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Terminals Of Ecu

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. TCM 
    Fig 1: TCM Connector Terminal Identification
    GTY186366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

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

    In the table, first follow the information under "Condition". Look under "Terminals No. (Symbols)" 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 TCM terminals.

    Terminals No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    B53-15 (R) - B53-8 (E1) W - B R shift position switch signal IG switch ON (IG) and shift lever in R position 11 to 14 V
    IG switch ON (IG) and shift lever except R position Below 1 V
    B53-16 (D) - B53-8 (E1) R - B D shift position switch signal IG switch ON (IG) and shift lever in D and S position 11 to 14 V
    IG switch ON (IG) and shift lever except D and S position Below 1 V
    B53-12 (STP) - B53-8 (E1) B - B Stop light switch signal Brake pedal is depressed 7.5 to 14 V
    Brake pedal is released Below 1.5 V
    B53-11 (NSW) - B53-8 (E1) L - B Park/neutral switch signal IG switch ON (IG) and shift lever in P or N position Below 2 V
    IG switch ON (IG) and shift lever except P or N position 11 to 14 V
    B53-10 (STA) - B53-8 (E1) Y - B Starter signal Cranking (shift lever position in P or N position, ignition switch START) 11 to 14 V
    IG switch ON (IG) and shift lever except P or N position Below 2 V
    B53-3 (SPD) - B53-8 (E1) BR - B Speed signal from combination meter Vehicle speed 12 mph (20 km/h) Pulse generation
    (See  Fig. 10 waveform 1)
    B53-1 (BATT) -B53-8 (E1) W-L - B Battery (for measuring battery voltage and for TCM memory) Always 9 to 14 V
    B53-13 (IGSW) - B53-8 (E1) L-B - B Ignition switch Ignition switch ON (IG) 9 to 14 V
    B53-18 (+B) - B53-8 (E1) G - B Power source of TCM Ignition switch ON (IG) 9 to 14 V
    B53-6 (CAN+) - B53-8 (E1) B - B CAN communication line Engine is stopped and Ignition switch ON (IG) Pulse generation
    (See  Fig. 11 waveform 2)
    B53-7 (CAN-) - B53-8 (E1) Y - B CAN communication line Engine is stopped and Ignition switch ON (IG) Pulse generation
    (See  Fig. 12 waveform 3)
    1. Waveform 1
      Fig 2: Identifying Waveform 1
      GTY122654Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      REFERENCE:

      Terminal SPD - E1
      Tool setting 2 V/DIV., 20 ms./DIV.
      Vehicle condition Vehicle speed 12 mph (20 km/h)
    2. Waveform 2
      Fig 3: Identifying Waveform 2
      GTY108643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      REFERENCE:

      Terminal CAN+ - E1
      Tool setting 1 V/DIV., 10 ms./DIV.
      Vehicle condition Engine is stopped, ignition ON (IG)
    3. Waveform 3
      Fig 4: Identifying Waveform 3
      GTY101470Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      REFERENCE:

      Terminal CAN- - E1
      Tool setting 1 V/DIV., 10 ms./DIV.
      Vehicle condition Engine is stopped, ignition ON (IG)
  2. ECM 

    HINT: 

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

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

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

    Fig 5: ECM Connector Terminal Identification
    GTY169273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminals No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    A55-25 (S) - B50-81 (E1) Y - W-B S shift position switch signal IG switch ON (IG) and shift lever in S position 11 to 14 V
    IG switch ON (IG) and shift lever except S position Below 1 V
    A55-16 (SFTU) - B50-81 (E1) R - W-B Up shift switch signal IG switch ON (IG) and shift lever in S position 11 to 14 V
    IG switch ON (IG) and shift lever in "+" position (Up shift) Below 1 V
    A55-51 (SFTD) - B50-81 (E1) L - W-B Down shift switch signal IG switch ON (IG) and shift lever in S position 11 to 14 V
    IG switch ON (IG) and shift lever in "-" position (Down shift) Below 1 V
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