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 C17 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

B → See step   10 

A: Go to next step 

1. Disconnect the A20 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

B → See step   11 

A: Go to next step 

1. Disconnect the L28 canister pump module connector.
   Fig 1: Identifying 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

B → See step   12 

A: Go to next step 

1. Disconnect the C26 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

B → See step   14 

A: Go to next step 

1. Disconnect the C25 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

B → See step   15 

A: Go to next step 

1. Disconnect the C17 throttle body connector.
2. Disconnect the A20 accelerator pedal position sensor connector.
3. Disconnect the L28 canister pump module connector.
4. Disconnect the C26 camshaft position sensor (for intake camshaft) connector.
5. Disconnect the C25 camshaft position sensor (for exhaust camshaft) connector.
6. Disconnect the A21 and C19 ECM connectors.
7. Measure the resistance.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C19-89 (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
   C19-67 (VCPP) - Body ground	Always	10 kΩ or higher
   C19-119 (VCV1) - Body ground	Always	10 kΩ or higher
   C19-121 (VCE1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   13