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Terminals Of ECM

  1. CHECK ECM 
    Fig 1: Identifying ECM Connector Terminals
    G05387960Courtesy 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 "Terminal No. (Symbols)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition".

      Use Fig 1 as a reference for the ECM terminals.

      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      B33-52 (NSW) - B33-104 (E1) W-BR Park/Neutral position switch signal
      • Ignition switch ON
      • Shift lever on P or N
      • Ignition switch ON
      • Shift lever not on P or N
      		 Below 2 V
      11 to 14 V
      A36-48 (STA) - B33-104 (E1) LG - BR Park/Neutral position switch signal Cranking 6.0 V or more
      B33-73 (P) - B33-104 (E1) V - BR P shift position switch signal
      • Ignition switch ON
      • Shift lever on P
      • Ignition switch ON
      • Shift lever not on P
      		 11 to 14 V
      Below 1 V
      B33-53 (R) - B33-104 (E1) R - BR R shift position switch signal
      • Ignition switch ON
      • Shift lever on R
      • Ignition switch ON
      • Shift lever not on R
      		 11 to 14 V
      Below 1 V
      B33-54 (N) - B33-104 (E1) B - BR N shift position switch signal
      • Ignition switch ON
      • Shift lever on N
      • Ignition switch ON
      • Shift lever not on N
      		 11 to 14 V
      Below 1 V
      B33-56 (D) - B33-104 (E1) P - BR D shift position switch signal
      • Ignition switch ON
      • Shift lever on D
      • Ignition switch ON
      • Shift lever not on D
      		 11 to 14 V
      Below 1 V
      B33-74 (S) - B33-104 (E1) L - BR S shift position switch signal
      • Ignition switch ON
      • Shift lever on S
      • Ignition switch ON
      • Shift lever not on S
      		 11 to 14 V
      Below 1 V
      A36-16 (SFTU) - B33-104 (E1) W-L - BR Up-shift position switch signal
      • Ignition switch ON
      • Shift lever on S
      • Ignition switch ON
      • Shift lever "+" position (up-shift)
      		 11 to 14 V
      Below 1 V
      A36-51 (SFTD) - B33-104 (E1) R - BR Down-shift position switch signal
      • Ignition switch ON
      • Shift lever on S
      • Ignition switch ON
      • Shift lever "-" position (down-shift)
      		 11 to 14 V
      Below 1 V
      A36-36 (STP) - B33-104 (E1) L - BR Stop light switch signal Brake pedal is depressed
      Brake pedal is released      		 Between 7.5 V and 14 V
      Below 1 V
      B33-57 (SL1+) - B33-77 (SL1-) G-P SL1 solenoid signal Engine idle speed
      Ignition switch ON
      1st gear
      Not on 1st gear      		 Pulse generation (see  b waveform 1)
      Pulse generation (see  b waveform 1)
      Pulse generation (see  b waveform 1)
      Below 1 V
      B33-58 (SL2+) - B33-59 (SL2-) Y-R SL2 solenoid signal Engine idle speed
      Ignition switch ON
      1st or 2nd gear
      3rd or 4th gear      		 Pulse generation (see  c waveform 2)
      Pulse generation (see  c waveform 2)
      Pulse generation (see  c waveform 2)
      Below 1 V
      B33-79 (DSL) - B33-104 (E1) G - BR DSL solenoid signal Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)
      Vehicle driving under lockup position      		 Below 1 V
      Pulse generation (see  d waveform 3)
      B33-76 (SLT+) - B33-75 (SLT-) R-GR SLT solenoid signal Engine idle speed Pulse generation (see  e waveform 4)
      B33-78 (S4) - B33-104 (E1) W - BR S4 solenoid signal Ignition switch ON
      4th gear
      Not on 4th gear      		 Below 1 V
      11 to 14 V
      Below 1 V
      B33-72 (THO1) - B33-95 (ETHO) LG - BR ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V
      B33-125 (NT+) - B33-124 (NT-) W-L Speed sensor NT signal Vehicle speed 20 km/h (12 mph) Pulse generation (see  f waveform 5)
      B33-101 (NC+) - B33-102 (NC-) R-W Speed sensor NC signal Vehicle speed 30 km/h (19 mph): (3rd gear) Engine speed 1,400 rpm Pulse generation (see  g waveform 6)
    2. Using an oscilloscope, check the waveform 1.

      Waveform 1 

      WAVEFORM 1 REFERENCE

      Item Content
      Terminal No. (Symbols) B33-57 (SL1+) - B33-77 (SL1-)
      Tool Setting 5 V/DIV., 1 msec./.DIV.
      Condition Engine idle speed
      Fig 2: Identifying Waveform 1
      G05196970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check the waveform 2.

      Waveform 2 

      WAVEFORM 2 REFERENCE

      Item Content
      Terminal No. (Symbols) B33-58 (SL2+) - B33-59 (SL2-)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 3: Identifying Waveform 2
      G05196970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using an oscilloscope, check the waveform 3.

      Waveform 3 

      WAVEFORM 3 REFERENCE

      Item Content
      Terminal No. (Symbols) B33-79 (DSL) - B33-104 (E01)
      Tool Setting 10 V/DIV, 100 msec./DIV.
      Condition Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)
      Fig 4: Identifying Waveform 3
      G05387963Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an oscilloscope, check the waveform 4.

      Waveform 4 

      WAVEFORM 4 REFERENCE

      Item Content
      Terminal No. (Symbols) B33-76 (SLT+) - B33-75 (SLT-)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine idle speed
      Fig 5: Identifying Waveform 4
      G05196970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 5.

      Waveform 5 

      WAVEFORM 5 REFERENCE

      Item Content
      Terminal No. (Symbols) B33-125 (NT+) - B33-124 (NT-)
      Tool Setting 5 V/DIV., 0.5 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)
      Fig 6: Identifying Waveform 5
      G05387965Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check the waveform 6.

      Waveform 6 

      WAVEFORM 6 REFERENCE

      Item Content
      Terminal No. (Symbols) B33-101 (NC+) - B33-102 (NC-)
      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: Identifying Waveform 6
      G05387966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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