VC Output Circuit: Procedure

1. Check that the Malfunction Indicator Lamp (MIL) lights up when turning the engine switch on (IG).

   OK

   MIL lights up

NG → See step   2 

OK → SYSTEM OK 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and Techstream on.
3. Check the communication between the Techstream and ECM.
   RESULT
   
   

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

A → See step   16 

B: Go to next step 

1. Disconnect the C4 throttle body connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   17 

B: Go to next step 

1. Disconnect the A31 accelerator pedal position sensor connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   18 

B: Go to next step 

1. Disconnect the M1 canister pump module connector.
   Fig 1: Identifying M1 Canister Pump Module Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   19 

B: Go to next step 

1. Disconnect the C35 air switching valve connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   20 

B: Go to next step 

1. Disconnect the C36 air switching valve connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   21 

B: Go to next step 

1. Disconnect the C28 power steering oil pressure sensor connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   22 

B: Go to next step 

1. Disconnect the C2 camshaft position sensor connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   23 

B: Go to next step 

1. Disconnect the C1 crankshaft position sensor connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   24 

B: Go to next step 

1. Disconnect the C20 VVT sensor (for Intake Side of Bank 1) connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   25 

B: Go to next step 

1. Disconnect the C22 VVT sensor (for Exhaust Side of Bank 1) connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   26 

B: Go to next step 

1. Disconnect the C21 VVT sensor (for Intake Side of Bank 2) connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   27 

B: Go to next step 

1. Disconnect the C23 VVT sensor (for Exhaust Side of Bank 2) connector.
2. Turn the engine switch on (IG).
3. Check the MIL.
   RESULT
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A → See step   28 

B: Go to next step 

1. Disconnect the C4 throttle body connector.
2. Disconnect the A31 accelerator pedal position sensor connector.
3. Disconnect the M1 canister pump module connector.
4. Disconnect the C35 air switching valve connector.
5. Disconnect the C36 air switching valve connector.
6. Disconnect the C28 power steering oil pressure sensor connector.
7. Disconnect the C2 camshaft position sensor connector.
8. Disconnect the C1 crankshaft position sensor connector.
9. Disconnect the C20 VVT sensor (for Intake Side of Bank 1) connector.
10. Disconnect the C22 VVT sensor (for Exhaust Side of Bank 1) connector.
11. Disconnect the C21 VVT sensor (for Intake Side of Bank 2) connector.
12. Disconnect the C23 VVT sensor (for Exhaust Side of Bank 2) connector.
13. Disconnect the A38 and C53 ECM connectors.
    Fig 2: Identifying A38 And C53 ECM Connector Terminals

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

    Standard Resistance

    Tester Connection	Condition	Specified Condition
    C53-80 (VCTA) - Body ground	Always	10 kΩ or higher
    A38-57 (VCPA) - Body ground	Always	10 kΩ or higher
    A38-59 (VCP2) - Body ground	Always	10 kΩ or higher
    C53-66 (VCV2) - Body ground	Always	10 kΩ or higher
    C53-67 (VCV1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   29