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

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(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.

Text in Illustration

Radar Cruise (ECM)

OK:

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

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) Remove the cruise control main switch Removal.

Text in Illustration

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

Standard Resistance:

*1: The lever is in the neutral position.

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

3. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - CRUISE CONTROL MAIN SWITCH)

(a) Disconnect the cruise control switch wire connector from the spiral cable and cruise control main switch.

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

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT SPIRAL CABLE SUB-ASSEMBLY

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.

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

(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) Install the spiral cable sub-assembly Installation.

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

5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE - ECM, BODY GROUND)

(a) Disconnect the ECM connectors.

(b) 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