Cruise Control Switch Circuit: Procedure

Fig 1: Identifying Cruise Control Main Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
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)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Main SW M-CPU	Main switch signal (Main CPU)/ON or OFF	ON: Cruise control main switch pushed OFF: Cruise control main switch not pushed	-
   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: Inspecting 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
   	+ (ACCEL)/RES	235 to 245 Ω
   	- (COAST)/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 Y2 connector from the spiral cable sub-assembly.
   Fig 3: Checking Harness And Connector (Cruise Control Main Switch - Spiral Cable Sub-Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A connector from the cruise control main switch.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-1 - Y2-4	Always	Below 1 Ω
   A-3 - Y2-3	Always	Below 1 Ω

4. Reconnect the Y2 and A connectors.

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 sub-assembly. Refer to REMOVAL .
   Fig 4: Checking Y2 & E10 Spiral Cable Connector Terminals

   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
   Y2-3 (CCS) - E10-1 (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
   Y2-4 (ECC) - E10-2 (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 sub-assembly makes a maximum of approximately 5 rotations.

3. Install the spiral cable sub-assembly. Refer to INSTALLATION .

NG → See step   8 

OK: Go to next step 

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E10-1 (CCS) - A37-40 (CCS)	Always	Below 1 Ω
   A37-40 (CCS) - Body ground	Always	10 kΩ or higher
   E10-2 (ECC) - Body ground	Always	Below 1 Ω

   Result

   Result	Proceed to
   NG	A
   OK (for 2ZR-FE)	B
   OK (for 2AZ-FE)	C

B → See step   9 

C → See step   10 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR