Cruise Control Switch Circuit: Procedure

1. Connect the Techstream to the DLC3.
   Fig 1: Inspecting + (ACCEL) Function.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Select the following menu items: Powertrain / Radar Cruise / Data List.
5. Check the Data List to confirm proper functioning of the cruise control switch.
   TEXT IN ILLUSTRATION
   
   

   *a	ON-OFF
   *b	-/SET
   *c	+/RES

   RADAR CRUISE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Cruise Control Main Switch	Cruise control switch signal / ON or OFF	ON: Cruise control switch (ON-OFF button) pushed OFF: Cruise control switch (ON-OFF button) released	-
   SET/COAST Switch	-/SET switch signal / ON or OFF	ON:-/SET switch on OFF:-/SET switch off	-
   RES/ACC Switch	+/RES switch signal / ON or OFF	ON: +/RES switch on OFF: +/RES switch off	-

   OK

   When the cruise control switch is operated, the display changes as shown above.

NG → See step   2 

OK → See step   7 

1. Remove the cruise control switch. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Inspecting Cruise Control Main Switch With Connector End View

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Cruise control switch (ON-OFF button)	-	-
   *a	Component without harness connected (Cruise Control Switch)	*b	ON-OFF
   *c	+/RES	*d	-/SET
   *e	MODE	*f	CANCEL

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2 1 - 3	Cruise control switch (ON-OFF button) released	1 MΩ or higher
   1 - 3	Cruise control switch (ON-OFF button) pushed	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

NG → See step   8 

OK: Go to next step 

1. Disconnect the with sensor cable sub-assembly connector.
   Fig 3: Checking Cruise Control Switch Wire

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the connector from the cruise control switch.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

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

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   z10-4 - Body ground	Always	10 kΩ or higher
   z10-1 - Body ground	Always	10 kΩ or higher
   z10-3 - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE (SPIRAL CABLE SUB-ASSEMBLY - CRUISE CONTROL SWITCH) 

OK: Go to next step 

1. Remove the spiral with sensor cable sub-assembly. Refer to REMOVAL .
   Fig 4: Inspecting Spiral With Sensor Cable Sub-Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z10-3 - L52-1 (CCS)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   z10-4 - L52-2 (ECC)	Center	Below 3 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right

3. After setting the spiral cable with sensor assembly to the center position, rotate the spiral cable with sensor assembly 2.5 times clockwise. Then while rotating the spiral cable with sensor assembly 5 times counterclockwise, 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)	Always	Below 3 Ω
   z10-3 - L52-1 (CCS)	Always	Below 3 Ω
   z10-4 - L52-2 (ECC)	Always	Below 3 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	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.

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

NG → See step   9 

OK: Go to next step 

1. Disconnect the driving support ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L52-1 (CCS) - L151-23 (CCS)	Always	Below 1 Ω
   L52-7 (R/N) - L151-10 (CCHG)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   L52-1 (CCS) or L151-23 (CCS) - Body ground	Always	10 kΩ or higher
   L52-7 (R/N) or L151-10 (CCHG) - Body ground	Always	10 kΩ or higher

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

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 5: Checking L52 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance (Check for Open)

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

   TEXT IN ILLUSTRATION
   
   

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

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

OK → See step   7