Inspection Procedure

HINT:

• If DTC P0010 is displayed, check the bank 1 VVT system circuit.
• Bank 1 refers to the bank that includes cylinder No. 1.
• If DTC P0020 is displayed, check the bank 2 VVT system circuit.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• 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.

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 and idle it.
   4. Select the following menu items on the tester: 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.

      Standard 

      ACTIVE TEST CHART
      
      

      Tester Operation	Specified Condition
      OCV OFF	Normal engine idle 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 (OCV SIGNAL) 
   1. Disconnect the C18 or C17 OCV connector.
   2. While idling, check the waveform between the terminals of the C18 or C17 OCV connector using an oscilloscope.

      OK 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      C18-1 (+) - C18-2 (-)	Correct waveform appears as shown
      C17-1 (+) - C17-2 (-)	Correct waveform appears as shown

   3. Reconnect the OCV connector.

   NG: Go to step 3 

   Fig 1: Identifying Camshaft Timing Oil Control Valve Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

3. INSPECT ECM (OCV SIGNAL) 
   1. Inspect the ECM using an oscilloscope.
   2. While idling, check the waveform between the terminals of the E7 ECM connector.

      OK 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      OC1+ (E7-17) - OC1- (E7-16)	Correct waveform appears
      OC2+ (E7-15) - OC2- (E7-14)	Correct waveform appears

   NG: REPLACE ECM  (See REMOVAL  )

   Fig 2: Identifying ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPAIR OR REPLACE HARNESS OR CONNECTOR (OCV SIGNAL OPEN CIRCUIT)