Inspection Procedure

HINT:

• If DTC P0013 is displayed, check the exhaust camshaft circuit for the bank 1 VVT system.
• Bank 1 refers to the bank that includes cylinder No. 1.
• If DTC P0023 is displayed, check the exhaust camshaft circuit for the bank 2 VVT system.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• Read freeze frame data using an 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 OCV) 
   1. Connect the intelligent tester to the DLC3.
   2. Start the engine and turn the tester on.
   3. Warm up the engine.
   4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
   5. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

      OK 

      TESTER SPECIFICATION
      
      

      Tester Operation	Specified Condition
      OCV OFF	Normal engine speed
      OCV ON	Engine idles roughly or stalls (soon after OCV switched from OFF to ON)

   NG: Go to step   2 

   OK: CHECK FOR INTERMITTENT PROBLEMS 

2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 
   1. Disconnect the B7 or B5 OCV connector.
   2. Measure the resistance between the terminals of the OCV.

      Standard resistance 

      RESISTANCE REFERENCE TABLE
      
      

      Tester Connection	Condition	Specified Condition
      1 - 2	20°C (68°F)	6.9 to 7.9 Ω

      Fig 1: Measuring Resistance Between Terminals Of OCV

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Reconnect the OCV connector.

   NG: Go to step   3 

   OK: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (See  REMOVAL  ) 

3. CHECK HARNESS AND CONNECTOR (OCV - ECM) 
   1. Disconnect the B7 or B5 OCV connector.
   2. Disconnect the B12 ECM connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      RESISTANCE REFERENCE TABLE (CHECK FOR OPEN)
      
      

      Tester Connection	Specified Condition
      OE1+ (B12-16) - B7-1	Below 1 Ω
      OE1 - (B12-17) - B7-2	Below 1 Ω
      OE2+ (B12-14) - B5-1	Below 1 Ω
      OE2 - (B12-15) - B5-2	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE REFERENCE TABLE (CHECK FOR SHORT)
      
      

      Tester Connection	Specified Condition
      OE1+ (B12-16) or B7-1 - Body ground	10 kΩ or higher
      OE1- (B12-17) or B7-2 - Body ground	10 kΩ or higher
      OE2+ (B12-14) or B5-1 - Body ground	10 kΩ or higher
      OE2- (B12-15) or B5-2 - Body ground	10 kΩ or higher

      Fig 2: Identifying B12 ECM Connector Terminals, B7 & B5 OCV Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reconnect the ECM connector.
   5. Reconnect the OCV connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE ECM (See  REMOVAL  )