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Terminals Of ECM

  1. ECM 
    Fig 1: Identifying ECM Terminals
    G04028223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Each ECM terminal's standard voltage is shown in the table below.

    In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to inspected. The standard voltage between the terminals is shown under "Specific Condition".

    Use the illustration above as a reference for the ECM terminals.

    ECM TERMINALS VOLTAGE SPECIFICATIONS

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    D (E7-9) - E1 (E7-7) R-W - BR D shift position switch signal Engine switch on (IG) and shift lever D and S position 10 to 14 V
    Engine switch on (IG) and shift lever except D and S position Below 1 V
    R (E7-8) - E1 (E7-7) R - BR R shift position switch signal Engine switch on (IG) and shift lever R position 10 to 14 V
    Engine switch on (IG) and shift lever except R position Below 1 V
    STP (A7-4) - E1 (E7-7) G - BR Stop light switch signal Brake pedal is depressed 7.5 to 14 V
    Brake pedal is released Below 1.5 V
    SFTD (A7-19) - E1 (E7-7) O - BR Down shift switch signal Engine switch on (IG) and shift lever S position 10 to 14 V
    Engine switch on (IG) and shift lever "-" position (Down shift) Below 1 V
    SFTU (A7-30) - E1 (E7-7) Y-R - BR Up shift switch signal Engine switch on (IG) and shift lever S position 10 to 14 V
    Engine switch on (IG) and shift lever "+" position (Up shift) Below 1 V
    S (A7-9) - E1 (E7-7) W-G - BR S shift position switch signal Engine switch on (IG) and shift lever S position 10 to 14 V
    Engine switch on (IG) and shift lever except S position Below 1 V
    P (E7-6) - E1 (E7-7) W - BR Park position switch signal Engine switch on (IG) and shift lever P position 10 to 14 V
    Engine switch on (IG) and shift lever except P position Below 1 V
    N (E7-32) - E1 (E7-7) G-R - BR Neutral position switch signal Engine switch on (IG) and shift lever N position 10 to 14 V
    Engine switch on (IG) and shift lever except N position Below 1 V
    STAR (E7-4) - E1 (E7-7) L-Y - BR Park neutral switch signal Engine switch on (IG) and shift lever P and N position Below 1 V
    Engine switch on (IG) and shift lever except P and N position 10 to 14 V
    SLU+ (E7-13) - SLU- (E7-12) L-Y - L-R SLU solenoid signal 5th (lock up) or 6th (lock up) gear Pulse generation (See WAVEFORM 2 REFERENCE  )
    SR (E7-2) - E1 (E7-7) G-W - BR SR solenoid signal 1st, 2nd, 3rd or 4th gear 10 to 14 V
    5th or 6th gear Below 1 V
    S4 (E7-16) - E1 (E7-7) G-R - BR S4 solenoid signal 5th or 6th gear 10 to 14 V
    1st, 2nd, 3rd or 4th gear Below 1 V
    S3 (E7-17) - E1 (E7-7) G - BR S3 solenoid signal 1st, 2nd or 3rd gear 10 to 14 V
    4th, 5th or 6th gear Below 1 V
    S2 (E7-18) - E1 (E7-7) W - BR S2 solenoid signal 1st, 2nd or 6th gear 10 to 14 V
    3rd, 4th or 5th gear Below 1 V
    S1 (E7-19) - E1 (E7-7) R - BR S1 solenoid signal 1st gear Below 1 V
    Except 1st gear 10 to 14 V
    SL2+ (E7-11) - SL2- (E7-10) L-W - B-W SL2 solenoid signal Engine idle speed Pulse generation (See WAVEFORM 3 REFERENCE  )
    SL1+ (E7-25) - SL1- (E7-24) Y - L SL1 solenoid signal 5th or 6th gear Pulse generation (See WAVEFORM 4 REFERENCE  )
    SP2+ (E7-23) - SP2- (E7-22) L - Y Speed sensor (SP2) signal Vehicle speed 20 km/h (12 mph) Pulse generation (See WAVEFORM 6 REFERENCE  )
    NT+ (E7-21) - NT- (E7-20) R - G Speed sensor (NT) signal Engine idle speed Pulse generation (See WAVEFORM 5 REFERENCE  )
    SLT+ (E7-35) - SLT- (E7-34) B - G-B SLT solenoid signal Engine idle speed Pulse generation (See WAVEFORM 1 REFERENCE  )
    OIL (E7-27) - EOIL (E7-26) G-Y - BR ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V
    1. Waveform 1

      Reference: 

      WAVEFORM 1 REFERENCE

      Terminal SLT+ - SLT-
      Tool setting 5 V/DIV, 1ms/DIV
      Vehicle condition Engine idle speed
      Fig 2: Identifying Voltage Waveform Pattern
      G04089028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2

      Reference: 

      WAVEFORM 2 REFERENCE

      Terminal SLU+ - SLU-
      Tool setting 5 V/DIV, 1ms/DIV
      Vehicle condition 5th (lock up) or 6th (lock up) gear
      Fig 3: Identifying Voltage Waveform Pattern
      G04089028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Waveform 3

      Reference: 

      WAVEFORM 3 REFERENCE

      Terminal SL2+ - SL2-
      Tool setting 5 V/DIV, 1ms/DIV
      Vehicle condition Engine idle speed
      Fig 4: Identifying Voltage Waveform Pattern
      G04089028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Waveform 4

      Reference: 

      WAVEFORM 4 REFERENCE

      Terminal SL1+ - SL1-
      Tool setting 5 V/DIV, 1ms/DIV
      Vehicle condition 5th or 6th gear
      Fig 5: Identifying Voltage Waveform Pattern
      G04089028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Waveform 5

      Reference: 

      WAVEFORM 5 REFERENCE

      Terminal NT+ - NT-
      Tool setting 1 V/DIV, 2ms/DIV
      Vehicle condition Engine idle speed (P or N position)
      Fig 6: Signal Waveform Graph (Waveform 5)
      G04028228Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Waveform 6

      Reference: 

      WAVEFORM 6 REFERENCE

      Terminal SP2+ - SP2-
      Tool setting 2 V/DIV, 20ms/DIV
      Vehicle condition Vehicle speed 20 km/h (12 mph)
      Fig 7: Signal Waveform Graph (Waveform 6)
      G04028229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Cowl Side J/B ECU (Multiplex network Body ECU) 
    Fig 8: Identifying Cowl Side J/B ECU Terminals
    G04028230Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Each ECU terminal's standard voltage is shown in the table below.

    In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to inspected. The standard voltage between the terminals is shown under "Specific Condition".

    Use the illustration above as a reference for the ECU terminals.

    COWL SIDE J/B ECU TERMINALS VOLTAGE SPECIFICATIONS

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    PWR (K68-18) - Body ground P PWR switch signal Engine switch on (IG) and Pattern select switch (PWR) ON 0 to 1.5 V
    Engine switch on (IG) and Pattern select switch (PWR) OFF Pulse generation *1
    SNOW (K68-17) - Body ground L SNOW switch signal Engine switch on (IG) and Pattern select switch (SNOW) ON 0 to 1.5 V
    Engine switch on (IG) and Pattern select switch (SNOW) OFF Pulse generation *1

    HINT:

    *1: Voltage is input intermittently as this is an intermittent circuit. (Voltage varies between a peak of 7.5 to 14 V and a low of 0 to1.5 V.)

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