OBD II scan tool (excluding hand-held tester):

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OPERATE OCV)
1. Disconnect the V9 or V10 OCV connector.
2. Apply positive battery voltage between the terminals of the OCV.
3. Check the engine speed.
  Standard:
  
  Engine speed is rough idle or engine is stalled.
4. Reconnect the OCV connector.
Fig 1: Identifying Oil Control Valve Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 Connectors 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: ECM Connector Terminals Specified Condition Chart (Check For Open)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard (Check for short):
  
  Fig 6: ECM Connector Terminals Specified Condition Chart (Check For Short)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reconnect the OCV connector.
5. Reconnect the ECM connector.
  
  Fig 7: Reconnecting 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 )