LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2012 >> Sienna SE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Heated Glass/Defoggers >> Window Deicer (Diagnostics & Symptom Tests) >> Windshield Deicer System >> Terminals Of Ecu >> Terminals Of Ecu

Terminals Of Ecu

  1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY 
    1. Disconnect the D75 air conditioning amplifier assembly connector.
      Fig 1: ECU Connector Terminal Identification - Air Conditioning Amplifier Assembly
      GTY298168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D75-1 (IG+) - D75-14 (GND) R - W-B Power source (IG) Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      D75-21 (B) - D75-14 (GND) P - W-B Power source (Back-up) Always 11 to 14 V
      D75-14 (GND) - 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.

    3. Reconnect the D75 air conditioning amplifier assembly connector.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D75-38 (RDFG) - D75-14 (GND) Y - W-B Rear window 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
      D75-37 (LIN1) - D75-14 (GND) LG - W-B LIN communication line Ignition switch ON Pulse generation

      If the result is not as specified, the air conditioning amplifier assembly may have a malfunction.

  2. CHECK AIR CONDITIONING CONTROL ASSEMBLY 
    1. Disconnect the D69 air conditioning control assembly connector.
      Fig 2: ECU Connector Terminal Identification - Air Conditioning Control Assembly
      GTY301595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D69-4 (IG+) - D69-5 (GND) R - W-B Power source (IG) Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      D69-5 (GND) - 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.

    3. Reconnect the D69 air conditioning control assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D69-8 (LIN1) - D69-5 (GND) LG - W-B LIN communication line Ignition switch ON Pulse generation

      If the result is not as specified, the air conditioning control assembly may have a malfunction.

scientia non olet · About LEMON Manuals