Cruise Control Switch Circuit [11/2015 - 07/2020]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Radar Cruise 1 / Data List.
5. Read the Data List according to the display on the Techstream.

   Powertrain > Cruise Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Cancel Switch	CANCEL switch status	ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
   -SET Switch	-SET switch status	ON or OFF	ON: -SET switch on OFF: -SET switch off	-
   +RES Switch	+RES switch status	ON or OFF	ON: +RES switch on OFF: +RES switch off	-
   Cruise Main Switch Operation Condition	Cruise control main switch (ON/OFF button) status	ON or OFF	ON: Cruise control main switch (ON/OFF button) pushed OFF: Cruise control main switch (ON/OFF button) not pushed	-

   Powertrain > Cruise Control > Data List 

   Tester Display
   Cancel Switch
   -SET Switch
   +RES Switch
   Cruise Main Switch Operation Condition

   OK

   The Data List items shown in the table change according to the operation of the cruise control main switch.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2015 - 12/2018]  , or refer to  PROBLEM SYMPTOMS TABLE [12/2018 - 07/2020] 

Result: 

NG 

See step  2

1. Remove the cruise control main switch.

   Refer to REMOVAL [11/2015 - 12/2018] , or refer to REMOVAL [12/2018 - 07/2020]

2. Inspect the cruise control main switch.

   Refer to INSPECTION [11/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE CRUISE CONTROL MAIN SWITCH. Refer to  COMPONENTS [11/2015 - ] 

Result: 

OK 

See step  3

1. Remove the cruise control switch wire.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Refer to REMOVAL [11/2015 - 12/2018] , or refer to REMOVAL [12/2018 - 07/2020]

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

   Standard Resistance

   (z4)

   (z4)

   Tester Connection	Condition	Specified Condition
   z4-3 (CCS) - A-3 (CCS)	Always	Below 1 Ω
   z4-4 (ECC) - A-1 (ECC)	Always	Below 1 Ω
   z4-3 (CCS) or A-3 (CCS) - Body ground	Always	10 kΩ or higher
   z4-4 (ECC) or A-1 (ECC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE CRUISE CONTROL SWITCH WIRE. Refer to  COMPONENTS [11/2015 - 12/2018]  , or refer to  COMPONENTS [12/2018 - ] 

Result: 

OK 

See step  4

1. Remove the spiral cable with sensor sub-assembly.

   Refer to REMOVAL [11/2015 - 12/2018] , or refer to REMOVAL [12/2018 - 07/2020]

2. Inspect the spiral cable with sensor sub-assembly.

   Refer to INSPECTION [11/2015 - 12/2018] , or refer to INSPECTION [12/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY. Refer to  COMPONENTS [11/2015 - 12/2018]  , or refer to  COMPONENTS [12/2018 - ] 

Result: 

OK 

See step  5

1. Disconnect the F21 spiral cable with sensor sub-assembly connector.
2. Disconnect the F3 hybrid vehicle control ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   (F21, F3)

   (F21)

   (F3)

   Tester Connection	Condition	Specified Condition
   F21-1 (CCS) - F3-14 (CCS)	Always	Below 1 Ω
   F21-2 (ECC) - Body ground	Always	Below 1 Ω
   F21-1 (CCS) or F3-14 (CCS) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  COMPONENTS [11/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR