CRUISE CONTROL SYSTEM > Cruise Control Switch Circuit

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DESCRIPTION

The cruise control main switch operates 7 functions: SET, COAST, TAP-DOWN, RESUME, ACCEL, TAP-UP, and CANCEL. The SET, TAP-DOWN and COAST functions, and the 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 each arrow direction and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the resistance value that has been changed by the switch operation to control SET, COAST, RESUME, ACCEL and CANCEL.

WIRING DIAGRAM


E109900E04


INSPECTION PROCEDURE

1.READ VALUE OF INTELLIGENT TESTER


    E107091E02

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch on, and turn the intelligent tester main switch on.

  1. Check the DATA LIST for proper functioning of the cruise control main switch.

    Hybrid Vehicle Control ECU (Cruise Control): 
    Item
    		Measurement Item / Display (Range)
    		Normal Condition
    		Diagnostic Note
    MAIN SW (MAIN)
    		Main switch signal (Main CPU) / ON or OFF
    		ON: Main switch ON (Pushed on)
    OFF: Main switch OFF (Pushed off)
    		-
    CANCEL SW
    		CANCEL switch signal / ON or OFF
    		ON: CANCEL switch ON
    OFF: CANCEL switch OFF
    		-
    SET/COAST SW
    		-/SET switch signal / ON or OFF
    		ON: -/SET switch ON
    OFF: -/SET switch OFF
    		-
    RES/ACC SW
    		+/RES switch signal / ON or OFF
    		ON: +/RES switch ON
    OFF: +/RES switch OFF
    		-

    OK:
    When cruise control main switch operation is performed the results will be same as above.

    Result: 
    Result
    		Proceed to
    OK
    		A
    NG (All items are defective.)
    		B
    NG (One to four items are defective.)
    		C



A
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C
REPLACE CRUISE CONTROL MAIN SWITCH
B


2.INSPECT CRUISE CONTROL MAIN SWITCH

  1. Disconnect the cruise control main switch connector.



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


    E106137E02


Standard resistance:

Tester Connection
Switch Condition
Specified Condition
1 - 3
Neutral
10 kΩ or higher
1 - 3
+/RES
235 to 245 Ω
1 - 3
-/SET
620 to 640 Ω
1 - 3
CANCEL
1,510 to 1,570 Ω
1 - 3
Main Switch OFF
10 kΩ or higher
1 - 3
Main Switch ON
Below 1 Ω



NG
REPLACE CRUISE CONTROL MAIN SWITCH
OK


3.INSPECT SPIRAL CABLE


    E106780E06

  1. Disconnect the spiral cable connectors.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    A-3 - C13-1
    		Below 1 Ω
    A-4 - C13-2
    		Below 1 Ω



NG
REPLACE SPIRAL CABLE
OK


4.CHECK WIRE HARNESS (SPIRAL CABLE - HYBRID VEHICLE CONTROL ECU AND BODY GROUND)


    E109918E03

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C13-1 - H29-26 (CCS)
    		Always
    		Below 1 Ω
    H29-26 (CCS) - Body ground
    		Always
    		10 kΩ or higher
    C13-1 - Body ground
    		Always
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE