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 → 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 not possible	A
   Communication is possible	B

B → See step   9 

A: 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 does not illuminate	A
   MIL illuminates	B

4. Reconnect the throttle body connector.

B → See step   10 

A: 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 does not illuminate	A
   MIL illuminates	B

4. Reconnect the accelerator pedal position sensor connector.

B → See step   11 

A: Go 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	Proceed to
   MIL does not illuminate	A
   MIL illuminates	B

4. Reconnect the canister pump module connector.

B → See step   12 

A: Go 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	Proceed to
   MIL does not illuminate	A
   MIL illuminates	B

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

B → See step   14 

A: Go 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	Proceed to
   MIL does not illuminate	A
   MIL illuminates	B

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

B → See step   15 

A: Go to next step 

Fig 2: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.
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 → See step   13