DYNAMIC RADAR CRUISE CONTROL SYSTEM > Distance Control Switch Circuit

for Preparation Click here


DESCRIPTION

The distance control switch sets 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 operating.

WIRING DIAGRAM


E169168E17


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (DISTANCE CONTROL SWITCH)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

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

    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.



NG
Go to step 2
OK

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

2.INSPECT STEERING PAD SWITCH ASSEMBLY


  1. Remove the steering pad switch assembly (Click here).


    E222835E01


    Text in Illustration 
    *a
    		Component without harness connected
    (Steering Pad Switch Assembly)
    		*1
    		Distance Control Switch

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    z4-4 - z4-7
    		Distance control switch ON
    		Below 2.5 Ω
    z4-4 - z4-7
    		Distance control switch OFF
    		1 MΩ or higher

  1. Install the steering pad switch assembly (Click here).



NG
REPLACE STEERING PAD SWITCH ASSEMBLY (Click here)
OK


3.INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

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



    E221021E05

  1. Remove the spiral with sensor cable sub-assembly (Click here).

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    z4-4 - H30-12 (DIST)
    		The spiral with sensor cable sub-assembly is centered
    		Below 1 Ω
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
    z4-7 - H30-2 (ECC)
    		The spiral with sensor cable sub-assembly is centered
    		Below 1 Ω
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the right

    Text in Illustration 
    *a
    		Component without harness connected
    (Spiral with Sensor Cable Sub-assembly)

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

  1. Reinstall the spiral with sensor cable sub-assembly (Click here).



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


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

  1. Disconnect the driving support ECU assembly connector.

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

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    H5-7 (MODE) - H30-12 (DIST)
    		Always
    		Below 1 Ω
    H5-7 (MODE) or H30-12 (DIST) - Body ground
    		Always
    		Below 1 Ω

  1. Reconnect the driving support ECU assembly connector.

  1. Reconnect the spiral with sensor cable sub-assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU)
OK


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


    E221496E01

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

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    H30-2 (ECC) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *a
    		Front view of wire harness connector
    (to Spiral with Sensor Cable Sub-assembly)

  1. Reconnect the spiral with sensor cable sub-assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)
OK

REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)