Cruise Control System Cruise Control Switch Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

INSPECT CRUISE CONTROL MAIN SWITCH

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

CHECK SPIRAL CABLE SUB-ASSEMBLY

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the Techstream to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the Techstream on.
   

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

5. 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

1. Remove the cruise control main switch (COROLLA_ZRE142 RM000000VQ3081X.html).
   

   
   
   
   

2. 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

3. Install the cruise control main switch (COROLLA_ZRE142 RM000000VQ1080X.html).
   

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

2. 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

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

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 (COROLLA_ZRE142 RM000000UWD09PX.html)
   
2. Installation (COROLLA_ZRE142 RM000000UWA09QX.html)
   

1. Remove the spiral cable sub-assembly (COROLLA_ZRE142 RM000000UWD09PX.html).
   

2. 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.

3. Install the spiral cable sub-assembly.
   

1. Disconnect the spiral cable sub-assembly connector.
   

2. Disconnect the ECM connector.
   

3. 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

4. Reconnect the ECM connector.
   

5. Reconnect the spiral cable sub-assembly connector.