Inspection Procedure

READ VALUE USING TECHSTREAM

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

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

Fig 1: Checking Cruise Control Main Switch Function

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECM (Radar Cruise):

DATA LIST

Tester 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: - (COAST)/SET switch ON OFF: - (COAST)/SET switch OFF	-
RES/ACC Switch	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 CHART

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

Disconnect the cruise control main switch connector.

Fig 2: Inspecting Cruise Control Main Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

RESISTANCE SPECIFICATION CHART

Tester Connection	Switch Condition	Specified Condition
A-1 (ECC) - A-2 (R/N), A-1 (ECC) - A-3 (CCS)	Neutral	10 kΩ or higher
A-1 (ECC) - A-3 (CCS)	+ (ACCEL)/RES (RESUME)	216 to 264 Ω
A-1 (ECC) - A-3 (CCS)	- (COAST)/SET	567 to 693 Ω
A-1 (ECC) - A-3 (CCS)	CANCEL	1,386 to 1,694 Ω
A-1 (ECC) - A-3 (CCS)	Main Switch off	10 kΩ or higher
A-1 (ECC) - A-3 (CCS)	Main Switch on	Below 1 Ω
A-1 (ECC) - A-2 (R/N)	Main Switch on and MODE Switch on	Below 1 Ω

NG: REPLACE CRUISE CONTROL MAIN SWITCH

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 read the article 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

RESISTANCE SPECIFICATION CHART

Tester Condition	Spiral Cable Position	Specified Condition
m1-1 - J24-7	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotation to the right
m1-3 - J24-1	Center	Below 1 Ω
	2.5 rotation to the left
	2.5 rotation to the right
m1-4 - J24-2	Center	Below 1 Ω
	2.5 rotation to the left
	2.5 rotation to the right

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Fig 3: Identifying Cruise Control Main Switch Connector m1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE

OK: Go to Next Step

CHECK WIRE HARNESS (SPIRAL CABLE - ECM)

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

Standard resistance

RESISTANCE SPECIFICATION CHART

Tester Connection	Condition	Specified Condition
J24-1 - A6-31 (CCS)	Always	Below 1 Ω
J24-7 - A5-20 (CCHG)	Always	Below 1 Ω
J24-1 - Body ground	Always	10 kΩ or higher
J24-7 - Body ground	Always	10 kΩ or higher

Fig 4: Identifying Spiral Cable Connector Terminal J24 And ECM Connector Terminal A6, A5

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

CHECK WIRE HARNESS (SPIRAL CABLE - BODY GROUND)

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

Standard resistance

RESISTANCE SPECIFICATION CHART

Tester Connection	Condition	Specified Condition
J24-2 - Body ground	Always	Below 1 Ω

Fig 5: Identifying Spiral Cable Connector Terminal J24

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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