Cruise Control Switch Circuit: Procedure

INSPECT CRUISE CONTROL MAIN SWITCH

Remove the cruise control main switch. Refer to REMOVAL .

Fig 1: Identifying Multifunction Lever

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*1	Component without harness connected (Cruise Control Main Switch)	*2	ON-OFF
*3	CANCEL	*4	-SET
*5	+RES	*6	MODE

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

Standard Resistance

Tester Connection	Switch Condition	Specified Condition
1 - 2 1 - 3	Main switch off	1 MΩ or higher
1 - 3	Main switch on	Below 2.5 Ω
1 - 2	MODE	Below 2.5 Ω
1 - 3	+ RES	235 to 245 Ω
1 - 3	- SET	617 to 643 Ω
1 - 3	CANCEL	1509 to 1571 Ω

Reinstall the cruise control main switch. Refer to INSTALLATION .

NG → See step 7

OK: Go to next step

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

Disconnect the connector from the spiral with sensor cable sub-assembly.

Fig 2: Checking Harness & Connector (Spiral Cable - Cruise Control Main Switch)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the connector from the cruise control main switch.

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
Cruise control main switch side connector terminal 1 - z10-4	Always	Below 1 Ω
Cruise control main switch side connector terminal 2 - z10-1	Always	Below 1 Ω
Cruise control main switch side connector terminal 3 - z10-3	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Spiral with Sensor Cable Sub-assembly)
*2	Front view of wire harness connector (to Cruise Control Main Switch)

Reconnect the connector to the spiral with sensor cable sub-assembly.
Reconnect the connector to the cruise control main switch.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - CRUISE CONTROL MAIN SWITCH)

OK: Go to next step

INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

NOTE:

The spiral with sensor cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral with sensor cable sub-assembly may cause airbag deployment. Be sure to read information shown in the brackets.

Remove the spiral with sensor cable sub-assembly. Refer to REMOVAL .

Fig 3: Inspecting Spiral With Sensor Cable Sub-Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
z10-1 - L52-7 (R/N)	The spiral with sensor cable sub-assembly is centered	Below 1 Ω
	The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
	The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
z10-3 - L52-1 (CCS)	The spiral with sensor cable sub-assembly is centered	Below 1 Ω
	The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
	The spiral with sensor cable sub-assembly position is 2.5 rotations to the right
z10-4 - L52-2 (ECC)	The spiral with sensor cable sub-assembly is centered	Below 1 Ω
	The spiral with sensor cable sub-assembly position is 2.5 rotations to the left
	The spiral with sensor cable sub-assembly position is 2.5 rotations to the right

TEXT IN ILLUSTRATION

*1	Component without harness connected (Spiral with Sensor Cable Sub-assembly)

HINT:

The spiral with sensor cable sub-assembly makes a maximum of approximately 5 rotations.

Install the spiral with sensor cable sub-assembly. Refer to INSTALLATION .

NG → See step 8

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU)

Disconnect the driving support ECU connector.
Disconnect the spiral with sensor cable sub-assembly connector.

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
L60-23 (CCS) - L52-1 (CCS)	Always	Below 1 Ω
L60-10 (CCHG) - L52-7 (R/N)	Always	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
L60-23 (CCS) or L52-1 (CCS) - Body ground	Always	10 kΩ or higher
L60-10 (CCHG) or L52-7 (R/N) - Body ground	Always	10 kΩ or higher

Reconnect the driving support driving support ECU connector.
Reconnect the spiral with sensor cable sub-assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU)

OK: Go to next step

CHECK HARNESS AND CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)

Disconnect the spiral with sensor cable sub-assembly connector.

Fig 4: View Of Wire Harness Connector To Spiral With Sensor Cable Sub-Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
L52-2 (ECC) - Body ground	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*1	Front view of wire harness connector (to Spiral with Sensor Cable Sub-assembly)

Reconnect the spiral with sensor cable sub-assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY - BODY GROUND)

OK → See step 6

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE CRUISE CONTROL MAIN SWITCH. Refer to REMOVAL
REPLACE SPIRAL WITH CABLE SUB-ASSEMBLY. Refer to REMOVAL