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Home >> Lexus >> 2007 >> ES 350 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - System And Circuit Testing, Active Control Engine Mount System (Including DTC P16A0 - P16A4), On-Vehicle Inspection, Removal, Inspection & Installation >> Active Control Engine Mount System >> Terminals Of Ecu
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Terminals Of Ecu

Fig 1: Identifying ECU Connector Terminals
G05247890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ECU TERMINALS REFERENCE TABLE

Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
+B (A9-2) - GND (A9-12) B - GR +B (BATT) power supply Always 10 to 14 V
IG2 (A9-10) - GND (A9-12) P - GR Ignition power supply Engine switch on (IG) 10 to 14 V
ACT+ (A9-1) - ACT - (A9-3) R - L E-ACM actuator Idling Pulse generation (see  1 waveform 1)
VGS (A9-24) - GGND (A9-26) B - R Acceleration sensor power supply Engine switch on (IG) 4.5 to 5.2 V
GL1 (A9-19) - GGND (A9-26) W - R Acceleration sensor output voltage Engine switch on (IG) 0.11 to 4.46 V
TACH (A9-16) - GND (A9-12) B - GR Engine speed Idling Pulse generation (see  2 waveform 2)
CANH (A9-14) - GND (A9-12) G - GR MPX line Always Pulse generation (see  3 waveform 3)
CANL (A9-13) - GND (A9-12) R - GR MPX line Always Pulse generation (see  4 waveform 4)
  1. Waveform 1 
    1. Active control engine mount actuator signal
      WAVEFORM 1 REFERENCE

      Symbols (Terminal No.) Between ACT+ and ACT-
      Tool Setting 5 V/DIV, 10 ms./DIV.
      Condition Idling with warm engine

      HINT:

      • The duty ratio varies depending on the active control engine mount actuator operation.
      • Do not disconnect the active control engine mount ECU connector.
        Fig 2: Identifying Waveform 1
        G05247891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Waveform 2 
    1. Engine speed signal
      WAVEFORM 2 REFERENCE

      Symbols (Terminal No.) Between TACH and GND
      Tool Setting 5 V/DIV., 10 ms./DIV.
      Condition Idling

      HINT:

      The wavelength becomes shorter as the engine rpm increases.

      Fig 3: Identifying Waveform 2
      G04973001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Waveform 3 
    1. CAN communication signal
      WAVEFORM 3 REFERENCE

      Symbols (Terminal No.) Between CANH and E1
      Tool Setting 1 V/DIV., 10 μs/DIV.
      Condition Stop engine and engine switch on (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.

      Fig 4: Identifying Waveform 3
      G05247893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Waveform 4 
    1. CAN communication signal
      WAVEFORM 4 REFERENCE

      Symbols (Terminal No.) Between CANL and E1
      Tool Setting 1 V/DIV., 10 μs/DIV.
      Condition Stop engine and engine switch on (IG)

      HINT:

      The waveform varies depending on the CAN communication signal.

      Fig 5: Identifying Waveform 4
      G05183460Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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