Hand-held tester:

CHECK VALVE TIMING (CHECK FOR LOOSE AND A JUMPED TOOTH OF TIMING BELT) (See TIMING BELT (3MZ-FE) )
NG: ADJUST VALVE TIMING (See TIMING BELT (3MZ-FE) )

OK: GO TO NEXT STEP.
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

NG: Go to step 4

OK: GO TO NEXT STEP.
CHECK IF DTC OUTPUT REOCCURS
1. Clear the DTCs.
  1. Erase the codes using one of the following methods: 1) use the hand held tester, 2) disconnect the negative battery cable, or 3) remove the EFI and ETCS fuses for more than 60 seconds.
  NOTE: When disconnecting the battery cable, perform the "INITIALIZE" procedure (see PRECAUTION ).
2. Start and warm up the engine.
3. Drive the vehicle around for 10 minutes or more.
4. Read output DTC using the hand-held tester.
Standard: No DTC output.

HINT:

(*) DTC P0011, P0012, P0021 or P0022 is output when a foreign object in engine oil is caught in some part of the system. These codes will stay registered even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

OK: VVT SYSTEM OK (*)

NG: 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 ECM Terminals & Waveform
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE ECM (See ECM (3MZ-FE) )

OK: GO TO NEXT STEP.
CHECK OIL CONTROL VALVE FILTER
NG: REPLACE OIL CONTROL VALVE FILTER

OK: GO TO NEXT STEP.
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) (See INSPECTION )
OK: Go to step 8

NG: GO TO NEXT STEP.
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV)
GO: GO TO NEXT STEP.
CHECK CAMSHAFT TIMING GEAR ASSY (See CAMSHAFT (RH BANK) (3MZ-FE) or CAMSHAFT (LH BANK) (3MZ-FE) )
OK: Go to step 10

NG: GO TO NEXT STEP.
REPLACE CAMSHAFT TIMING GEAR ASSY
GO: GO TO NEXT STEP.
CHECK FOR BLOCKAGE (OCV, OIL CHECK VALVE AND OIL HOLE)
NG: REPAIR OR REPLACE

OK: GO TO NEXT STEP.
CHECK IF DTC OUTPUT REOCCURS
1. Clear the DTCs.
  1. Erase the codes using one of the following methods: 1) use the hand held tester, 2) disconnect the negative battery cable, or 3) remove the EFI and ETCS fuses for more than 60 seconds.
    NOTE: When disconnecting the battery cable, perform the "INITIALIZE" procedure (see PRECAUTION ).
2. Start and warm up the engine.
3. Drive the vehicle around for 10 minutes or more.
4. Read output DTC using the hand-held tester.
Standard: No DTC output.

HINT: DTC P0011, P0012, P0021 or P0022 is output when a foreign object in engine oil is caught in some part the system. These codes will stay registered even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

OK: VVT SYSTEM OK (*)

NG: GO TO NEXT STEP.

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