Pre-collision System Circuit [09/2014 - 11/2017]: Procedure

Result

Result: 

NEXT 

See step  2

1. Measure the battery voltage with the engine switch off.

   Standard Voltage

   11 to 14 V

2. Using the parts location and system diagram, check the system for blown-out fuses, open or short circuits in the wire harness(es) and connectors that are not properly connected by performing a visual check.

   HINT: 

   If the voltage is 11 V or less, replace or recharge the battery before proceeding to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Check driving support ECU assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Driving Support ECU Assembly)

   NOTE:

   As the connector may be damaged if a load of more than 10 kg (22 lb) is applied to it, do not apply any more load than necessary to the connector.

   1. Disconnect the Q1 driving support ECU assembly connector.
   2. Measure the voltage according to the value(s) in the table below.
      NOTE:

      DTCs may be output when connectors are disconnected during inspection. Therefore, make sure to clear the DTCs using the Techstream once the inspection has been completed.

      STANDARD VOLTAGE
      
      

      Tester Connection	Condition	Specified Condition
      Q1-30 (B) - Body ground	Engine switch on (IG)	11 to 14 V
      	Engine switch off	Below 1 V

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

      Tester Connection	Condition	Specified Condition
      Q1-25 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Adjust the reflector height.

   Refer to ADJUSTMENT [09/2014 - 11/2017]

2. Place the reflector.

   Refer to ADJUSTMENT [09/2014 - 11/2017]

3. Connect the Techstream to the DLC3.
4. Turn the Techstream on.
5. Turn the cruise control switch (ON/OFF button) on.
6. Enter the following menus: Powertrain / Radar Cruise / Utility / Beam Axis Misalignment Reading.
7. Check the amount of misalignment and make a note.

   Powertrain > Radar Cruise > Utility 

   Tester Display
   Beam Axis Misalignment Reading

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Use the Techstream to check if the CAN communication system is functioning normally.

   Result

   Proceed to
   CAN communication system DTCs are not output
   CAN communication system DTCs are output

Result: 

CAN communication system DTCs are output 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 11/2017] 

Result: 

CAN communication system DTCs are not output 

See step  6

1. Check for DTCs and note any codes that are output.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Trouble Codes 

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Clear DTCs 

3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

   Refer to DTC CHECK / CLEAR [09/2014 - 11/2017]

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Proceed to
   DTCs are not output
   DTCs are output

Result: 

DTCs are output 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 11/2017] 

Result: 

DTCs are not output 

See step  7

1. Using the Techstream, check the Data List.

   Refer to DATA LIST / ACTIVE TEST [09/2014 - 08/2016] , or refer to DATA LIST / ACTIVE TEST [08/2016 - 11/2017]

2. Using the Techstream, perform the Active Test.

   Refer to DATA LIST / ACTIVE TEST [09/2014 - 08/2016] , or refer to DATA LIST / ACTIVE TEST [08/2016 - 11/2017]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Check whether the vehicle control history (PCS operation history) matches the customer analysis.

   Refer to VEHICLE CONTROL HISTORY [09/2014 - 11/2017]

   Result

   Result	Proceed to
   Vehicle control history matches the customer analysis	A
   Vehicle control history does not match customer analysis or there is no vehicle control history	B

Result: 

A 

END 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 08/2016]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017]