PRE-COLLISION SYSTEM DATA LIST / ACTIVE TEST


  1. DATA LIST

    Note

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

    Tech Tips

    Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.

    5. Read the Data List according to the display on the Techstream.

      Pre-Collision 2
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Wiper Information Wiper operational status/Unoperat, Oil off, Mist, Washer, Unknown, Intermi, Lo or Hi The respective operational status displayed -
      PCS OFF Switch Pre-collision system cancel switch assembly status/ON or OFF

      ON: Pre-collision system cancel switch assembly on

      OFF: Pre-collision system cancel switch assembly off

      		 -
      Pre-Collision System Pre-collision system control/Valid or Inval

      Valid: Pre-collision system control possible

      Inval: Pre-collision system control not possible

      		 -
      PCS Indicator "Check Pre-Collision System" display request signal/ON or OFF

      ON: "Check Pre-Collision System" display requested

      OFF: "Check Pre-Collision System" display not requested

      		 -
      PCS Disabled Indicator "Pre-Collision System Temporarily Not Available" display request signal/ON or OFF

      ON: "Pre-Collision System Temporarily Not Available" display requested

      OFF: "Pre-Collision System Temporarily Not Available" display not requested

      		 -
      Pre-Collision Safety Warning Buz Pre-collision system warning buzzer/Valid or Inval

      Valid: Pre-collision system warning buzzer operation possible

      Inval: Pre-collision system warning buzzer operation not possible

      		 -
      Pre-Collision Brake Pre-collision brake function/Valid or Inval

      Valid: Pre-collision brake operation possible

      Inval: Pre-collision brake operation not possible

      		 -
      PBA Start Pre-collision brake assist activation signal/ON or OFF

      ON: Pre-collision brake assist activated

      OFF: Pre-collision brake assist not activated

      		 Signal status changes when the pre-collision brake assist is activated before a crash (Pre-collision brake will activate only in situations where the driver depresses the brake pedal)
      Brake Assist Standby Supplemental brake pressure signal/ON or OFF

      ON: Supplemental brake pressure being provided

      OFF: Supplemental brake pressure not being provided

      		 Signal status changes when supplemental brake pressure is being provided after a crash is judged as unavoidable and before the brake pedal is depressed
      Pre-Collision Brake Control Pre-collision brake operational status/ON or OFF

      ON: Pre-collision brake operating

      OFF: Pre-collision brake not operating

      		 Status changes when pre-collision brake operates before a crash
      CCS Cancel Automatic cancellation of cruise control during pre-collision brake activation/ON or OFF

      ON: Cruise control automatically canceled

      OFF: Cruise control not automatically canceled

      		 -
      Pre-Crash Safety Brake Ind Pre-collision system "BRAKE!" alert status

      ON: Pre-collision system "BRAKE!" alert on

      OFF: Pre-collision system "BRAKE!" alert off

      		 -
      Front Radar-Dirt History Millimeter wave radar sensor assembly environment condition history/ON or OFF

      ON: History of excessive bad environment

      OFF: No history of excessive bad environment

      		 -
      Front Radar-Environment Hist Millimeter wave radar sensor assembly environment condition history/Good or Bad

      Good: No history of excessive bad environment

      Bad: History of excessive bad environment

      		 -
      Country# (DSS) Destination country for driving support ECU assembly/JPN, NA, EURO, CA, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code -
      The Number of DTCs Number of DTCs/min: 0, max: 255 Number of DTCs will be displayed -

    6. Enter the following menus: Powertrain / Radar Cruise / Data List.

    7. Read the Data List according to the display on the Techstream.

      Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Country# (F Radar Sens) Destination country for millimeter wave radar sensor assembly/JPN, NA, EURO, CA, AUS, SAFC, OTHER, TWN, CHINA, THAI, GCC or NOFIX Actual country code -

    8. Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

    9. Read the Data List according to the display on the Techstream.

      ABS/VSC/TRAC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Stop Light Relay Output Stop light control relay (STOP relay) output/ON or OFF

      ON: Relay output on (Stop light on)

      OFF: Relay output off (Stop light off)

      		 -

  2. ACTIVE TEST

    Tech Tips

    Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Active Test.

    5. Perform Active Test according to the display on the Techstream.

      Tech Tips

      The power switch must be turned on (IG) to proceed with the Active Test using the Techstream.

      Pre-Collision 2
      Tester Display Test Part Control Range Diagnostic Note
      PCS Crash Alarm Buzzer Skid control buzzer assembly ON or OFF Buzzer can be heard
      PCS Approach Alarm Buzzer Skid control buzzer assembly ON or OFF Buzzer can be heard

    6. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    7. Perform Active Test according to the display on the Techstream.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Precrash PCS warning light ON or OFF -

    8. Enter the following menus: Chassis / ABS/VSC/TRAC / Active Test.

    9. Perform Active Test according to the display on the Techstream.

      ABS/VSC/TRAC
      Tester Display Test Part Control Range Diagnostic Note
      Stop Light Relay Stop light control relay (STOP relay) ON or OFF Stop lights come on