Inspection Procedure

HINT:

• If DTC P0010 is displayed, check the bank 1 OCV.
• If DTC P0020 is displayed, check the bank 2 OCV.
• Bank 1 includes No. 1 cylinder, but bank 2 does not. No. 1 cylinder is located in the front part of the engine, opposite the transmission.
• Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 INTELLIGENT TESTER (OCV OPERATION) 
   1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
   2. Start the engine and warm it up.
   3. Turn the ignition switch ON and turn the tester ON.
   4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
   5. Operate the Oil Control Valve (OCV) and check the engine condition at idling.

   OK 

   TESTER OPERATION SPECIFIED CONDITION CHART
   
   

   Tester Operation	Specified Condition
   OCV is OFF	Normal engine speed
   OCV is 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 (OPERATION) 
   1. Disconnect the C32 or C33 OCV connector.
   2. Apply battery voltage to the terminals of the OCV.
   3. Check the engine speed.

      OK: Rough idle or engine stalled. 

   NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY 

   Fig 1: Inspecting Camshaft Timing Oil Control Valve Assembly (Operation)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

3. CHECK ECM (OCV SIGNAL) 
   1. Inspect the ECM using an oscilloscope.
   2. While idling the engine, check the waveform of the ECM connector using an oscilloscope.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

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

   NG: REPLACE ECM 

   Fig 2: Identifying OCV Signal Waveform With E7 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: GO TO Next Step 

4. CHECK HARNESS AND CONNECTOR (OCV - ECM) 
   1. Check harness and connector (see ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: CHECK FOR INTERMITTENT PROBLEMS