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Terminals Of ECM

  1. CHECK ECM 
    Fig 1: Identifying Terminals Of ECM
    G04486228Courtesy 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.

      TERMINALS AND CONDITION REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      STAR (B30-52) - E1 (B30-104) W - BR Park/Neutral position switch signal Ignition switch ON and shift lever on P or N Below 2 V
      STAR (B30-52) - E1 (B30-104) W - BR Park/Neutral position switch signal Ignition switch ON and shift lever not on P or N 10 to 14 V
      P (B30-73) - E1 (B30-104) L - BR P shift position switch signal Ignition switch ON and transfer shift lever on P 10 to 14 V
      P (B30-73) - E1 (B30-104) L - BR P shift position switch signal Ignition switch ON and transfer shift lever not on P Below 1 V
      R (B30-53) - E1 (B30-104) R - BR R shift position switch signal Ignition switch ON and transfer shift lever on R 10 to 14 V
      R (B30-53) - E1 (B30-104) R - BR R shift position switch signal Ignition switch ON and transfer shift lever not on R Below 1 V
      N (B30-54) - E1 (B30-104) Y - BR N shift position switch signal Ignition switch ON and transfer shift lever on N 10 to 14 V
      N (B30-54) - E1 (B30-104) Y - BR N shift position switch signal Ignition switch ON and transfer shift lever not on N Below 1 V
      D (B30-56) - E1 (B30-104) B - BR D shift position switch signal Ignition switch ON and transfer shift lever on D or 3 10 to 14 V
      D (B30-56) - E1 (B30-104) B - BR D shift position switch signal Ignition switch ON and transfer shift lever not on D or 3 Below 1 V
      3 (A9-26) - E1 (B30-104) P - BR 3 shift position switch signal Ignition switch ON and transfer shift lever on 3 10 to 14 V
      3 (A9-26) - E1 (B30-104) P - BR 3 shift position switch signal Ignition switch ON and transfer shift lever not on 3 Below 1 V
      2 (B30-55) - E1 (B30-104) P - BR 2 shift position switch signal Ignition switch ON and transfer shift lever on 2 and L 10 to 14 V
      2 (B30-55) - E1 (B30-104) P - BR 2 shift position switch signal Ignition switch ON and transfer shift lever not on 2 and L Below 1 V
      L (B30-74) - E1 (B30-104) LG - BR L shift position switch signal Ignition switch ON and transfer shift lever on L 10 to 14 V
      L (B30-74) - E1 (B30-104) LG - BR L shift position switch signal Ignition switch ON and transfer shift lever not on L Below 1 V
      STP (A9-36) - E1 (B30-104) L - BR Stop light switch signal Brake pedal is depressed Between 10 V and 14 V
      STP (A9-36) - E1 (B30-104) L - BR Stop light switch signal Brake pedal is released Below 1 V
      SL1+ (B30-57) - SL1- (B30-77) V - P SL1 solenoid signal Engine idle speed Pulse generation (see )
      SL1+ (B30-57) - SL1- (B30-77) V - P SL1 solenoid signal Ignition switch ON Pulse generation (see )
      SL1+ (B30-57) - SL1- (B30-77) V - P SL1 solenoid signal 1st gear Pulse generation (see )
      SL1+ (B30-57) - SL1- (B30-77) V - P SL1 solenoid signal Not on 1st gear Below 1 V
      SL2+ (B30-58) - SL2- (B30-59) Y - L SL2 solenoid signal Engine idle speed Pulse generation (see )
      SL2+ (B30-58) - SL2- (B30-59) Y - L SL2 solenoid signal Ignition switch ON Pulse generation (see )
      SL2+ (B30-58) - SL2- (B30-59) Y - L SL2 solenoid signal 1st or 2nd gear Pulse generation (see )
      SL2+ (B30-58) - SL2- (B30-59) Y - L SL2 solenoid signal 3rd or O/D gear Below 1 V
      DSL (B30-79) - E01 (B30-45) G - BR DSL solenoid signal Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF) Below 1 V
      DSL (B30-79) - E01 (B30-45) G - BR DSL solenoid signal Vehicle driving under lock-up position Pulse generation (see )
      SLT+ (B30-76) - SLT- (B30-75) R - GR SLT solenoid signal Engine idle speed Pulse generation (see )
      S4 (B30-78) - E01 (B30-45) W - BR S4 solenoid signal Ignition switch ON Below 1 V
      S4 (B30-78) - E01 (B30-45) W - BR S4 solenoid signal O/D gear 10 to 14 V
      S4 (B30-78) - E01 (B30-45) W - BR S4 solenoid signal Not on O/D gear Below 1 V
      THO1 (B30-72) - ETHO (B30-95) LG-BR ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V
      NT+ (B30-125) - NT- (B30-124) W - R Speed sensor (NT) signal Vehicle speed 20 km/h (12 mph) Pulse generation (see )
      NC+ (B30-101) - NC- (B30-102) R - W 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

      Item Content
      Symbols (Terminal No.) SL1+ (B30-57) - SL1- (B30-77)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 2: Voltage Waveform Graph
      G04436513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference) 

      WAVEFORM REFERENCE

      Item Content
      Symbols (Terminal No.) SL2+ (B30-58) - SL2- (B30-59)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 3: Voltage Waveform Graph
      G04436513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using an oscilloscope, check the waveform 3.

      Waveform 3 (Reference) 

      WAVEFORM REFERENCE

      Item Content
      Symbols (Terminal No.) DSL (B30-79) - E01 (B30-45)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)
      Fig 4: Waveform 3 Graph
      G04486231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an oscilloscope, check the waveform 4.

      Waveform 4 (Reference) 

      WAVEFORM REFERENCE

      Item Content
      Symbols (Terminal No.) SLT+ (B30-76) - SLT- (B30-75)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 5: Voltage Waveform Graph
      G04436513Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 5.

      Waveform 5 (Reference) 

      WAVEFORM REFERENCE

      Item Content
      Symbols (Terminal No.) NT+ (B30-125) - NT- (B30-124)
      Tool Setting 5 V/DIV., 0.5 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)
      Fig 6: Waveform 5 Graph
      G04486233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check the waveform 6.

      Waveform 1 V/DIV. 6 (Reference) 

      WAVEFORM REFERENCE

      Item Content
      Symbols (Terminal No.) NC+ (B30-101) - NC- (B30-102)
      Tool Setting 1 V/DIV., 1 msec./DIV.
      Condition Vehicle speed 30 km/h (19 mph): (3rd gear)
      Engine speed 1,400 rpm
      Fig 7: Waveform 6 Graph
      G04486234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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