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Terminals Of Ecu

  1. CHECK HYBRID VEHICLE CONTROL ECU 
    Fig 1: Identifying ECU Connector Terminals
    G04475742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage of the connectors.
      SPECIFIED CONDITION CHART

      Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
      ST1 (H15-2) - GND1 (H14-1) G - W-B Stop light signal Power switch is ON (IG), Brake pedal depressed Below 0.5 V
      Power switch is ON (IG), Brake pedal released 9 to 14 V
      STP (H15-3) - GND1 (H14-1) L - W-B Power switch is ON (IG), Brake pedal depressed 9 to 14 V
      Power switch is ON (IG), Brake pedal released 2 to 3 V
      CCS (H14-13) - GND1 (H14-1) V - W-B Cruise control main switch circuit Power switch is ON (IG) 10 to 14 V
      Power switch is ON (IG), CANCEL switch is held on 6.6 to 10.1 V
      Power switch is ON (IG), -/SET switch is held on 4.5 to 7.1 V
      Power switch is ON (IG), +/RES switch is held on 2.3 to 4.0 V
      Power switch is ON (IG), ON-OFF button is pushed on Below 1 V
      SPDI (H14-19) - GND1 (H14-1) Vehicle speed input signal Power switch is ON (IG), slowly turn wheel Below 1 V to above 5 V

      If the result is not as specified, the ECU may have a malfunction.

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