Cruise Control Switch Circuit [10/2015 - 09/2017]: Procedure

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

   Powertrain > Radar Cruise > Data List 

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

   Powertrain > Radar Cruise > Data List 

   Tester Display
   Cruise Control Main Switch
   RES/ACC Switch
   SET/COAST Switch

   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 [10/2015 - 09/2017] 

Result: 

NG 

See step  2

1. Remove the cruise control main switch.

   Refer to REMOVAL [10/2015 - 09/2017]

2. Inspect the cruise control switch.

   Refer to INSPECTION [10/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE CRUISE CONTROL MAIN SWITCH. Refer to  REMOVAL [10/2015 - 09/2017] 

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 Switch)

   Refer to REMOVAL [10/2015 - 09/2017]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z6-3 - B-3	Always	Below 1 Ω
   z6-4 - B-1	Always	Below 1 Ω
   z6-3 or B-3 - Body ground	Always	10 kΩ or higher
   z6-4 or B-1 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE CRUISE CONTROL SWITCH WIRE. Refer to  REMOVAL [10/2015 - 09/2017] 

Result: 

OK 

See step  4

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

   Refer to REMOVAL [10/2015 - 09/2017]

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

   Refer to INSPECTION [10/2015 - 09/2017]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY. Refer to  REMOVAL [10/2015 - 09/2017] 

Result: 

OK 

See step  5

1. Disconnect the K26 spiral cable with sensor sub-assembly connector.
2. Disconnect the K4 driving support ECU assembly connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K26-1 (CCS) - K4-17 (CCS)	Always	Below 1 Ω
   K26-2 (ECC) - Body ground	Always	Below 1 Ω
   K26-1 (CCS) or K4-17 (CCS) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE DRIVING SUPPORT ECU ASSEMBLY. Refer to  REMOVAL [10/2015 - 09/2017] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR