Toyota Venza: Cruise Control Switch Circuit

Toyota Venza Service Manual / Cruise Control / Cruise Control System / Cruise Control Switch Circuit

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 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 ECM reads the voltage value that has been changed by the switch operation to control SET, -, RES, +, and CANCEL.

WIRING DIAGRAM

PROCEDURE

1.	READ VALUE USING TECHSTREAM (CRUISE CONTROL MAIN SWITCH OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Cruise Control / Data List.

(e) 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: Main switch on OFF: 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	-

OK:

The display changes as shown above according to cruise control main switch operation.

Result

Result	Proceed to
OK	A
NG (All items are defective)	B
NG (1 to 3 items are defective)	C

Text in Illustration

*1	ON/OFF
*2	- SET
*3	+ RES
*4	CANCEL

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE CRUISE CONTROL MAIN SWITCH

2.	INSPECT CRUISE CONTROL MAIN SWITCH

(a) Remove the cruise control main switch (See page ).

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

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	-	-

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

REPLACE CRUISE CONTROL MAIN SWITCH

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

(a) Remove the steering pad (See page ).

(b) Disconnect the cruise control main switch connector.

(d) 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 (CCS) - z6-3 (CCS)	Always	Below 1 Ω
Cruise control main switch side connector terminal 1 (ECC) - z6-4 (ECC)	Always	Below 1 Ω

Text in Illustration

Front view of wire harness connector

(to Spiral Cable Sub-assembly)

Front view of wire harness connector

(to Cruise Control Main Switch)

(e) Reconnect the spiral cable sub-assembly connector.

(f) Reconnect the cruise control main switch connector.

(g) Reinstall the steering pad (See page ).

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

4.	INSPECT 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:

Removal (See page )

Installation (See page )

(a) Remove the spiral cable sub-assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
z6-3 (CCS) - D18-1 (CCS)	The spiral cable sub-assembly is centered	Below 1 Ω
	The spiral cable sub-assembly position is 2.5 rotations to the left
	The spiral cable sub-assembly position is 2.5 rotations to the right
z6-4 (ECC) - D18-2 (ECC)	The spiral cable sub-assembly is centered	Below 1 Ω
	The spiral cable sub-assembly position is 2.5 rotations to the left
	The spiral cable sub-assembly position is 2.5 rotations to the right

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Text in Illustration

*1	Component without harness connected (Spiral Cable Sub-assembly)

REPLACE SPIRAL CABLE SUB-ASSEMBLY

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

(a) Disconnect the ECM connector.

(b) Disconnect the spiral cable sub-assembly connector.

Standard Resistance (Check for Open):

For 1AR-FE

Tester Connection	Condition	Specified Condition
D18-1 (CCS) - A49-40 (CCS)	Always	Below 1 Ω

For 2GR-FE

Tester Connection	Condition	Specified Condition
D18-1 (CCS) - A41-45 (CCS)	Always	Below 1 Ω

Standard Resistance (Check for Short):

For 1AR-FE

Tester Connection	Condition	Specified Condition
D18-1 (CCS) or A49-40 (CCS) - Body ground	Always	10 kΩ or higher

For 2GR-FE

Tester Connection	Condition	Specified Condition
D18-1 (CCS) or A41-45 (CCS) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1	Front view of wire harness connector (to Spiral Cable Sub-assembly)
*2	Front view of wire harness connector (to ECM)
*3	for 1AR-FE
*4	for 2GR-FE

(d) Reconnect the spiral cable sub-assembly connector.

(e) Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)

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

(a) Disconnect the spiral cable sub-assembly connector.

Text in Illustration

*1	Front view of wire harness connector (to Spiral Cable Sub-assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D18-2 (ECC) - Body ground	Always	Below 1 Ω

Result	Proceed to
NG	A
OK (for 1AR-FE)	B
OK (for 2GR-FE)	C

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)

REPLACE ECM

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