Cruise Control Switch Circuit: Procedure

Fig 1: View Of Cruise Control Main Switch Functions

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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.
   ECM (RADAR CRUISE):
   
   

   Techstream Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   CCS 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: - SET switch ON OFF: - SET switch OFF	-
   RES/ACC Switch	RES/ACC switch signal / ON or OFF	ON: + RES switch ON OFF: + RES switch OFF	-

   OK

   The display changes as shown above according to switch operation.

   Result

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

C → See step   7 

A → PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

B: Go to next step 

1. Disconnect the cruise control main switch connector.
   Fig 2: View Of Cruise Control Main Switch And Connector

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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	236 to 244 Ω
   1 (ECC) - 3 (CCS)	- SET	618 to 642 Ω
   1 (ECC) - 3 (CCS)	CANCEL	1510 to 1570 Ω

   *1: Lever is in the neutral position

NG → See step   8 

OK: Go to next step 

1. Disconnect the e1 connector from the spiral cable.
   Fig 3: View Of E1 Connector, Cruise Control Main Switch And Spiral Cable

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

   Standard resistance

   Tester connection	Condition	Specified Condition
   A-1 - e1-4	Always	Below 1 Ω
   A-2 - e1-1	Always	Below 1 Ω
   A-3 - e1-3	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.
   Fig 4: Identifying Cruise Control Switch Connector Terminals

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

   Standard resistance

   Tester Condition	Spiral Cable Position	Specified Condition
   e1-1 (R/N) - E30-7 (R/N)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   e1-3 (CCS) - E30-1 (CCS)	Center	Below 1 Ω
   	2.5 rotations to the left
   	2.5 rotations to the right
   e1-4 (ECC) - E30-2 (ECC)	Center	Below 1 Ω
   	2.5 rotations to the left
   	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. Measure the resistance according to the value(s) in the table below.
   Fig 5: Identifying E30 And A10 Connectors Terminals

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   Standard resistance

   Tester Connection	Condition	Specified Condition
   E30-1 (CCS) - A10-40 (CCS)	Always	Below 1 Ω
   E30-7 (R/N) - A10-37 (CCHG)	Always	Below 1 Ω
   E30-1 (CCS) - Body ground	Always	10 kΩ or higher
   E30-7 (R/N) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 6: Identifying E30 Connector Terminals

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

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E30-2 (ECC) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE