Cruise Control Switch Circuit

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Cruise Control Switch Circuit
- Cruise Control Switch Circuit

DESCRIPTION

The cruise control switch is used to turn the cruise control system on and off, as well as operate 8 functions: SET, -(COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, CANCEL, and MODE. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME), TAP-UP, and + (ACCEL) functions are operated with the same switch. The cruise control switch is an automatic return type switch which turns on only while it is being operated it in the direction of each arrow and turns off after being released. The internal contact points of the cruise control switch turn on with switch operation. The driving support ECU then reads the voltage value that has been changed by the switch operation to MODE, SET, -, RES, +, or CANCEL. The dynamic radar cruise control system has two cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.

* Vehicle-to-vehicle distance control mode is selected by default when the dynamic radar cruise control system is turned on using the cruise control switch (ON-OFF button).

* The operation of constant speed control mode is the same as that for a conventional cruise control system.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE ON TECHSTREAM

(a) Connect the Techstream to the DLC3.





(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Select the following menu items: Powertrain / Radar Cruise / Data List.

(e) Check the Data List to confirm proper functioning of the cruise control switch.

Text in Illustration





Radar Cruise





OK:

When the cruise control switch is operated, the display changes as shown above.

NG -- INSPECT CRUISE CONTROL SWITCH

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Dynamic Radar Cruise Control System

2. INSPECT CRUISE CONTROL SWITCH

(a) Remove the cruise control switch Removal.

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





Text in Illustration





Standard Resistance:





NG -- REPLACE CRUISE CONTROL SWITCH Removal
OK -- Continue to next step.

3. CHECK CRUISE CONTROL SWITCH WIRE (SPIRAL CABLE - CRUISE CONTROL SWITCH)

(a) Disconnect the with sensor cable sub-assembly connector.





(b) Disconnect the connector from the cruise control switch.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





NG -- REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE (SPIRAL CABLE SUB-ASSEMBLY - CRUISE CONTROL SWITCH)
OK -- Continue to next step.

4. 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.

(a) Remove the spiral with sensor cable sub-assembly Removal.





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

Standard Resistance (Check for Open):





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

Standard Resistance (Check for Open):





Text in Illustration





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

(d) Install the spiral with sensor cable sub-assembly Installation.

NG -- REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Removal
OK -- Continue to next step.

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

(a) Disconnect the driving support ECU assembly connector.

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

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (DRIVING SUPPORT ECU - SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY)
OK -- Continue to next step.

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

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





Standard Resistance (Check for Open):





Text in Illustration





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

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Dynamic Radar Cruise Control System