VC Output Circuit: Procedure

1. Check that the 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 and Techstream on.
3. Check the communication between the Techstream and ECM.

   Result

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

B → See step   8 

A: Go to next step 

Fig 1: Disconnecting E2 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch to ON.
2. Measure the voltage of the ECM connector.

   Standard Voltage

   Voltage is not 5.5 V

NEXT: Go to next step 

1. Disconnect the T26 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   9 

A: Go to next step 

1. Disconnect the C12 canister pump module 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 → REPLACE CANISTER 

A: Go to next step 

Fig 2: Disconnecting E2 ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the T26 throttle body connector.
2. Disconnect the C12 canister pump module connector.
3. Disconnect the E2 ECM connector.
4. Measure the resistance of the wire harness connector.

   Standard Resistance

   Tester Connection	Specified Condition
   E2-29 (VC) - Body ground	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7