Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the ignition 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.

Fig 1: Identifying Techstream To DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ECM (Cruise Control):

ECM SPECIFICATION

Tester Display	Measurement Item/Range	Normal Condition
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	- (COAST)/SET switch signal/ON or OFF	ON: - (COAST)/SET switch on OFF: - (COAST)/SET switch off
RES/ACC Switch	+ (ACCEL)/RES switch signal/ON or OFF	ON: +- (ACCEL)/RES switch on OFF: + (ACCEL)/RES switch off

OK:

When cruise control main switch operation is performed the results will be same as 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

Disconnect the cruise control main switch connector.

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

Fig 2: Identifying Cruise Control Main Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE REFERENCE

Switch Condition	Tester Connection	Specified Condition
Neutral	A-1 - A-3	10 kΩ or higher
+/RES	A-1 - A-3	235 to 245 Ω
-/SET	A-1 - A-3	617 to 643 Ω
CANCEL	A-1 - A-3	1509 to 1571 Ω
Main Switch ON	A-1 - A-3	Below 2.5 Ω

NG: REPLACE CRUISE CONTROL MAIN SWITCH

OK: Go to next step

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

Disconnect the z1 connector from the spiral cable.

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

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
A-3 - z1-3	Always	Below 1 Ω
A-1 - z1-4	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying z1 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

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 REFERENCE

Tester Connection	Spiral Cable Position	Specified Condition
Z1-3 - D15-1	Center	Below 1 Ω
	2.5 rotations to the left
	2.5 rotations to the right
Z1-4 - D15-2	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.

NG: REPLACE SPIRAL CABLE

Fig 4: Identifying D15 Connector Terminal

OK: Go to next step

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

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

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
D15-1 (CCS) - A55-40 (CCS)	Always	Below 1 Ω
A55-40 (CCS) - Body ground	Always	10 kΩ or higher
D15-2 (ECC) - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 5: Identifying A55 And D15 Connector Terminal

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