Inspection Procedure

READ VALUE USING TECHSTREAM

Connect a Techstream to the DLC3.
Turn the ignition switch ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Cruise Control / Data List.
According to the display on Techstream, read the "Data List".

Fig 1: Identifying Cruise Control Main Switch Function Position

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Cruise Control

ECM (CRUISE CONTROL SYSTEM)

Item	Measurement Item/Range	Normal Condition
CCS Main SW M-CPU	Main switch (Main CPU) / ON or OFF	ON: Main switch (Main CPU) is ON OFF: Main switch (Main CPU) is OFF
Cancel Switch	CANCEL switch / ON or OFF	ON: CANCEL switch is ON OFF: CANCEL switch is OFF
SET/COAST Switch	- / SET switch / ON or OFF	ON:-/SET switch is ON OFF: - / SET switch is OFF
RES/ACC Switch	+ / RES switch / ON or OFF	ON: + / RES switch is ON OFF: + / RES switch is 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 5 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.

Fig 2: Inspecting Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

CRUISE CONTROL MAIN SWITCH

Tester Connection	Switch Condition	Specified Condition
1-3	cruise control switch neutral	10 kΩ or higher
	cruise control switch ON	Below 1 Ω
	cruise control switch OFF	10 kΩ or higher
	+/RES	216 to 264 Ω
	-/SET	567 to 693 Ω
	CANCEL	1,386 to 1,694 Ω

Reinstall the cruise control main switch.

NG: REPLACE CRUISE CONTROL MAIN SWITCH

OK: GO TO NEXT STEP

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

Disconnect the spiral cable side connector.
Disconnect the cruise control main switch side connector.

Fig 3: Checking Harness And Connector (Cruise Control Main Switch - Spiral Cable)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

CRUISE CONTROL MAIN SWITCH - SPIRAL CABLE

Tester Connection	Specified Condition
Terminal 1 (ECC) main switch side - Terminal 4 (ECC) spiral cable side	Below 1 Ω
Terminal 3 (CCS) main switch side - Terminal 3 (CCS) spiral cable side	Below 1 Ω

Reconnect the spiral cable side connector.
Reconnect the cruise control main switch side connector.

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 PRECAUTION .

Remove the spiral cable.

Fig 4: Identifying Spiral Cable
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance.

Standard resistance

SPIRAL CABLE

Tester Connection	Specified Condition
Terminal 3 (CCS) main switch side - CCS (D3-1)	Below 1 Ω
Terminal 4 (ECC) main switch side - ECC (D3-2)	Below 1 Ω

HINT:

The spiral cable makes a maximum of approximately 5 rotations.

Reinstall the spiral cable.

NG: REPLACE SPIRAL CABLE

OK: GO TO NEXT STEP

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

Disconnect the A21 ECM connector.
Disconnect the D3 spiral cable (vehicle side) connector.

Fig 5: Checking Harness And Connector (Spiral Cable - ECM And Body Ground)

Measure the resistance.

Standard resistance

SPIRAL CABLE - ECM AND BODY GROUND

Tester Connection	Specified Condition
A21-40 (CCS)-D3-1 (CCS)	Below 1 Ω
A21-40 (CCS) or D3-1 (CCS) - Body ground	10 kΩ or higher
D3-2 (ECC) - Body ground	Below 1 Ω

Reconnect the ECM connector.
Reconnect the spiral cable (vehicle side) connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM