Cruise Control Switch Circuit: Procedure

READ VALUE USING TECHSTREAM

Fig 1: Identifying Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Powertrain / Cruise Control / Data List.

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

DATA LIST

Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
CCS 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/COAST switch signal/ON or OFF	ON: - SET switch on OFF: - SET switch off	-
RES/ACC Switch	RES/ACC switch signal/ON or OFF	ON: + RES switch on OFF: + RES switch off	-

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

C → REPLACE CRUISE CONTROL MAIN SWITCH

A → PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

B: Go to next step

INSPECT CRUISE CONTROL MAIN SWITCH

Remove the cruise control main switch. Refer to REMOVAL .

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

Fig 2: Inspecting Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
1 (ECC) - 3 (CCS)	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: Lever is in the neutral position

NG → REPLACE CRUISE CONTROL MAIN SWITCH

OK: Go to next step

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

Disconnect the m1 connector from the spiral cable.

Fig 3: Identifying Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

STANDARD RESISTANCE

Tester connection	Specified condition
Cruise control main switch side connector 1 (ECC) - m1-4	Below 1 Ω
Cruise control main switch side connector 3 (CCS) - m1-3	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT SPIRAL CABLE

NOTE:

The spiral cable is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable may prevent the airbag from deploying. Be sure to follow the service information.

HINT:

Removal. Refer to REMOVAL
Installation. Refer to INSTALLATION

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

STANDARD RESISTANCE

Tester Connection	Spiral Cable Position	Specified Condition
m1-3 - J24-1 (CCS)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
m1-4 - J24-2 (ECC)	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

NG → REPLACE SPIRAL CABLE

OK: Go to next step

CHECK WIRE HARNESS (SPIRAL CABLE - ECM AND BODY GROUND)

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

Fig 5: Identifying Connector Terminals

Standard resistance

Tester Connection	Condition	Specified Condition
J24-1 (CCS) - A6-31 (CCS)	Always	Below 1 Ω
A6-31 (CCS) - Body ground	Always	10 kΩ or higher
J24-2 (ECC) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → REPLACE ECM