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Terminals Of Ecu

  1. CHECK ECM 
    Fig 1: Identifying Terminals Of ECU Connector
    G05289525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the ECM connectors.

      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 REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      NSW (E3-4) - E1 (E3-7) L-Y - BR Park/neutral position switch signal Ignition switch ON and shift lever on P or N Below 1 V
      NSW (E3-4) - E1 (E3-7) L-Y - BR Park/neutral position switch signal Ignition switch ON and shift lever not on P or N 10 to 14 V
      P (E3-6) - E1 (E3-7) W - BR Park position switch signal Ignition switch ON and shift lever on P 10 to 14 V
      P (E3-6) - E1 (E3-7) W - BR Park position switch signal Ignition switch ON and shift lever not on P Below 1 V
      R (E3-8) - E1 (E3-7) G - BR R shift position switch signal Ignition switch ON and shift lever on R 10 to 14 V
      R (E3-8) - E1 (E3-7) G - BR R shift position switch signal Ignition switch ON and shift lever not on R Below 1 V
      N (E3-32) - E1 (E3-7) G-R - BR Neutral position switch signal Ignition switch ON and shift lever on N 10 to 14 V
      N (E3-32) - E1 (E3-7) G-R - BR Neutral position switch signal Ignition switch ON and shift lever not on N Below 1 V
      D (E3-9) - E1 (E3-7) G-Y - BR D shift position switch signal Ignition switch ON and shift lever on D or S 10 to 14 V
      D (E3-9) - E1 (E3-7) G-Y - BR D shift position switch signal Ignition switch ON and shift lever not on D or S Below 1 V
      S (E5-9) - E1 (E3-7) G-B - BR S shift position switch signal Ignition switch ON and shift lever on S 10 to 14 V
      S (E5-9) - E1 (E3-7) G-B - BR S shift position switch signal Ignition switch ON and shift lever not on S Below 1 V
      SFTU (E5-30) - E1 (E3-7) L-Y - BR Up-shift switch signal Ignition switch ON and shift lever on S 10 to 14 V
      SFTU (E5-30) - E1 (E3-7) L-Y - BR Up-shift switch signal Ignition switch ON and shift lever in "+" position (up-shift) Below 1 V
      SFTD (E5-19) - E1 (E3-7) Y - BR Down-shift switch signal Ignition switch ON and shift lever on S 10 to 14 V
      SFTD (E5-19) - E1 (E3-7) Y - BR Down-shift switch signal Ignition switch ON and shift lever in "-" position (down-shift) Below 1 V
      STP (E5-4) - E1 (E3-7) G-R - BR Stop light switch signal Brake pedal is depressed 10 to 14 V
      STP (E5-4) - E1 (E3-7) G-R - BR Stop light switch signal Brake pedal is released Below 1 V
      OIL (E3-27) - EOIL (E3-26) G-Y - BR ATF temperature sensor signal ATF temperature 115°C (239°F) or more Below 1.5 V
      NT+ (E3-21) - NT- (E3-20) Y-L Speed sensor NT signal Engine is idling (shift lever on P or N) Pulse generation (see  bwaveform 1)
      SP2+ (E3-23) - SP2- (E3-22) G-R Speed sensor SP2 signal Vehicle speed 20 km/h (12 mph) Pulse generation (see  cwaveform 2)
      S1 (E3-19) - E1 (E3-7) G-R - BR S1 solenoid signal 1st gear Below 1 V
      S1 (E3-19) - E1 (E3-7) G-R - BR S1 solenoid signal Not on 1st gear 10 to 14 V
      S2 (E3-18) - E1 (E3-7) L-R - BR S2 solenoid signal 1st, 2nd or 6th gear 10 to 14 V
      S2 (E3-18) - E1 (E3-7) L-R - BR S2 solenoid signal 3rd, 4th or 5th gear Below 1 V
      S3 (E3-17) - E1 (E3-7) R - BR S3 solenoid signal 1st, 2nd or 3rd gear 10 to 14 V
      S3 (E3-17) - E1 (E3-7) R - BR S3 solenoid signal 4th, 5th or 6th gear Below 1 V
      S4 (E3-16) - E1 (E3-7) W - BR S4 solenoid signal 5th or 6th gear 10 to 14 V
      S4 (E3-16) - E1 (E3-7) W - BR S4 solenoid signal 1st, 2nd, 3rd or 4th gear Below 1 V
      SR (E3-2) - E1 (E3-7) G - BR SR solenoid signal 1st, 2nd, 3rd or 4th gear 10 to 14 V
      SR (E3-2) - E1 (E3-7) G - BR SR solenoid signal 5th or 6th gear Below 1 V
      SL1+ (E3-25) - SL1- (E3-24) R - W-L SL1 solenoid signal 5th or 6th gear Pulse generation (see  dwaveform 3)
      SL2+ (E3-11) - SL2- (E3-10) Y - G-Y SL2 solenoid signal Engine is idling Pulse generation (see  ewaveform 4)
      SLT+ (E3-35) - SLT- (E3-34) B - G-B SLT solenoid signal Engine is idling Pulse generation (see  fwaveform 5)
      SLU+ (E3-13) - SLU- (E3-12) L-Y - B-W SLU solenoid signal 5th (lock-up) or 6th (lockup) gear Pulse generation (see  gwaveform 6)
    2. Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference) 

      WAVEFORM 1 REFERENCE

      Item Content
      Symbols (Terminal No.) NT+ (E3-21) - NT- (E3-20)
      Tool Setting 1 V/DIV., 2 msec./DIV.
      Condition Engine is idling (shift lever on P or N)
      Fig 2: Identifying Waveform 1
      G05289526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference) 

      WAVEFORM 2 REFERENCE

      Item Content
      Symbols (Terminal No.) SP2+ (E3-23) - SP2- (E3-22)
      Tool Setting 2 V/DIV., 2 msec./DIV.
      Condition Vehicle speed 20 km/h (12 mph)
      Fig 3: Identifying Waveform 2
      G05289527Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference) 

      WAVEFORM 3 REFERENCE

      Item Content
      Symbols (Terminal No.) SL1+ (E3-25) - SL1- (E3-24)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition 5th or 6th gear
      Fig 4: Identifying Waveform 3
      G04948278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference) 

      WAVEFORM 4 REFERENCE

      Item Content
      Symbols (Terminal No.) SL2+ (E3-11) - SL2- (E3-10)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine Is Idling
      Fig 5: Identifying Waveform 4
      G04948278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference) 

      WAVEFORM 5 REFERENCE

      Item Content
      Symbols (Terminal No.) SLT+ (E3-35) - SLT- (E3-34)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition Engine Is idling
      Fig 6: Identifying Waveform 5
      G04948278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference) 

      WAVEFORM 6 REFERENCE

      Item Content
      Symbols (Terminal No.) SLU+ (E3-13) - SLU- (E3-12)
      Tool Setting 5 V/DIV., 1 msec./DIV.
      Condition 5th (lock-up) or 6th (lock-up) gear
      Fig 7: Identifying Waveform 6
      G04948284Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK PASSENGER SIDE JUNCTION BLOCK (PASSENGER SIDE JUNCTION BLOCK ECU) 
    Fig 8: Identifying Terminals Of P4 Connector
    G05289532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the ECU connector.

      HINT:

      Each ECU 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 ECU terminals.

      TERMINALS REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      PWR (P4-18) - Body ground GR-L PWR switch signal Ignition switch ON and pattern select switch (PWR) ON 0 to 1.5 V
      PWR (P4-18) - Body ground GR-L PWR switch signal Ignition switch ON and pattern select switch (PWR) OFF Pulse generation*
      SNOW (P4-17) - Body ground L-R SNOW switch signal Ignition switch ON and pattern select switch (SNOW) ON 0 to 1.5 V
      SNOW (P4-17) - Body ground L-R SNOW switch signal Ignition switch ON and pattern select switch (SNOW) OFF Pulse generation*
      HINT:
      *: Voltage is input intermittently as this is an intermittent circuit. (Voltage varies between a peak of 7.5 to 14 V and a low of 0 to 1.5 V.)
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