DYNAMIC RADAR CRUISE CONTROL SYSTEM > Distance Control Switch Circuit

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DESCRIPTION

The distance control switch sets the vehicle-to-vehicle distance mode. The distance control switch is installed in the steering pad switch. The vehicle-to-vehicle distance set value can be changed by operating the steering pad switch (distance control switch) while the dynamic radar cruise control system is in operation. The steering pad switch uses the BEAN to communicate with each ECU. Therefore it does not have a direct connection with the ECM. If there are any malfunctions in the communication line of the steering pad switch, one or more DTCs in the multiplex communication system are output.

WIRING DIAGRAM


E109735E01


INSPECTION PROCEDURE

NOTICE:
When the distance control ECU is replaced with a new one, initialization must be performed (for LHD, Click here; for RHD, Click here).

1.INSPECT STEERING PAD SWITCH CABLE

E107600E02

  1. Remove the steering pad switch cable.

  1. Measure the resistance of the connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 (DIST) - 1 (DIST)
    		Below 1 Ω
    7 (ECC) - 7 (ECC)
    		Below 1 Ω



NG
REPLACE STEERING PAD SWITCH CABLE
OK


2.INSPECT STEERING PAD SWITCH RH

E107599E02

  1. Connect the steering pad switch cable to the steering pad switch RH.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 (DIST) - 7 (ECC)
    		Distance control switch ON
    		Below 2.5 Ω
    1 (DIST) - 7 (ECC)
    		Distance control switch OFF
    		10 kΩ or higher



NG
REPAIR OR REPLACE STEERING PAD SWITCH RH
OK


3.INSPECT STEERING PAD SWITCH LH

E109733E01

  1. Connect the steering pad switch RH and steering pad switch cable to the steering pad switch LH.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A-4 (DIST) - A-6 (ECC)
    		Distance control switch ON
    		Below 2.5 Ω
    A-4 (DIST) - A-6 (ECC)
    		Distance control switch OFF
    		10 kΩ or higher



NG
REPAIR OR REPLACE STEERING PAD SWITCH LH
OK


4.INSPECT SRIRAL CABLE


    E106780E05

  1. Disconnect the A and L20 spiral cable connectors.

  1. Measure the resistance of the connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A-4 - L20-11
    		Below 1 Ω
    A-6 - L20-2
    		Below 1 Ω



NG
REPLACE SPIRAL CABLE
OK


5.CHECK WIRE HARNESS (DISTANCE CONTROL ECU - SPIRAL CABLE)
E109734E03

  1. Disconnect the L13 distance control ECU connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    L20-11 (DIST) - L13-16 (MODE)
    		Below 1 Ω
    L13-16 (MODE) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK


6.CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)


    E107092E05

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    L20-2 (ECC) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK


7.INSPECT DISTANCE CONTROL ECU
I034909E13

  1. Turn the engine switch on (IG).

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    L13-16 (MODE) - L13-12 (GND)
    		Distance control switch ON
    		0 to 2 V
    L13-16 (MODE) - L13-12 (GND)
    		Distance control switch OFF
    		9 to 16 V



NG
REPLACE DISTANCE CONTROL ECU
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE