Inspection Procedure

HINT:

• If DTC P0010 is displayed, check the right bank VVT system.
• Bank 1 refers to the bank that includes cylinder No. 1.
• If DTC P0020 is displayed, check the left bank VVT system.
• Bank 2 refers to the bank that does not include cylinder No. 1.
• Read freeze frame data using Techstream. The ECM (Included in HV control ECU) 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. PERFORM ACTIVE TEST BY CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to the ON position and turn the tester ON.
   3. Put the engine in inspection mode (See CHECK MODE PROCEDURE  ).
   4. Warm up the engine.
   5. On the tester, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).
   6. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

      OK 

      TESTER OPERATION SPECIFIED CONDITION CHART
      
      

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

   OK: CHECK FOR INTERMITTENT PROBLEMS 

   NG: Go to Next Step 

2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV SIGNAL) 
   1. Disconnect the OCV connector.
   2. Measure the resistance between the terminals of the OCV.

      Standard resistance: 

      6.9 to 7.9 Ω at 20°C (68°F) 

   3. Reconnect the OCV connector.
   Fig 1: Measuring Resistance Between Terminals Of OCV
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 

   OK: Go to Next Step 

3. INSPECT HARNESS AND CONNECTOR (OCV - HV CONTROL ECU) 
   1. Disconnect the V6 or V7 OCV connector.
   2. Disconnect the H31 HV control ECU 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	Specified Condition
      OCV (V7-1) - OC1+ (H31-16)	Below 1 Ω
      OCV (V7-2) - OC1- (H31-15)	Below 1 Ω
      OCV (V6-1) - OC2+ (H31-14)	Below 1 Ω
      OCV (V6-2) - OC2- (H31-13)	Below 1 Ω

      Fig 2: Identifying Terminals Of V6 Or V7 OCV Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      TESTER CONNECTION SPECIFIED CONDITION CHART
      
      

      Tester Connection	Specified Condition
      OCV (V7-1) or OC1+ (H31-16) - Body ground	10 kΩ or higher
      OCV (V7-2) or OC1- (H31-15) - Body ground	10 kΩ or higher
      OCV (V6-1) or OC2+ (H31-14) - Body ground	10 kΩ or higher
      OCV (V6-2) or OC2- (H31-13) - Body ground	10 kΩ or higher

   4. Reconnect the OCV connector.
   5. Reconnect the HV control ECU connector.

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE HV CONTROL ECU