Toyota Venza manuals

Toyota Venza: 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.

(c) Turn the Techstream 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


A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


C

REPLACE CRUISE CONTROL MAIN SWITCH


B

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

(c) Reinstall the cruise control main switch (See page ).



NG

REPLACE CRUISE CONTROL MAIN SWITCH


OK

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.


(c) Disconnect the spiral cable sub-assembly 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

*1

Front view of wire harness connector

(to Spiral Cable Sub-assembly)

*2

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 ).



NG

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


OK

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)

(c) Reinstall the spiral cable sub-assembly.


NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY


OK

5.

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

(a) Disconnect the ECM connector.

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

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

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.


NG

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


OK

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

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


A

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


B

REPLACE ECM


C

REPLACE ECM

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