ELECTRONIC CONTROLLED AUTOMATIC TRANSMISSION SYSTEM TERMINALS OF ECM


  1. ECM

    A01BEK5E01

    Tech Tips

    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 be inspected. The standard voltage between the terminals is shown under "Specific Condition".

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

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    L (B7-9) - E1 (D1-3) R - BR L shift position switch signal IG switch ON and shift lever L position 10 to 14 V
    ↑ ↑ ↑ IG switch ON and shift lever L position Below 1 V
    2 (B7-10) - E1 (D1-3) Y - BR 2 shift position switch signal IG switch ON and shift lever 2 and L position 10 to 14 V
    ↑ ↑ ↑ IG switch ON and shift lever except 2 and L position Below 1 V
    R (B7-11) - E1 (D1-3) L - BR R shift position switch signal IG switch ON and shift lever R position 10 to 14 V
    ↑ ↑ ↑ IG switch ON and shift lever except R position Below 1 V
    3 (B7-19) - E1 (D1-3) B - BR 3 shift position switch signal IG switch ON and shift lever 3 position 10 to 14 V
    ↑ ↑ ↑ IG switch ON and shift lever except 3 position Below 1 V
    STP (B7-4) - E1 (D1-3) R-W - BR Stop lamp switch signal Brake pedal is depressed 7.5 to 14 V
    ↑ ↑ ↑ Brake pedal is released Below 1.5 V
    S2 (D3-8) - E1 (D1-3) P-L - BR S2 solenoid signal 2nd or 3rd gear 10 to 14 V
    ↑ ↑ ↑ 1st or 4th gear Below 1 V
    S1 (D3-9) - E1 (D1-3) LG - BR S1 solenoid signal 1st or 2nd gear 10 to 14 V
    ↑ ↑ ↑ 3rd or 4th gear Below 1 V
    SLT+ (D3-12) - SLT- (D3-13) L - W-L SLT solenoid signal Engine idle speed

    Pulse generation

    (See waveform 1)
    SL (D3-11) - E1 (D1-3) GR - BR SL solenoid signal IG switch ON Below 1.5 V
    ↑ ↑ ↑ Vehicle driving under lock-up position 10 to 14 V
    THOC (D1-22) - E2 (D1-28) B-W - Y-R ATF temperature sensor signal No.1 ATF temperature: 115°C (239°F) or more Below 1.5 V
    SP2+ (D3-35) - SP2- (D3-27) G - R Speed sensor (SP2) signal Vehicle speed 20 km/h (12 mph)

    Pulse generation

    (See waveform 3)
    NCO+ (D3-34) - NCO- (D3-26) Y - L Speed sensor (NCO) signal Engine idle speed

    Pulse generation

    (See waveform 2)
    NSW (B9-30) - E1 (D1-3) B-W - BR Park neutral switch signal IG switch ON and shift lever P and N position Below 2 V
    ↑ ↑ ↑ IG switch ON and shift lever except P and N position 10 to 14 V

    1. A01BAFDE05

      Waveform 1

      Reference:
      Terminal SLT+ - SLT-
      Tool setting 5 V/DIV, 1ms/DIV
      Vehicle condition Engine idle speed
    2. A01BEP7E03

      Waveform 2

      Reference:
      Terminal NCO+ - NCO-
      Tool setting 5 V/DIV, 0.5 ms/DIV
      Vehicle condition Engine idle speed (P or N position)
    3. A01BEVUE05

      Waveform 3

      Reference:
      Terminal SP2+ - SP2-
      Tool setting 2 V/DIV, 20 ms/DIV
      Vehicle condition Vehicle speed 20 km/h (12 mph)