CRUISE CONTROL SYSTEM > Cruise Control Switch Circuit

for Preparation Click here


DESCRIPTION

The cruise control main switch operates 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, and CANCEL. 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 each 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 voltage value that has been changed by the switch operation to control SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL.

WIRING DIAGRAM


E222679E02


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM
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  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream 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 (ECM) 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Main SW M-CPU
    		Main switch signal (Main CPU)/ON or OFF
    		ON: Cruise control main switch pushed
    OFF: Cruise control main switch not pushed
    		-
    Cancel Switch
    		CANCEL switch signal/ON or OFF
    		ON: CANCEL switch on
    OFF: CANCEL switch off
    		-
    SET/COAST Switch
    		- (COAST)/SET switch signal/ON or OFF
    		ON: - (COAST)/SET switch on
    OFF: - (COAST)/SET switch off
    		-
    RES/ACC Switch
    		+ (ACCEL)/RES (RESUME) switch signal/ON or OFF
    		ON: + (ACCEL)/RES (RESUME) switch on
    OFF: + (ACCEL)/RES (RESUME) switch off
    		-

    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).


    E144930E11

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


Standard Resistance:

Tester Connection
Switch Condition
Specified Condition
1 (ECC) - 3 (CCS)
Main Switch off
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. Install 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)
E103330E92

  1. Disconnect the Y2 connector from the spiral cable sub-assembly.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified condition
    A-1 - Y2-4
    		Always
    		Below 1 Ω
    A-3 - Y2-3
    		Always
    		Below 1 Ω

  1. Reconnect the Y2 connector from the spiral cable sub-assembly.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK SPIRAL CABLE SUB-ASSEMBLY
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NOTICE:
The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may cause airbag deployment. Be sure to read the page shown in the brackets.

HINT:
  1. Removal (Click here)
  2. Installation (Click here)

  1. Remove the spiral 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
    Y2-3 (CCS) - E6-1 (CCS)
    		The spiral cable position is center
    		Below 1 Ω
    The spiral cable position is 2.5 rotations to the left
    The spiral cable position is 2.5 rotations to the right
    Y2-4 (ECC) - E6-2 (ECC)
    		The spiral cable position is center
    		Below 1 Ω
    The spiral cable position is 2.5 rotations to the left
    The spiral cable position is 2.5 rotations to the right

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

  1. Install the spiral cable sub-assembly.



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


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

  1. Disconnect the spiral cable sub-assembly connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E6-1 (CCS) - A50-40 (CCS)
    		Always
    		Below 1 Ω
    A50-40 (CCS) - Body ground
    		Always
    		10 kΩ or higher
    E6-2 (ECC) - Body ground
    		Always
    		Below 1 Ω

    Result:
    Result
    		Proceed to
    NG
    		A
    OK (for 2ZR-FE)
    		B
    OK (for 2AZ-FE)
    		C

  1. Reconnect the ECM connector.

  1. Reconnect the spiral cable sub-assembly connector.



B
REPLACE ECM (Click here)

C
REPLACE ECM (Click here)
A

REPAIR OR REPLACE HARNESS OR CONNECTOR