Inspection Procedure

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

   OK: 

   MIL lights up 

NG: Go to step 2 

OK : SYSTEM OK 

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 REFERENCE
   
   

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

A:  Go TO MIL CIRCUIT  .

B: Go to next step 

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

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

4. Reconnect the throttle body connector.

A : REPLACE THROTTLE BODY  (See REMOVAL  )

B: 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 REFERENCE
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

4. Reconnect the accelerator pedal position sensor connector.

A : REPLACE ACCELERATOR PEDAL ROD ASSEMBLY  (See REMOVAL  )

B: Go to next step 

1. Disconnect the canister pump module connector.
2. Turn the ignition switch to ON.
3. Check the MIL

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

4. Reconnect the canister pump module connector.

Fig 1: Locating Canister Pump Module Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A : REPLACE CANISTER  (See REMOVAL )

B: Go to next step 

1. Disconnect the throttle body connector.
2. Disconnect the accelerator pedal position sensor connector.
3. Disconnect the canister pump module connector.
4. Disconnect the ECM connectors.
5. Measure the resistance.

   Standard resistance (check for short) 

   RESISTANCE SPECIFICATION - CHECK FOR SHORT
   
   

   Tester Connection	Condition	Specified Condition
   B33-67 (VCTA) - Body ground	Always	10 kΩ. or higher
   A36-57 (VCPA) - Body ground	Always	10 kΩ or higher
   A936-58 (VCP2) - Body ground	Always	10 kΩ or higher
   B33-70 (VCPP) - Body ground	Always	10 kΩ or higher

6. Reconnect the throttle body connector.
7. Reconnect the accelerator pedal position sensor connector.
8. Reconnect the canister pump module connector.
9. Reconnect the ECM connectors.
Fig 2: Identifying ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE ECM  (See REMOVAL  ).