VC Output Circuit: Procedure

1. Check that the Malfunction Indicator Lamp (MIL) turns on when turning the ignition switch to ON.

   OK

   MIL turns on.

NG → See step   2 

OK → END 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Check the communication between the Techstream and ECM.
   RESULT
   
   

   Result	Proceed to
   Communication is possible	A
   Communication is not possible	B

A → See step   10 

B: Go to next step 

1. Disconnect the throttle body connector.
2. Turn the ignition switch to ON.
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

4. Reconnect the throttle body connector.

A → See step   11 

B: Go to next step 

1. Disconnect the accelerator pedal position sensor connector.
2. Turn the ignition switch to ON.
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

4. Reconnect the accelerator pedal position sensor connector.

A → See step   12 

B: Go to next step 

1. Disconnect the canister pump module connector.
   Fig 1: Disconnecting S3 Canister Pump Module Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch to ON.
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

4. Reconnect the canister pump module connector.

A → See step   13 

B: Go to next step 

1. Disconnect the camshaft position sensor for intake side connector.
2. Turn the ignition switch to ON.
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   14 

B: Go to next step 

1. Disconnect the camshaft position sensor for exhaust side connector.
2. Turn the ignition switch to ON.
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   15 

B: Go to next step 

1. Disconnect the intake air control valve actuator connector.
2. Turn the ignition switch to ON.
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   16 

B: Go to next step 

1. Disconnect the throttle body connector.
2. Disconnect the accelerator pedal position sensor connector.
3. Disconnect the canister pump module connector.
4. Disconnect the camshaft position sensor for intake side connector.
5. Disconnect the camshaft position sensor for exhaust side connector.
6. Disconnect the intake air control valve actuator connector.
7. Disconnect the ECM connectors.
   Fig 2: Checking Harness And Connector (VC Circuit)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (check for short)

   Tester Connection	Condition	Specified Condition
   A9-57 (VCPA) - Body ground	Always	10 kΩ or higher
   A9-58 (VCP2) - Body ground	Always	10 kΩ or higher
   B30-72 (VCIA) - Body ground	Always	10 kΩ or higher
   B30-88 (VCTA) - Body ground	Always	10 kΩ or higher
   B30-98 (VCE1) - Body ground	Always	10 kΩ or higher
   B30-99 (VCV1) - Body ground	Always	10 kΩ or higher
   B30-113 (VCPP) - Body ground	Always	10 kΩ or higher

9. Reconnect the throttle body connector.
10. Reconnect the accelerator pedal position sensor connector.
11. Reconnect the canister pump module connector.
12. Reconnect the camshaft position sensor for intake side connector.
13. Reconnect the camshaft position sensor for exhaust side connector.
14. Reconnect the intake air control valve actuator connector.
15. Reconnect the ECM connectors.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   17