Cruise Control Switch Circuit: Wiring Diagram

Fig 1: Identifying Cruise Control Switch Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

READ VALUE ON INTELLIGENT TESTER

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the intelligent tester main switch on.
Check the DATA LIST for proper functioning of the cruise control main switch.

Fig 2: Checking Cruise Control Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECM (Cruise control):

DATA LIST CHART

Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
MAIN SW (MAIN)	Main switch signal (Main CPU)/ ON or OFF	ON: Main switch on (Pushed on) OFF: Main switch off (Pushed off)	-
CANCEL SW	CANCEL switch signal/ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
SET/COAST SW	SET/COAST switch signal/ON or OFF	ON: - (COAST)/SET switch on OFF: - (COAST)/SET switch off	-
RES/ACC SW	RES/ACC 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 REFERENCE

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

A : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

C : REPLACE CRUISE CONTROL MAIN SWITCH

B: Go To Next Step

INSPECT CRUISE CONTROL MAIN SWITCH

Remove the CRUISE CONTROL MAIN SWITCH .
Measure the resistance according to the value(s) in the table below.

Fig 3: Inspecting Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
A-1 (CCS) - A-3 (ECC)	Neutral	10 kΩ or higher
A-1 (CCS) - A-3 (ECC)	+ (ACCEL)/RES (RESUME)	216 to 264 Ω
A-1 (CCS) - A-3 (ECC)	- (COAST)/SET	567 to 693 Ω
A-1 (CCS) - A-3 (ECC)	CANCEL	1,386 to 1,694 Ω
A-1 (CCS) - A-3 (ECC)	Main Switch off	10 kΩ or higher
A-1 (CCS) - A-3 (ECC)	Main Switch on	Below 1Ω

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION CHART

Tester connection	Specified condition
A-1 - m1-3	Below 1Ω
A-3 - m1-4	Below 1Ω

Fig 4: Checking Harness And Connector (Cruise Control Main Switch - Spiral Cable)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : Go To Next Step

CHECK 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 read the example shown in the brackets.

HINT:

Removal (See REMOVAL )
Installation (See INSTALLATION )

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION CHART

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

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Fig 5: Checking Spiral Cable

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.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION CHART

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

Fig 6: Checking Wire Harness (Spiral Cable - ECM And Body Ground)

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : REPLACE ECM