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Home >> Toyota >> 2017 >> Corolla SE, Automatic CVT Trans >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostics - Introduction (Model Code: ZRE172) >> Pre-Collision System >> Diagnosis System [08/2016 - ] >> Diagnosis System [08/2016 - ]
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Diagnosis System [08/2016 - ]

  1. CHECK DLC3 
    1. Check the DLC3.

      Refer to GENERAL INFORMATION [08/2013 - ]

  2. FUNCTION OF WARNING INDICATOR AND MESSAGE 
    1. If the pre-collision system is not functioning properly, the driver is warned by the PCS warning light and a warning message displayed on the multi-information display.
      Master Warning Indicator Warning Message Detail DTC PCS warning light
      Illuminated
      • "PRE-COLLISION SYSTEM MALFUNCTION VISIT YOUR DEALER" *1
      • "Pre-Collision System Malfunction Visit Your Dealer" *2
      		 Pre-collision system malfunctioning Stored Blinks
      Not illuminated
      • "PRE-COLLISION SYSTEM UNAVAILABLE" *1
      • "Pre-Collision System Unavailable" *2
      • Millimeter wave radar sensor assembly misaligned
      • Millimeter wave radar sensor assembly temperature malfunction
      • Millimeter wave radar sensor assembly low voltage malfunction
      		 Not stored Blinks
      Not illuminated
      • "PRE-COLLISION SYSTEM UNAVAILABLE CLEAN SENSOR" *1
      • "Pre-Collision System Unavailable Clean Sensor" *2
      		 Foreign matter attached to millimeter wave radar sensor assembly Not stored Blinks
      Not illuminated
      • "FRONT CAMERA UNAVAILABLE" *1
      • "Front Camera System Unavailable" *2
      • Abnormal forward recognition camera voltage
      • Forward recognition camera temperature outside of operational range
      • Other forward recognition camera malfunction
      		 Not stored Blinks
      Not illuminated
      • "FRONT CAMERA UNAVAILABLE REMOVE DEBRIS ON WIND SHIELD" *1
      • "Front Camera Unavailable Remove Debris On Windshield" *2
      		 Foreign matter attached to forward recognition camera or area of windshield in front of forward recognition camera Not stored Blinks
      Not illuminated
      • "VSC TURNED OFF PRE-COLLISION BRAKE SYSTEM UNAVAILABLE" *1
      • "VSC Turned Off Pre-Collision Brake System Unavailable" *2
      		 VSC system is disabled Not stored Illuminates

      () *1: for Dot LCD Type Multi-information Display*2: for Color Type Multi-information Display

      HINT: 

      PCS WARNING LIGHT ILLUMINATION STATUS

      PCS Warning Light Condition
      Blinks ON: 0.5 sec./OFF: 1.5sec. Pre-collision system malfunctioning (DTC stored)
      Pre-collision system temporarily disabled
      Illuminates Pre-collision system disabled
      VSC system disabled
      Not illuminated Other
  3. INITIAL CHECK 
    1. An initial check is performed when the ignition switch is off for more than 2 seconds and then turned to ON. The initial check consists of a pre-collision system diagnostic check with a duration of approximately 3 seconds.
    2. If a malfunction is detected during the initial check, the PCS warning light in the combination meter assembly will blink and a warning message indicating the pre-collision system is malfunctioning or disabled will be displayed on the multi-information display.
  4. CONSTANT CHECK 
    1. The driving support ECU assembly constantly monitors the pre-collision system for malfunctions after the ignition switch is turned to ON and the initial check (approximately 3 seconds) has completed.
    2. If a malfunction is detected during the constant check, the PCS warning light in the combination meter assembly will blink and a warning message indicating the pre-collision system is malfunctioning or disabled will be displayed on the multi-information display.
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