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Terminals Of ECM [12/2019 - 10/2022]

  1. ECM 
    GTY913902Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

    The standard voltage and resistance of each ECM terminal 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 or resistance between the terminals is shown under "Specified Condition".

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

    Terminal No. (Symbol) Terminal Description Condition Specified Condition
    A28-1 (BATT) - C54-53 (E1) Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
    A28-2 (+B) - C54-53 (E1) Power source of ECM Ignition switch ON 11 to 14 V
    A28-3 (+B2) - C54-53 (E1) Power source of ECM Ignition switch ON 11 to 14 V
    A28-8 (+BM) - C54-53 (E1) Power source of ECM Always 11 to 14 V
    A28-13 (CANH) - C54-53 (E1) CAN communication line Ignition switch ON Pulse generation
    A28-17 (S) - C54-53 (E1) M shift position switch signal Ignition switch ON and shift lever in M 11 to 14 V
    Ignition switch ON and shift lever not in M Below 1 V
    A28-26 (CANL) - C54-53 (E1) CAN communication line Ignition switch ON Pulse generation
    A28-27 (STP) - C54-53 (E1) Stop light switch signal Brake pedal depressed 7.5 to 14 V
    Brake pedal released Below 1 V
    A28-37 (SFTD) - C54-53 (E1) Down-shift switch signal Ignition switch ON 11 to 14 V
    Ignition switch ON and shift lever held in "-" (Down shift) Below 1 V
    A28-38 (SFTU) - C54-53 (E1) Up-shift switch signal Ignition switch ON 11 to 14 V
    Ignition switch ON and shift lever held in "+" (Up shift) Below 1 V
    A28-39 (SPD) - C54-53 (E1) Vehicle speed signal from combination meter assembly Driving at 20 km/h (12 mph) Pulse generation
    A28-40 (SPCN) - C54-53 (E1) Drive mode select switch (Normal) signal Ignition switch ON and drive mode select switch (Normal) being pushed and held Below 1.5 V
    Ignition switch ON and drive mode select switch (Normal) not pushed 11 to 14 V
    A28-43 (STA) - C54-53 (E1) Starter signal Cranking (shift lever in P or N, ignition switch START) 11 to 14 V
    Ignition switch ON and shift lever in P or N Below 2 V
    A28-55 (PWMS) - C54-53 (E1) Drive mode select switch (Sport/Sport+) signal Ignition switch ON and drive mode select switch (Sport/Sport+) being pushed and held Below 1.5 V
    Ignition switch ON and drive mode select switch (Sport/Sport+) not pushed 11 to 14 V
    C54-6 (SL3+) - C54-7 (SL3-) Solenoid (SL3) valve signal 3rd, 7th or Reverse gear Pulse generation
    C54-10 (SL5+) - C54-11 (SL5-) Solenoid (SL5) valve signal 2nd or 8th gear Pulse generation
    C54-12 (SL1+) - C54-13 (SL1-) Solenoid (SL1) valve signal 1st, 2nd, 3rd, 4th or 5th gear Pulse generation
    C54-14 (SL4+) - C54-15 (SL4-) Solenoid (SL4) valve signal 4th or 6th gear Pulse generation
    C54-31 (SL2+) - C54-1 (SL2-) Solenoid (SL2) valve signal 5th, 6th, 7th or 8th gear Pulse generation
    C54-32 (SL6+) - C54-33 (SL6-) Solenoid (SL6) valve signal 1st or Reverse gear Pulse generation
    C54-53 (E1) - Body ground Ground Always Below 1 Ω
    C54-62 (SL) - C54-53 (E1) Solenoid (SL) valve signal
    • Shift lever in P, R or N
    • Lock-up OFF (shift lever in D)
    		 11 to 14 V
    C54-67 (SLT+) - C54-37 (SLT-) Solenoid (SLT) valve signal Engine idling Pulse generation
    C54-72 (NCO) - C54-53 (E1) Transmission Revolution Sensor (NC) signal Vehicle being driven Pulse generation
    C54-73 (NCB) - C54-53 (E1) Power source for sensor
    (specific voltage)    		 Ignition switch ON 11 to 14 V
    C54-74 (NTO) - C54-53 (E1) Transmission Revolution Sensor (NT) signal Engine idling (shift lever in P or N) Pulse generation
    C54-75 (NTB) - C54-53 (E1) Power source for sensor
    (specific voltage)    		 Ignition switch ON 11 to 14 V
    C54-76 (SLU+) - C54-61 (SLU-) Solenoid (SLU) valve signal Lock-up ON Pulse generation
    C54-86 (THO1) - C54-133 (ETHW) ATF temperature sensor signal ATF temperature 115°C (239°F) or higher Below 1.5 V
    C54-106 (NSW) - C54-53 (E1) Park/neutral position switch signal Ignition switch ON and shift lever in P or N Below 1 V
    Ignition switch ON and shift lever not in P or N 11 to 14 V
    C54-107 (R) - C54-53 (E1) R shift position switch signal Ignition switch ON and shift lever in R 11 to 14 V
    Ignition switch ON and shift lever not in R Below 1 V
    C54-108 (P) - C54-53 (E1) P shift position switch signal Ignition switch ON and shift lever in P 11 to 14 V
    Ignition switch ON and shift lever not in P Below 1 V
    C54-139 (D) - C54-53 (E1) D shift position switch signal Ignition switch ON and shift lever in D or M 11 to 14 V
    Ignition switch ON and shift lever not in D or M Below 1 V
    C54-140 (N) - C54-53 (E1) N shift position switch signal Ignition switch ON and shift lever in N 11 to 14 V
    Ignition switch ON and shift lever not in N Below 1 V
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