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Home >> Toyota >> 2013 >> Prius Plug-in >> Repair and Diagnosis (Single Page) >> External Pages >> Different variant/trim >> Section 144 (Wiper System / Washer System (W/Headlight Cleaner System) (Service Information) (Except Plug-In)) >> RELAY (w/ Headlight Cleaner System) >> On-Vehicle Inspection >> On-Vehicle Inspection
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On-Vehicle Inspection

WARNING: This page is about a different variant/trim than selected.
  1. INSPECT HEADLIGHT CLEANER CONTROL RELAY 
    1. Disconnect the A44 headlight cleaner control relay connector.
      Fig 1: Identifying Headlight Cleaner Control Relay Connector Terminals
      GTY219473Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A44-3 (IG) - Body ground Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      A44-6 (PB) - Body ground Always 11 to 14 V
      A44-1 (HDLO) - Body ground Light control switch in head position Below 1 V
      Light control switch off 11 to 14 V
      A44-2 (H) - Body ground Headlight cleaner switch off 11 to 14 V
      Headlight cleaner switch on Below 1 V
      A44-5 (FRWA) - Body ground Front washer switch off 11 to 14 V
      Front washer switch on Below 1 V

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

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A44-4 (E) - Body ground Always Below 1 Ω
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Headlight Cleaner Control Relay)

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

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