LANE DEPARTURE ALERT SYSTEM(w/o Dynamic Radar Cruise Control System) Steering Pad Switch Circuit

DESCRIPTION

The lane departure warning camera receives a lane departure alert main switch signal from the steering pad switch assembly.

WIRING DIAGRAM

*a	Lane Departure Alert Main Switch
*b	Steering Pad Switch Assembly
*c	Spiral Cable with Sensor Sub-assembly
*d	Lane Departure Warning Camera

PROCEDURE

1. INSPECT STEERING PAD SWITCH ASSEMBLY

   
   

   1. Remove the horn button assembly Click here.

   2. Disconnect the z5 spiral cable with sensor sub-assembly connector.

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

      

      Text in Illustration

      *1	Lane Departure Alert Main Switch	-	-
      *a	Component without harness connected (Steering Pad Switch Assembly)	-	-

      Standard Resistance
      Tester Connection Condition Specified Condition z5-4 (DIST) - z5-7 (ECC) Lane departure alert main switch being pushed and held 228 to 252 Ω Lane departure alert main switch not pushed 10 kΩ or higher

   4. Reconnect the z5 spiral cable with sensor sub-assembly connector.

   5. Reinstall the horn button assembly Click here.

   
   

   NG

   REPLACE STEERING PAD SWITCH ASSEMBLY Click here

   OK

2. INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

   Note

   The spiral cable with sensor sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable with sensor sub-assembly may cause airbag deployment. Be sure to read the pages shown in the brackets.

   Tech Tips

   
   

   • Removal Click here

   • Installation Click here

   
   

   1. Remove the spiral cable with sensor sub-assembly.

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

      

      Standard Resistance

      Tester Connection Condition Specified Condition z5-4 (DIST) - H22-12 (DIST) The spiral cable with sensor sub-assembly position is center 3 Ω or less The spiral cable with sensor sub-assembly position is 2.5 rotations to the left The spiral cable with sensor sub-assembly position is 2.5 rotations to the right z5-7 (ECC) - H22-2 (ECC) The spiral cable with sensor sub-assembly position is center 3 Ω or less The spiral cable with sensor sub-assembly position is 2.5 rotations to the left The spiral cable with sensor sub-assembly position is 2.5 rotations to the right

      Text in Illustration

      *a	Component without harness connected (Spiral Cable with Sensor Sub-assembly)
      *b	Steering Pad Switch Assembly Side
      *c	Vehicle Side

      Tech Tips

      The spiral cable with sensor sub-assembly makes a maximum of approximately 5 rotations.

   3. After setting the spiral cable with sensor sub-assembly to the center position, rotate the spiral cable with sensor sub-assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition z5-4 (DIST) - H22-12 (DIST) Always 3 Ω or less z5-7 (ECC) - H22-2 (ECC) Always 3 Ω or less

      Tech Tips

      The spiral cable with sensor sub-assembly makes a maximum of approximately 5 rotations.

   4. Reinstall the spiral cable with sensor sub-assembly.

   
   

   NG

   REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY Click here

   OK

3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - LANE DEPARTURE WARNING CAMERA)

   
   

   1. Disconnect the H22 spiral cable with sensor sub-assembly connector.

   2. Disconnect the T12 lane departure warning camera connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition H22-12 (DIST) - T12-4 (LKSW) Always 3 Ω or less

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition H22-12 (DIST) or T12-4 (LKSW) - Body ground Always 1 MΩ or higher

   4. Reconnect the T12 lane departure warning camera connector.

   5. Reconnect the H22 spiral cable with sensor sub-assembly connector.

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - BODY GROUND)

   
   

   1. Disconnect the H22 spiral cable with sensor sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition H22-2 (ECC) - Body ground Always Below 1 Ω

   3. Reconnect the H22 spiral cable with sensor sub-assembly connector.

   
   

   OK

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

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR