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 the intelligent tester. 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 the intelligent tester 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 INSPECTION MODE PROCEDURE ).
   4. Warm up the engine.
   5. On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
   6. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

   OK 

   TESTER OPERATION AND SPECIFIED CONDITION
   
   

   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.

   NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 

   Fig 1: Measuring Resistance Between Terminals Of OCV

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   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 AND SPECIFIED CONDITION
      
      

      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

      Standard resistance (Check for short) 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      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.
   Fig 2: Disconnecting H31 HV Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: REPLACE HV CONTROL ECU