VC Output Circuit: Wiring Diagram

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

   OK: MIL lights up 

   OK: SYSTEM OK 

NG: Go To Next Step 

OK: Go To Next Step 

1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
2. Turn the ignition switch ON and intelligent tester ON.
3. Check the communication between the intelligent tester and ECM.

Result 

A: GO TO MIL CIRCUIT 

B: Go to next step 

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

Result: Voltage is not 5 V 

Fig 2: Measuring Voltage Of ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the T24 throttle body connector.
2. Turn the ignition switch ON.
3. Check the MIL.

Result 

A: REPLACE THROTTLE BODY 

B: Go to next step 

1. Disconnect the C39 camshaft position sensor connector.
2. Turn the ignition switch ON.
3. Check the MIL.

Result 

A: REPLACE CAMSHAFT POSITION SENSOR 

B: Go to next step 

1. Remove the spare tire.
2. Disconnect the L4 canister pump module connector.
3. Turn the ignition switch ON.
4. Check the MIL.

Fig 3: Identifying L4 Canister Pump Module Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result 

A: REPLACE CANISTER 

B: Go to next step 

1. Remove the intake manifold (REMOVAL ).
2. Disconnect the A57 pressure sensor.
3. Turn the ignition switch ON.
4. Check the MIL.

Result 

A: REPLACE AIR SWITCHING VALVE 

B: Go to next step 

1. Disconnect the T24 throttle body connector.
2. Disconnect the C39 camshaft position sensor connector.
3. Disconnect the L4 canister pump module connector.
4. Disconnect the A57 pressure sensor.
5. Disconnect the E8 ECM connector.
6. Measure the resistance of the wire harness side connector.

Standard resistance (check for short) 

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 4: Identifying C39 Camshaft Position Sensor Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM