    • Engine switch on (IG)
    • Pattern select (PWR) switch on
    		 Below 1.5 V
    A38-4 (SNWI) - C53-81 (E1) R - W-B Pattern select (2ND) switch signal
    • Engine switch on (IG)
    • Pattern select (2ND) switch off
    		 11 to 14 V
    A38-4 (SNWI) - C53-81 (E1) R - W-B Pattern select (2ND) switch signal
    • Engine switch on (IG)
    • Pattern select (2ND) switch continuously pressed
    		 Below 1.5 V
    1. Using an oscilloscope, check waveform 1.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      C53-14 (SL1+) - C53-15 (SL1-) 5 V/DIV., 1 msec./DIV. Engine idling
      Fig 2: Identifying Oscilloscope Waveform 1
      G05628947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using an oscilloscope, check waveform 2.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      C53-12 (SL2+) - C53-13 (SL2-) 5 V/DIV., 1 msec./DIV. Engine idling
      Fig 3: Identifying Oscilloscope Waveform 2
      G05628948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check waveform 3.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      C53-9 (SLT+) - C53-8 (SLT-) 5 V/DIV., 1 msec./DIV. Engine idling
      Fig 4: Identifying Oscilloscope Waveform 3
      G05628949Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using an oscilloscope, check waveform 4.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      C53-10 (SLU+) - C53-11 (SLU-) 5 V/DIV., 1 msec./DIV. 5th (lock-up)
      Fig 5: Identifying Oscilloscope Waveform 4
      G05628950Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an oscilloscope, check waveform 5.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      C53-101 (SP2+) - C53-100 (SP2-) 2 V/DIV., 2 msec./DIV. Vehicle speed 20 km/h (12mph)
      Fig 6: Identifying Oscilloscope Waveform 5
      G05628951Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check waveform 6.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      C53-124 (NT+) - C53-123 (NT-) 1 V/DIV., 2 msec./DIV. Engine idling (shift lever in P or N)
      Fig 7: Identifying Oscilloscope Waveform 6
      G05628952Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check waveform 7.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      A38-10 (CANH) - C53-81 (E1) 1 V/DIV., 10 μsec./DIV. Engine switch on (IG)
      Fig 8: Identifying Oscilloscope Waveform 7
      G05628953Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Using an oscilloscope, check waveform 8.

      Reference: 

      WAVEFORM REFERENCE

      Terminal No. (Symbol) Tool Setting Condition
      A38-11 (CANL) - C53-81 (E1) 1 V/DIV., 10 μsec./DIV. Engine switch on (IG)
      Fig 9: Identifying Oscilloscope Waveform 8
      G05628954Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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