Cruise Control Switch Circuit
CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Cruise Control Switch Circuit
- Cruise Control Switch Circuit
DESCRIPTION
The cruise control switch operates 8 functions: SET, COAST, TAP-DOWN, RESUME, ACCEL, TAP-UP, CANCEL and MODE. The SET, TAP-DOWN and COAST functions and the 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 pushing it in each arrow direction and turns off after releasing it. The internal contact point of the cruise control switch is turned on with the switch operation. The driving support ECU then reads the resistance value that has been changed by the switch operation to control MODE, SET, COAST, RESUME, ACCEL and CANCEL operations. The dynamic radar cruise control system has two cruise control modes: constant speed control mode and vehicle-to-vehicle distance control mode.
HINT
* The vehicle-to-vehicle distance control mode is always selected when starting up the dynamic radar cruise control system.
* The operation of the constant speed control mode is the same as the cruise control system.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When the ECM is replaced with a new one, initialization must be performed Programming and Relearning.
PROCEDURE
1. READ VALUE USING TECHSTREAM (CRUISE CONTROL SWITCH)
(a) Use the Data List to check if the cruise control switch is functioning properly Dynamic Radar Cruise Control System.
Radar Cruise
OK:
On screen, each item changes between ON and OFF according to above chart.
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.
Standard Resistance:
NG -- REPLACE CRUISE CONTROL SWITCH Removal
OK -- Continue to next step.
3. INSPECT CRUISE CONTROL SWITCH WIRE
(a) Disconnect the z7 spiral with sensor cable sub-assembly connector.
(b) Disconnect the A cruise control switch connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE CRUISE CONTROL SWITCH WIRE
OK -- Continue to next step.
4. INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
(a) Remove the spiral with sensor cable sub-assembly Installation.
(b) If there are any defects as follows, replace the spiral with sensor cable sub-assembly with a new one: scratches, cracks, dents or chips in the connector or spiral with sensor cable sub-assembly.
(c) Check the spiral with sensor cable sub-assembly.
(1) Set the spiral with sensor cable sub-assembly to the center position Removal.
(2) Rotate the spiral with sensor cable sub-assembly 2.5 times clockwise and measure the resistance according to the value(s) in the table below. Then rotate the spiral with sensor cable sub-assembly 5 times counterclockwise and measure the resistance according to the value(s) in the table below.
NOTICE:
As the spiral with sensor cable sub-assembly may break, do not rotate the spiral with sensor cable sub-assembly more than the specified amount.
Standard Resistance:
(3) Set the spiral with sensor cable sub-assembly to the center position and rotate the spiral with sensor cable sub-assembly 2.5 times clockwise. Then, while rotating the spiral with sensor cable sub-assembly 5 times counterclockwise, measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY Removal
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - ECM AND BODY GROUND)
(a) Disconnect the G28 spiral with sensor cable sub-assembly connector.
(b) Disconnect the G45 ECM connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM Removal