Pre-collision System Circuit [08/2015 - ]: Procedure

1. Check the customer problem analysis and symptom (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] ).

Result: 

NEXT 

See step  2

1. Measure the battery voltage.

   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: 

NEXT 

See step  3

1. Disconnect the driving support ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   E117-7 (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
   E117-28 (GND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to driving support ECU assembly)

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Use the Techstream to check if the CAN communication system is functioning normally (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - ] ).
   RESULT
   
   

   Result	Proceed to
   CAN communication system DTCs are not output	A
   CAN communication system DTCs are output	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

Result: 

A 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
4. Check the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - ] ).
5. Clear for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - ] ).
6. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs. (Refer to DTC CHECK / CLEAR [08/2015 - ] ).
   RESULT
   
   

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART 

Result: 

A 

See step  6

1. Using the Techstream, check the Data List (Refer to DATA LIST / ACTIVE TEST [08/2015 - ] ).
2. Using the Techstream, perform the Active Test (Refer to DATA LIST / ACTIVE TEST [08/2015 - ] ).

Result: 

NEXT 

See step  7

1. Check whether the vehicle control history (PCS operation history) matches the customer analysis (Refer to VEHICLE CONTROL HISTORY [08/2015 - ] ).
   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