VC Output Circuit: Procedure

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

   OK

   MIL lights up

NG → Refer to 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 tester and ECM.

   Result

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

B → Refer to step   9 

A: Refer to next step 

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

   Result

   Result	Refer to
   MIL does not illuminate	A
   MIL illuminates	B

4. Reconnect the throttle body connector.

B → Refer to step   10 

A: Refer to next step 

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

   Result

   Result	Refer to
   MIL does not illuminate	A
   MIL illuminates	B

4. Reconnect the accelerator pedal position sensor connector.

B → Refer to step   11 

A: Refer to next step 

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

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

   Result

   Result	Refer to
   MIL does not illuminate	A
   MIL illuminates	B

4. Reconnect the canister pump module connector.

B → Refer to step   12 

A: Refer to next step 

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

   Result

   Result	Refer to
   MIL does not illuminate	A
   MIL illuminates	B

4. Reconnect the camshaft position sensor (for intake camshaft).

B → Refer to step   13 

A: Refer to next step 

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

   Result

   Result	Refer to
   MIL does not illuminate	A
   MIL illuminates	B

4. Reconnect the camshaft position sensor (for exhaust camshaft).

B → Refer to step   14 

A: Refer 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 camshaft) connector.
5. Disconnect the camshaft position sensor (for exhaust camshaft) connector.
6. Disconnect the ECM connectors.
   Fig 2: Identifying ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Measure the resistance.

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   C19-67 (VCTA) - Body ground	Always	10 kΩ or higher
   A21-57 (VCPA) - Body ground	Always	10 kΩ or higher
   A21-58 (VCP2) - Body ground	Always	10 kΩ or higher
   C19-69 (VCPP) - Body ground	Always	10 kΩ or higher
   C19-70 (VCVI) - Body ground	Always	10 kΩ or higher
   C19-117 (VC) - Body ground	Always	10 kΩ or higher

8. Reconnect the throttle body connector.
9. Reconnect the accelerator pedal position sensor connector.
10. Reconnect the canister pump module connector.
11. Reconnect the camshaft position sensor (for intake camshaft) connector.
12. Reconnect the camshaft position sensor (for exhaust camshaft) connector.
13. Reconnect the ECM connectors.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → Refer to step   15