Inspection Procedure

HINT:

• If different DTCs that are related to a different system are output simultaneously while terminal E2 is used as a ground terminal, terminal E2 may be open.
• Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE SCV) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG) and turn the tester on.
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / SCV DUTY RATIO (DC motor for SCV).
   4. Scroll the data list by the up or down button to display SCV ANG SENS D4 (SCV position sensor).
   5. Check the output voltage of SCV ANG SENS D4 while the DC motor for SCV is driven from full closed to full open (or from full open to full closed) using the intelligent tester.

      Standard: 

      The voltage output of SCV POSITION remains between 0.2 to 4.8 V while the DC motor for SCV is driven from -100 to 100 % (or from 100 to -100 %). 

      VOLTAGE SPECIFICATION
      
      

      SCV DUTY RATIO operation	SCV ANG SENS D4 (Normal)	Suspect failure area
      		IAC1 circuit short VC circuit open	VC and IAC1 circuit short-circuited IAC1 circuit open E2 circuit open	Sensor malfunction
      -100 %	0.2 to 1.0 V	Remain less than 0.2 V	Remain more than 4.8 V	Other than the voltage in the next 2 columns on the left
      100 %	3.2 to 4.8 V	Remain less than 0.2 V	Remain more than 4.8 V

   OK: Go to step  5

   NG: Go to next step 

2. CHECK HARNESS AND CONNECTOR (SCV POSITION SENSOR - ECM) 
   1. Disconnect the E3 and E6 ECM connectors.
   2. Disconnect the E56 SCV position sensor connector.
   3. Measure the resistance according to the value (s) in the table below.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      VC (E3-29) - VCX (E56-1)	Below 1 Ω
      IAC1 (E6-31) - VSX (E56-3)	Below 1 Ω
      E2 (E3-28) - E2X (E56-2)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      VC (E3-29) or VCX (E56-1) - Body ground	10 kΩ or higher
      IAC1 (E6-31) or VSX (E56-3) - Body ground	10 kΩ or higher
      E2 (E3-28) or E2X (E56-2) - Body ground	10 kΩ or higher

      Fig 1: Identifying E3 And E6 ECM Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reconnect the SCV position sensor connector.
   5. Reconnect the ECM connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

3. INSPECT ECM (VC VOLTAGE) 
   1. Disconnect the E56 SCV position sensor connector.
   2. Turn the engine switch on (IG).
   3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Specified Condition
      VC (E3-29) - E2 (E3-28)	4.5 to 5.0 V

      Fig 2: Identifying ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reconnect the SCV position sensor connector.

   NG: REPLACE ECM 

   OK: Go to next step 

4. REPLACE INTAKE MANIFOLD 
5. CHECK WHETHER DTC OUTPUT RECURS (DTC P2014, P2016 AND/OR P2017 ARE OUTPUT AGAIN) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the engine switch on (IG) and turn the tester on.
   3. Clear DTCs.
   4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES.
   5. Read DTCs.

      Result 

      DTC RESULT REFERENCE
      
      

      Display (DTC Output)	Proceed to
      P2014, P2016 and/or P2017 are output again	A
      No output	B

   B: END 

   A: REPLACE ECM