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HOMESERVICE MANUALSTOYOTA2009COROLLA S, 1.8 U, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEWINDOWSWINDSHIELD/WINDOW GLASSWINDOW DEFOGGER SYSTEM (FOR MANUAL AIR CONDITIONING SYSTEM)TERMINALS OF ECU
2009 Toyota Corolla S, 1.8 U, Standard

Terminals Of Ecu

2009 Toyota Corolla S, 1.8 U, StandardSECTION Terminals Of Ecu
  1. CHECK HEATER CONTROL (BLOWER SWITCH) 
    1. Disconnect the E70 heater control (blower switch) connector.
      Fig 1: Identifying E70 Heater Control (Blower Switch) Connector
      G06016002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E70-2 (RDEF) - E70-5 (E) B - W-B(1)
      BE - W-B(2)      		 Rear defogger signal Ignition switch ON, Rear window defogger switch OFF 11 to 14 V
      Ignition switch ON, Rear window defogger switch ON Below 1 V
      E70-3 (IG+) - E70-5 (E) Y - W-B(1)
      R - W-B(2)      		 Power source (IG) Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      (1) TMC Made
      (2) NUMMI, TMMC Made

      If the result is not as specified, there may be a malfunction in the wire harness.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E70-5 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness.

  2. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 
    1. Disconnect the 2F, 2G and 2Q instrument panel junction block connectors.
      Fig 2: Identifying 2F, 2G And 2Q Instrument Panel Junction Block Connectors
      G06015985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      2G-1 - Body ground W - Body ground Power source Always 11 to 14 V
      2Q-12 - Body ground B - Body ground(1)
      BE - Body ground(2)      		 DEF Relay operation signal Ignition switch ON, Rear window defogger switch OFF 11 to 14 V
      Ignition switch ON, Rear window defogger switch ON Below 1 V
      2F-2 - Body ground B - Body ground Defogger wire operation signal Ignition switch ON, Rear window defogger switch OFF Below 1 V
      Ignition switch ON, Rear window defogger switch ON 11 to 14 V
      (1) TMC Made
      (2) NUMMI, TMMC Made

      If the result is not as specified, there may be a malfunction in the wire harness or main body ECU (instrument panel junction block).

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.