Distance Control Switch Circuit

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Distance Control Switch Circuit

Distance Control Switch Circuit

DESCRIPTION

The distance control switch sets the vehicle-to-vehicle distance control 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 CAN communication line to communicate with each ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE
CAUTION:
The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution for the SRS Service Precautions.
NOTE:
When the distance control ECU is replaced with a new one, initialization must be performed Testing and Inspection.

PROCEDURE

1. READ VALUE USING TECHSTREAM (VEHICLE DISTANCE)
(a) Using the Techstream, read the Data List.

Radar Cruise





OK:
Normal conditions listed above are displayed.
NG -- CHECK NO. 1 SWITCH WIRE
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK NO. 1 SWITCH WIRE




(a) Disconnect the z35 and z51 No. 1 switch wire connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE NO. 1 SWITCH WIRE
OK -- Continue to next step.
3. INSPECT STEERING PAD SWITCH
(a) Disconnect the z35 steering pad switch connector from the spiral cable.




(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE STEERING PAD ASSEMBLY
OK -- Continue to next step.
4. INSPECT SPIRAL CABLE




(a) Check the spiral cable and connector for scratches, cracks, dents and chips. If any defects are found, replace the spiral cable with a new one.
(b) Check the spiral cable.
(1) Set the spiral cable to the center position Removal.
(2) After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise, and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable 5 times counterclockwise, and measure the resistance according to the value(s) in the table below.
Standard Resistance:






(3) After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise. Then while rotating the spiral cable 5 times counterclockwise, measure the resistance according to the value(s) in the table below.
NOTE:
As the spiral cable may break, do not rotate the spiral cable more than the specified amount.

Standard Resistance:






NG -- REPLACE SPIRAL CABLE
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - DISTANCE CONTROL ECU AND BODY GROUND)




(a) Disconnect the E86 distance control ECU connector.
(b) Disconnect the E12 spiral cable connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE DISTANCE CONTROL ECU