Hand-held tester:

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE OCV)
1. Connect the hand-held tester to the DLC3.
2. Start the engine and warm it up.
3. Turn the ignition switch to ON and turn the hand-held tester ON.
4. Select the item: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
5. Using the hand-held tester, operate the OCV and check the engine speed.
Standard:

Fig 1: OCV Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )

NG: GO TO NEXT STEP.
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) (See INSPECTION )
NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY

OK: GO TO NEXT STEP.
INSPECT ECM (OCV SIGNAL)
1. Inspect using the oscilloscope.
2. During idling, check the waveform between the specified terminals of the E8 ECM connectors.
Standard:

Fig 2: ECM Terminals Specified Condition Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 3: Identifying OCV Signals Waveform And ECM Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ECM (See ECM (3MZ-FE) )

OK: GO TO NEXT STEP.
CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE (OCV) - ECM)
1. Disconnect the V9 or V10 OCV connector.
2. Disconnect the E8 ECM connector.
3. Check the resistance between the wire harness side connectors.
  Standard (Check for open):
  
  Fig 5: OCV Connectors Specified Condition Chart (Check For Open)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for short):
  
  Fig 6: OCV Connectors Specified Condition Chart (Check For Short)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the OCV connector.
5. Reconnect the ECM connector.
  
  Fig 7: Connecting E8 ECM Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.

CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )