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CRUISE CONTROL SYSTEM > Cruise Control Switch Circuit

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DESCRIPTION

The cruise control main switch operates 7 functions: SET, -, TAP-DOWN, RES, +, TAP-UP, and CANCEL. The SET, TAP-DOWN, and - functions, and the RES, TAP-UP, and + functions are operated with the same switch. The cruise control main 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 point of the cruise control main switch is turned on with the switch operation. Then the power management control ECU reads the voltage value that has been changed by the switch operation to control SET, -, RES, +, and CANCEL.

WIRING DIAGRAM


E183706E05


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER


    E107091E16

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Powertrain / Cruise Control / Data List.

  1. Check the Data List for proper functioning of the cruise control main switch.

    Cruise Control (Power Management Control ECU) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Main SW M-CPU
    		Cruise control switch (Main CPU)/ON or OFF
    		ON: Cruise main switch on
    OFF: Cruise main switch off
    		-
    Cancel Switch
    		CANCEL switch signal/ON or OFF
    		ON: CANCEL switch on
    OFF: CANCEL switch off
    		-
    SET/COAST Switch
    		- SET switch signal/ON or OFF
    		ON: - SET switch on
    OFF: - SET switch off
    		-
    RES/ACC Switch
    		+ RES switch signal/ON or OFF
    		ON: + RES switch on
    OFF: + RES switch off
    		-
    Text in Illustration 
    *1
    		ON/OFF
    *2
    		- SET
    *3
    		+ RES
    *4
    		CANCEL

    OK:
    When the cruise control main switch is operated, the display changes as shown above.
    Result 
    Result
    		Proceed to
    OK
    		A
    NG (All items are defective)
    		B
    NG (1 to 3 items are defective)
    		C



B
Go to step 2

C
REPLACE CRUISE CONTROL MAIN SWITCH (Click here)
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)  

2.INSPECT CRUISE CONTROL MAIN SWITCH


  1. Remove the cruise control main switch (Click here).


    E144930E12

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


Standard Resistance:

Tester Connection
Switch Condition
Specified Condition
1 - 3
Main switch off*1
1 MΩ or higher
Main switch on
Below 2.5 Ω
+ RES
235 to 245 Ω
- SET
617 to 643 Ω
CANCEL
1509 to 1571 Ω

*1: The cruise control main switch lever is in the neutral position..

Text in Illustration 
*1
Component without harness connected
(Cruise Control Main Switch)
*2
Main Switch
*3
Lever
*4
ON-OFF
*5
- SET
*6
+ RES
*7
CANCEL
-
-

  1. Reinstall the cruise control main switch (Click here).



NG
REPLACE CRUISE CONTROL MAIN SWITCH (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSEMBLY)
E103330E71

  1. Disconnect the connector from the spiral with sensor cable sub-assembly.

  1. Disconnect the connector from the cruise control main switch.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    Cruise control main switch side connector terminal 3 - z10-3
    		Always
    		Below 1 Ω
    Cruise control main switch side connector terminal 1 - z10-4
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Spiral with Sensor Cable Sub-assembly)
    *2
    		Front view of wire harness connector
    (to Cruise Control Main Switch)

  1. Reconnect the connector to the cruise control main switch.

  1. Reconnect the connector to the spiral with sensor cable sub-assembly.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE SUB-ASSEMBLY)
OK


4.CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY
E144333E65

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 brackets.

  1. Remove the spiral with sensor cable sub-assembly (Click here).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z10-3 - L52-1 (CCS)
    		The spiral with sensor cable sub-assembly is centered
    		Below 1 Ω
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
    z10-4 - L52-2 (ECC)
    		The spiral with sensor cable sub-assembly is centered
    		Below 1 Ω
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
    The spiral with sensor cable sub-assembly position is 2.5 rotations to the right

    Text in Illustration 
    *1
    		Component without harness connected
    (Spiral with Sensor Cable Sub-assembly)

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

  1. Reinstall the spiral with sensor cable sub-assembly (Click here).



NG
REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

  1. Disconnect the power management control ECU connector.

  1. Disconnect the spiral with sensor cable sub-assembly connector.



    E183709E02

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    L52-1 (CCS) - L6-22 (CCS)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    L52-1 (CCS) or L6-22 (CCS) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Spiral with Sensor Cable Sub-assembly)
    *2
    		Front view of wire harness connector
    (to Power Management Control ECU)

  1. Reconnect the spiral with sensor cable sub-assembly connector.

  1. Reconnect the power management control ECU connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - POWER MANAGEMENT CONTROL ECU)
OK


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


    E171248E08

  1. Disconnect the spiral with sensor cable sub-assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L52-2 (ECC) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Spiral with Sensor Cable Sub-assembly)

  1. Reconnect the spiral with sensor cable sub-assembly connector.



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

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)