Cruise Control Switch Circuit: Procedure

Fig 1: Inspecting Cruise Control Main Switch Operation

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 / Cruise Control / Data List.
5. Check the Data List for proper functioning of the cruise control main switch.
   CRUISE CONTROL (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 switch on OFF: + (ACCEL)/RES 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   7 

A → See step   6 

1. Remove the cruise control main switch. Refer to REMOVAL .
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Measuring The Resistance of Cruise Control Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

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

3. Install the cruise control main switch. Refer to INSTALLATION .

NG → See step   7 

OK: Go to next step 

1. Disconnect the spiral cable connector.
   Fig 3: Measuring The Resistance of Cruise Control Main Switch

   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-3 (CCS) - m1-3 (CCS)	Always	Below 1 Ω
   A-1 (ECC) - m1-4 (ECC)	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
• Installation. Refer to INSTALLATION

1. Remove the spiral cable. Refer to COMPONENTS .
   Fig 4: Identifying Terminals Of 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
   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.

NG → See step   8 

OK: Go to next step 

1. Disconnect the ECM connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 5: Identifying Terminals Of Spiral Cable J24 Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J24-1 (CCS) - A6-15 (CCS)	Always	Below 1 Ω
   A6-15 (CCS) - Body ground	Always	10 kΩ or higher
   J24-2 (ECC) - Body ground	Always	Below 1 Ω

3. Reconnect the ECM connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   9