Cruise Control Switch Circuit
CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Cruise Control Switch Circuit
- Cruise Control Switch Circuit
DESCRIPTION
The cruise control main switch operates 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 main switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. The ECM then reads the voltage value that has been changed by the switch operation to control MODE, SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL. The dynamic radar cruise control system has two cruise control modes: the constant speed control mode and vehicle-to-vehicle distance control mode.
* 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 that for a conventional cruise control system.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When the distance control ECU and/or ECM are replaced with a new one, initialization must be performed Installation.
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Radar Cruise / Data List.
(e) Check the Data List for proper functioning of the cruise control main switch.
Radar Cruise
OK:
The display changes as shown above according to switch operation.
Result:
C -- REPLACE CRUISE CONTROL MAIN SWITCH Removal
B -- INSPECT CRUISE CONTROL MAIN SWITCH
A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Dynamic Radar Cruise Control System
2. INSPECT CRUISE CONTROL MAIN SWITCH
(a) Disconnect the cruise control main switch connector.
Text in Illustration
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE CRUISE CONTROL MAIN SWITCH Removal
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE)
(a) Disconnect the spiral cable connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Reconnect the spiral cable connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE)
OK -- Continue to next step.
4. INSPECT SPIRAL CABLE
NOTICE:
The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may cause airbag deployment. Be sure to read the page shown in the brackets.
HINT
* Removal Removal
* Installation Installation
(a) Remove the spiral cable.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
HINT
The spiral cable makes a maximum of approximately 5 rotations.
(c) Reinstall the spiral cable.
NG -- REPLACE SPIRAL CABLE Removal
OK -- Continue to next step.
5. CHECK WIRE HARNESS (SPIRAL CABLE - ECM)
(a) Disconnect the spiral cable connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Reconnect the spiral cable connector.
(e) Reconnect the ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE)
OK -- Continue to next step.
6. CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)
(a) Disconnect the spiral cable connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Reconnect the spiral cable connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE)
OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Dynamic Radar Cruise Control System