LANE DEPARTURE ALERT SYSTEM Lane Departure Alert System Circuit

DESCRIPTION

When the ignition switch is ON, power is supplied to the pre-collision city sensor.

WIRING DIAGRAM

*1	from IG Circuit
*2	ECU-IG NO. 3
*3	Pre-collision City Sensor

CAUTION / NOTICE / HINT

PROCEDURE

1. INSPECT BATTERY VOLTAGE

   
   

   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.

      Tech Tips

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

   
   

   NEXT

2. CHECK PRE-COLLISION CITY SENSOR

   
   
   1. 

      Text in Illustration

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

      Disconnect the pre-collision city sensor connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition Q12-7 (IG1) - Body ground Ignition switch ON 11 to 14 V Q12-7 (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 Q12-10 (GND) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Use the GTS to check if the CAN communication system is functioning normally Click here.

      Result

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

   
   

   A

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   B

   GO TO CAN COMMUNICATION SYSTEM Click here