Inspection Procedure

NOTE: When the distance control ECU and/or ECM are replaced with a new one, initialization must be performed (See INSTALLATION ).

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 1: Checking Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECM (Cruise control):

DATA LIST

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
MAIN SW (MAIN)	Main switch signal (Main CPU) / ON or OFF	ON: Main switch ON OFF: Main switch 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

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 (See REMOVAL )

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

TESTER CONNECTION SPECIFIED CONDITION

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
	- (COAST)/SET	567 to 693 Ω
	CANCEL	1,386 to 1,694 Ω
	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 (See REMOVAL )

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 cause airbag deployment. Be sure to read the page shown in the brackets.

HINT:

(See REMOVAL )
(See INSTALLATION )

Remove the spiral cable.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Condition	Spiral Cable Position	Specified Condition
e1-1 - E30-7	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
e1-3 - E30-1	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
e1-4-E30-2	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.

Fig 3: Checking Spiral Cable

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPIRAL CABLE (See REMOVAL )

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

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E30-1 (CCS) - A10-40 (CCS)	Always	Below 1Ω
E30-7 (R/N) - A10-37 (CCHG)	Always	Below 1 1Ω
E30-1 (CCS) - Body ground	Always	10 kΩ or higher
E30-7 (R/N) - Body ground	Always	10 kΩ or higher

Fig 4: Identifying E30 And A10 Connectors Terminals

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

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E30-2 - Body ground	Always	Below 1Ω

Fig 5: Identifying E30 Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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