Cruise Control Switch Circuit [09/2014 - 11/2017]: 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 / Cruise Control / 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
   Main SW M-CPU	Cruise control switch signal (Main CPU)	ON or OFF	ON: Cruise control switch (ON/OFF button) pushed OFF: Cruise control switch (ON/OFF button) released	-
   Cancel Switch	CANCEL switch signal	ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
   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	-

   Powertrain > Cruise Control > Data List 

   Tester Display
   Main SW M-CPU
   Cancel Switch
   SET/COAST Switch
   RES/ACC Switch

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

Result: 

NG 

See step  2

1. Remove the cruise control switch.

   Refer to REMOVAL [09/2014 - ]

2. Inspect the cruise control switch.

   Refer to INSPECTION [09/2014 - 11/2017]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE CRUISE CONTROL SWITCH. Refer to  REMOVAL [09/2014 - ] 

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

   Refer to REMOVAL [09/2014 - 11/2017]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z5-3 (CCS) - B-3 (CCS)	Always	Below 1 Ω
   z5-4 (ECC) - B-1 (ECC)	Always	Below 1 Ω
   z5-3 (CCS) or B-3 (CCS) - Body ground	Always	10 kΩ or higher
   z5-4 (ECC) or B-1 (ECC) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE CRUISE CONTROL SWITCH WIRE. Refer to  REMOVAL [09/2014 - 11/2017] 

Result: 

OK 

See step  4

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

   Refer to REMOVAL [09/2014 - 11/2017]

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

   Refer to INSPECTION [09/2014 - 11/2017]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY. Refer to  REMOVAL [09/2014 - 11/2017] 

Result: 

OK 

See step  5

1. Disconnect the O25 spiral with sensor cable sub-assembly connector.
2. Disconnect the A78 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O25-1 (CCS) - A78-16 (CCS)	Always	Below 1 Ω
   O25-2 (ECC) - Body ground	Always	Below 1 Ω
   O25-1 (CCS) or A78-16 (CCS) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR