DYNAMIC RADAR CRUISE CONTROL SYSTEM Distance Control Switch Circuit

DESCRIPTION

The distance control switch is used to set the distance for vehicle-to-vehicle distance control mode. The distance control switch is installed in the steering pad switch assembly. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch assembly (distance control switch) while the dynamic radar cruise control system is controlling vehicle speed in vehicle-to-vehicle distance control mode.

PROCEDURE

1. Click here

   READ VALUE USING GTS (DISTANCE CONTROL SWITCH)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Radar Cruise / Data List.

   5. Check the Data List to confirm function of the distance control switch.

      Table 2. Radar Cruise

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Distance Control Switch	Distance control switch signal / ON or OFF	ON: Distance control switch on OFF: Distance control switch off	-

      OK
      The display changes in accordance with switch operation.

   6. Turn the power switch off.

   
   
   • OK

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

   • NGClick here
2. Click here

   INSPECT STEERING PAD SWITCH ASSEMBLY

   
   
   1. 

      Remove the steering pad switch assembly (Click here)

      Table 3. Text in Illustration

      *1	Distance Control Switch	-	-
      *a	Component without harness connected (Steering Pad Switch Assembly)	-	-

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

      Standard Resistance
      Tester Connection Condition Specified Condition z5-4 - z5-7 Distance control switch ON 2.5 Ω or less z5-4 - z5-7 Distance control switch OFF 1 MΩ or higher

   3. Reinstall the steering pad switch assembly (Click here).

   
   
   • OKClick here
   • NG

     REPLACE STEERING PAD SWITCH ASSEMBLY (Click here)

3. Click here

   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 prevent the airbag from deploying. Be sure to read the pages shown in the brackets.

   Tip:
   

   • 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 (Check for Open)
      Tester Connection Condition Specified Condition z5-4 - H22-12 (DIST) Center 3 Ω or less 2.5 rotations to the left 2.5 rotations to the right z5-7 - H22-2 (ECC) Center 3 Ω or less 2.5 rotations to the left 2.5 rotations to the right

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

      Table 4. Text in Illustration

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

      Tip:

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

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

   
   
   • OKClick here
   • NG

     REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY (Click here)

4. Click here

   CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU ASSEMBLY - SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY)

   
   

   1. Disconnect the H75 driving support ECU assembly connector.

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

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition H75-6 (SPSW) - H22-12 (DIST) Always 3 Ω or less

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition H75-6 (SPSW) or H22-12 (DIST) - Body ground Always 1 MΩ or higher

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

   5. Reconnect the H75 driving support ECU assembly connector.

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

5. Click here

   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

      Result
      Result Proceed to NG A OK (for LHD) B OK (for RHD) C

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

   
   
   • A

     REPAIR OR REPLACE HARNESS OR CONNECTOR

   • B

     REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)

   • C

     REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)