Inspection Procedure

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

   Standard: 

   MIL lights up 

NG: SYSTEM OK 

NG: GO TO NEXT STEP 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position and turn the intelligent tester on.
3. Check the communication between the intelligent tester and ECM.

   Result 

   RESULT REFERENCE
   
   

   Condition	Proceed to
   Communication Is possible	A
   Communication Is not possible	B

A: GO TO  MIL CIRCUIT  

B: GO TO NEXT STEP 

1. Turn the ignition switch to the ON position.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   ECM TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E8-18(VC) - E8-3(E1)	Voltage is not 5 V

   Fig 1: Inspecting ECM (VC Voltage)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the T1 throttle body connector.
2. Turn the ignition switch to the ON position.
3. Check the MIL.

   Result 

   MIL RESULT REFERENCE
   
   

   Condition	Proceed to
   MIL illuminates	A
   MIL does not illuminate	B

A: REPLACE THROTTLE BODY 

B: GO TO NEXT STEP 

1. Disconnect the T1 throttle body connector.
2. Turn the ignition switch to the ON position.
3. Check the MIL

   Result 

   MIL RESULT REFERENCE
   
   

   Condition	Proceed to
   MIL Illuminates	A
   MIL does not illuminate	B

A: REPLACE CANISTER 

B: GO TO NEXT STEP 

1. Disconnect the T1 throttle body connector.
2. Disconnect the L1 canister pump module connector.
3. Disconnect the E8 ECM connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   WIRE HARNESS TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   E8-18 (VC) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE ECM