Cruise Control Switch Circuit: Procedure

Fig 1: Identifying Cruise Control Main Switch Operating Direction

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	SET/COAST switch signal/ON or OFF	ON: - (COAST)/SET switch ON OFF: - (COAST)/SET switch OFF	-
   RES/ACC Switch	RES/ACC 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

C → See step   8 

B → See step   2 

A → See step   7 

1. Remove the cruise control main switch. Refer to COMPONENTS .
   Fig 2: 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	Switch Condition	Specified Condition
   1 (ECC) - 2 (R/N) 1 (ECC) - 3 (CCS)	Main Switch off*1	1 MΩ or higher
   1 (ECC) - 3 (CCS)	Main switch on	Below 2.5 Ω
   1 (ECC) - 2 (R/N)	MODE	Below 2.5 Ω
   1 (ECC) - 3 (CCS)	+ RES	235 to 245 Ω
   1 (ECC) - 3 (CCS)	- SET	617 to 643 Ω
   1 (ECC) - 3 (CCS)	CANCEL	1509 to 1571 Ω

   *1: Lever is in the neutral position

NG → See step   8 

OK: Go to next step 

1. Disconnect the m1 connector from the spiral cable.
   Fig 3: M1 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

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
   m1-1 (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.

NG → See step   9 

OK: Go to next step 

1. Disconnect the A5 and A6 connectors from the ECM.
   Fig 5: Identifying Terminals Of A5 And A6 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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6