Cruise Control Switch Circuit: Procedure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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. Check the Data List for proper functioning of the cruise control main switch.
   RADAR CRUISE (ECM)
   
   

   Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Main SW M-CPU	Main switch signal (Main CPU) / ON or OFF	ON: Main switch on OFF: Main switch off	-
   Cancel Switch	CANCEL switch signal / ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
   SET/COAST Switch	- (COAST)/SET switch signal / ON or OFF	ON: - (COAST)/SET switch on OFF: - (COAST)/SET switch off	-
   RES/ACC Switch	+ (ACCEL)/RES switch signal / ON or OFF	ON: + (ACCEL)/RES (RESUME) switch on OFF: + (ACCEL)/RES (RESUME) switch off	-

   OK

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

   Result

   Result	Proceed to
   OK	A
   NG (all items are defective)	B
   NG (1 to 3 items are defective)	C

B → See step   2 

C → See step   8 

A → See step   7 

1. Remove the cruise control main switch. Refer to REMOVAL [08/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A-1 (ECC) - A-2 (R/N) A-1 (ECC) - A-3 (CCS)	Main Switch off	1 MΩ or higher
   A-1 (ECC) - A-3 (CCS)	Main switch on	Below 2.5 Ω
   A-1 (ECC) - A-2 (R/N)	MODE	Below 2.5 Ω
   A-1 (ECC) - A-3 (CCS)	+ RES	235 to 245 Ω
   A-1 (ECC) - A-3 (CCS)	- SET	617 to 643 Ω
   A-1 (ECC) - A-3 (CCS)	CANCEL	1509 to 1571 Ω

3. Reinstall the cruise control main switch. Refer to INSTALLATION [08/2012 - ] .

NG → See step   8 

OK: Go to next step 

1. Disconnect the spiral cable connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-1 (ECC) - m1-4 (ECC)	Always	Below 1 Ω
   A-2 (R/N) - m1-1 (R/N)	Always	Below 1 Ω
   A-3 (CCS) - m1-3 (CCS)	Always	Below 1 Ω

3. Reconnect the spiral cable connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

HINT: 

• Removal. Refer to REMOVAL [08/2012 - ]
• Installation. Refer to INSTALLATION [08/2012 - ]

1. Remove the spiral cable. Refer to COMPONENTS [08/2012 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   m1-1 (R/N) - J24-7 (R/N)	The spiral cable position is center	Below 1 Ω
   	The spiral cable position is 2.5 rotations to the left
   	The spiral cable position is 2.5 rotations to the right
   m1-3 (CCS) - J24-1 (CCS)	The spiral cable position is center	Below 1 Ω
   	The spiral cable position is 2.5 rotations to the left
   	The spiral cable position is 2.5 rotations to the right
   m1-4 (ECC) - J24-2 (ECC)	The spiral cable position is center	Below 1 Ω
   	The spiral cable position is 2.5 rotations to the left
   	The spiral cable position is 2.5 rotations to the right

   HINT: 

   The spiral cable makes a maximum of approximately 5 rotations.

3. Install the spiral cable.

NG → See step   9 

OK: Go to next step 

1. Disconnect the ECM connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J24-1 (CCS) - A6-15 (CCS)	Always	Below 1 Ω
   J24-7 (R/N) - A5-17 (CCHG)	Always	Below 1 Ω
   J24-1 (CCS) - Body ground	Always	10 kΩ or higher
   J24-7 (R/N) - Body ground	Always	10 kΩ or higher
   J24-2 (ECC) - Body ground	Always	Below 1 Ω

3. Reconnect the ECM connectors.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6