Pre-collision System Circuit [08/2016 - ]: Procedure

1. Measure the battery voltage with the ignition 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.

NEXT 

See step  2

1. Check pre-collision city sensor.
   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.

   1. Disconnect the N5 pre-collision city sensor connector.

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a	Front view of wire harness connector (to Pre-collision City Sensor)

   2. Measure the voltage according to the value (s) in the table below.

      Standard Voltage

      Tester Connection	Condition	Specified Condition
      N5-7 (IG1) - Body ground	Ignition switch ON	11 to 14 V
      N5-7 (IG1) - Body ground	Ignition 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
      N5-10 (GND) - Body ground	Always	Below 1 Ω

   4. Connect the N5 pre-collision city sensor connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

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

   Refer to DIAGNOSIS SYSTEM [08/2016 - ]

   Result

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

Result: 

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2016 - ] 

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - ]