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Terminals Of ECM

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  1. CHECK ECM 
    Fig 1: Identifying ECM Connector Terminals
    G04487484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the ECM connector.

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

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

      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      P (B30-24) - E1 (B30-81) R - BR P shift position switch signal Ignition switch ON and transfer shift lever on P 10 to 14 V
      P (B30-24) - E1 (B30-81) R - BR P shift position switch signal Ignition switch ON and transfer shift lever not on P Below 1 V
      R (B30-25) - E1 (B30-81) B - BR R shift position switch signal Ignition switch ON and transfer shift lever on R 10 to 14 V
      R (B30-25) - E1 (B30-81) B - BR R shift position switch signal Ignition switch ON and transfer shift lever not on R Below 1 V
      N (B30-27) - E1 (B30-81) L-B - BR N shift position switch signal Ignition switch ON and transfer shift lever on N 10 to 14 V
      N (B30-27) - E1 (B30-81) L-B - BR N shift position switch signal Ignition switch ON and transfer shift lever not on N Below 1 V
      D (B30-26) - E1 (B30-81) L - BR D shift position switch signal Ignition switch ON and transfer shift lever on D or 3 10 to 14 V
      D (B30-26) - E1 (B30-81) L - BR D shift position switch signal Ignition switch ON and transfer shift lever not on D or 3 Below 1 V
      4 (A9-25) - E1 (B30-81) P - BR 4 shift position switch signal Ignition switch ON and transfer shift lever on 4 10 to 14 V
      4 (A9-25) - E1 (B30-81) P - BR 4 shift position switch signal Ignition switch ON and transfer shift lever not on 4 Below 1 V
      3 (B30-29) - E1 (B30-81) LG - BR 3 shift position switch signal Ignition switch ON and transfer shift lever on 3 10 to 14 V
      3 (B30-29) - E1 (B30-81) LG - BR 3 shift position switch signal Ignition switch ON and transfer shift lever not on 3 Below 1 V
      2 (B30-28) - E1 (B30-81) V - BR 2 shift position switch signal Ignition switch ON and transfer shift lever on 2 and L 10 to 14 V
      2 (B30-28) - E1 (B30-81) V - BR 2 shift position switch signal Ignition switch ON and transfer shift lever not on 2 and L Below 1 V
      L (A9-26) - E1 (B30-81) V - BR L shift position switch signal Ignition switch ON and transfer shift lever on L 10 to 14 V
      L (A9-26) - E1 (B30-81) V - BR L shift position switch signal Ignition switch ON and transfer shift lever not on L Below 1 V
      STP (A9-36) - E1 (B30-81) L - BR Stop light switch signal Brake pedal is depressed Between 10 V and 14 V
      STP (A9-36) - E1 (B30-81) L - BR Stop light switch signal Brake pedal is released Below 1 V
      SL1+ (B30-16) - SL1-(B30-17) P - LG SL1 solenoid signal Engine idle speed Pulse generation (see )
      SL1+ (B30-16) - SL1-(B30-17) P - LG SL1 solenoid signal Ignition switch ON Pulse generation (see )
      SL1+ (B30-16) - SL1-(B30-17) P - LG SL1 solenoid signal 1st gear Pulse generation (see )
      SL1+ (B30-16) - SL1-(B30-17) P - LG SL1 solenoid signal Not on 1st gear Below 1 V
      SL2+ (B30-12) - SL2-(B30-13) BR - R SL2 solenoid signal Engine idle speed Pulse generation (see )
      SL2+ (B30-12) - SL2-(B30-13) BR - R SL2 solenoid signal Ignition switch ON Pulse generation (see )
      SL2+ (B30-12) - SL2-(B30-13) BR - R SL2 solenoid signal 1st or 2nd gear Pulse generation (see )
      SL2+ (B30-12) - SL2-(B30-13) BR - R SL2 solenoid signal 3rd, 4th or 5th gear Below 1 V
      SL3+ (B30-14) - SL3-(B30-15) GR - G-R SL3 solenoid signal Engine idle speed Pulse generation (see )
      SL3+ (B30-14) - SL3-(B30-15) GR - G-R SL3 solenoid signal Ignition switch ON Pulse generation (see )
      SL3+ (B30-14) - SL3-(B30-15) GR - G-R SL3 solenoid signal 1st or 2nd gear Pulse generation (see )
      SL3+ (B30-14) - SL3-(B30-15) GR - G-R SL3 solenoid signal 3rd, 4th or 5th gear Below 1 V
      DSL (B30-9) - E01 (B30-22) V - BR DSL solenoid signal Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF) Below 1 V
      DSL (B30-9) - E01 (B30-22) V - BR DSL solenoid signal Vehicle driving under lockup position Pulse generation (see )
      SLT+ (B30-11) - SLT-(B30-10) L - W SLT solenoid signal Engine idle speed Pulse generation (see )
      SR (B30-8) - E01 (B30-22) G - BR SR solenoid signal Ignition switch ON Below 1 V
      SR (B30-8) - E01 (B30-22) G - BR SR solenoid signal 3th, 4th or 5th gear 10 to 14 V
      SR (B30-8) - E01 (B30-22) G - BR SR solenoid signal 1st or 2nd gear Below 1 V
      S4 (B30-7) - E01 (B30-22) L-B - BR S4 solenoid signal Ignition switch ON Below 1 V
      S4 (B30-7) - E01 (B30-22) L-B - BR S4 solenoid signal 5th gear 10 to 14 V
      S4 (B30-7) - E01 (B30-22) L-B - BR S4 solenoid signal Not on 5th gear Below 1 V
      THO1 (B30-126) - ETHO (B30-124) Y - B ATF temperature sensor signal ATF temperature 115°C (239°F) or more Below 1.5 V
      NT+ (B30-6) - NT- (B30-5) B - G Speed sensor (NT) signal Vehicle speed 20 km/h (12 mph) Pulse generation (see )
      NC+ (B30-4) - NC- (B30-3) W - Y Speed sensor (NC) signal Vehicle speed 30 km/h (19 mph) (3rd gear) Engine speed 1,400 rpm Pulse generation (see )
    2. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) SL1+ (B30-16) - SL1- (B30-17)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 2: Identifying Waveform 1
      G04487485Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) SL2+ (B30-12) - SL2- (B30-13)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 3: Identifying Waveform 2
      G04487486Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using an oscilloscope, check the waveform 3.

      Waveform 3 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) SL3+ (B30-14) - SL3- (B30-15)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 4: Identifying Waveform 3
      G04487487Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an oscilloscope, check the waveform 4.

      Waveform 4 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) DSL (B30-9) - E01 (B30-22)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)
      Fig 5: Identifying Waveform 4
      G04487488Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 5.

      Waveform 5 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) SLT+ (B30-11) - SLT- (B30-10)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 6: Identifying Waveform 5
      G04487489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check the waveform 6.

      Waveform 6 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) NT+ (B30-6) - NT- (B30-5)
      Tool Setting 5 V/DIV., 0.5 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)
      Fig 7: Identifying Waveform 6
      G04487490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    8. Using an oscilloscope, check the waveform 7.

      Waveform 7 (Reference) 

      WAVEFORM REFERENCE CHART

      Item Content
      Symbols (Terminal No.) NC+ (B30-4) - NC- (B30-3)
      Tool Setting 1 V/DIV., 1 msec./DIV.
      Condition Vehicle speed 30 km/h (19 mph) (3rd gear)
      Engine speed 1,400 rpm
      Fig 8: Identifying Waveform 7
      G04487491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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