Inspection Procedure

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Powertrain/Engine/Trouble Codes.
   5. Read the DTCs.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC P2004 or P2006 is output	A
      P2004 or P2006 and other DTCs are output	B

      HINT:

      If any DTCs other than P2004 or P2006 are output, troubleshoot those DTCs first.

      B:  GO TO DTC CHART

      A: Go to next step 

2. INSPECT INTAKE AIR CONTROL VALVE ACTUATOR (FOR TUMBLE CONTROL VALVE) 
   1. Inspect the intake air control valve actuator (See INSPECTION ).

      NG: REPLACE INTAKE AIR CONTROL VALVE ACTUATOR (FOR TUMBLE CONTROL VALVE)  (See INTAKE AIR CONTROL VALVE ACTUATOR (FOR TCV) )

      OK: Go to next step 

3. INSPECT INTAKE MANIFOLD (TUMBLE CONTROL VALVE OPERATION) 
   1. Inspect the intake manifold (See ON-VEHICLE INSPECTION ).

      NG: REPLACE INTAKE MANIFOLD  (See REMOVAL )

      OK: Go to next step 

4. CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR CONTROL ACTUATOR) 
   1. Disconnect the ECM connector.
   2. Disconnect the intake air control valve actuator connector.
   3. Measure the resistance according to the value (s) in the table below.

      Standard Resistance (Check for Open) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      B51-34 (IA1-) - d4-4 (M-)	Always	Below 1 Ω
      B51-33 (IA1+) - d4-5 (M+)	Always	Below 1 Ω

      Standard Resistance (Check for Short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      B51-34 (IA1-) or d4-4 (M-) - Body ground	Always	10 kΩ or higher
      B51-33 (IA1+) or d4-5 (M+) - body ground	Always	10 kΩ or higher

   4. Reconnect the ECM connector.
   5. Reconnect the intake air control valve actuator connector.

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 1: Identifying ECM And Intake Air Control Valve Actuator Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Clear the DTCs.
   5. Turn the ignition switch off.
   6. Turn the ignition switch to ON and turn the Techstream on.
   7. Drive the vehicle in accordance with the driving pattern described in the CONFIRMATION DRIVING PATTERN .
   8. Enter the following menus: Powertrain/Engine/Trouble Codes/Pending.
   9. Read the pending DTCs.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC P2004 or P2006 is output	A
      DTC is not output	B

      B: CHECK FOR INTERMITTENT PROBLEMS  (See CHECK FOR INTERMITTENT PROBLEMS )

      A: REPLACE ECM  (See REMOVAL )