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 

B: GO TO MIL CIRCUIT  (See MIL CIRCUIT )

A: 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 does not illuminate	A
   MIL illuminates	B

4. Reconnect the throttle body connector.

B: REPLACE THROTTLE BODY  (See THROTTLE BODY )

A: 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 does not illuminate	A
   MIL illuminates	B

4. Reconnect the accelerator pedal position sensor connector.

B: REPLACE ACCELERATOR PEDAL ROD ASSEMBLY  (See ACCELERATOR PEDAL )

A: 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 does not illuminate	A
   MIL illuminates (for 2WD)	B
   MIL illuminates (for 4WD)	C

4. Reconnect the canister pump module connector.

B: REPLACE CANISTER  (See CANISTER (FOR 2WD) )

C: REPLACE CANISTER  (See CANISTER (FOR 4WD) )

Fig 1: Locating Canister Pump Module Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: 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 REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   B29-67 (VCTA) - Body ground	Always	10 kΩ or higher
   A37-57 (VCPA) - Body ground	Always	10 kΩ or higher
   A37-58 (VCP2) - Body ground	Always	10 kΩ or higher
   B29-70 (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.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM  (See ECM )