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

WARNING: This page is about a different variant/trim than selected.

CHECK VALVE TIMING (See REPLACEMENT )
1. Check for loose or jumped tooth of timing chain.
  OK: The matchmarks of the crankshaft pulley and camshaft pulley are alined.
1. NG: ADJUST VALVE TIMING (See REPLACEMENT )
2. OK: GO TO NEXT STEP.

INSPECT OPERATION OF OCV

Start the engine.

Check the engine speed with (1) and (2).

Disconnect the C2 OCV connector.

Apply battery positive voltage between the terminals of the OCV.

Fig 1: Identifying C2 OCV Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result:

ENGINE SPEED CHECKING

Proceed to	Check (1)	Check (2)
A	Normal engine speed	Rough idle or engine stall
B	Conditions other than A	Conditions other than A

B: Go to step 4
A: GO TO NEXT STEP.

CHECK IF DTC OUTPUTS REOCCUR
1. Erase the DTC(s) using one of the following methods: 1) use the hand-held tester, 2) disconnect the battery cable for more than 60 seconds, or 3) remove the EFI NO. 1 and ETCS fuses for more than 60 seconds.
  HINT:
  
  After disconnecting the battery cable, perform the "INITIALIZE" procedure (See INITIALIZATION ).
2. Start and warm up the engine.
3. Drive the vehicle for 10 minutes or more.
4. Read output DTC using the hand-held tester.
OK: No DTC is output.
1. OK: VVT SYSTEM OK*
  HINT:
  
  *: DTCs P0011 and P0012 are output when a foreign object in the engine oil enters the system. These codes will stay even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.
2. NG: GO TO NEXT STEP.

CHECK ECM (OCV SIGNAL)

During idling, check the waveform of the ECM connector using an oscilloscope.

Fig 2: Identifying E9 ECM Terminals & OCV Signal Waveform

Standard:

TESTER CONNECTION AND CONDITION SPECIFICATIONS

Tester Connection	Specified Condition
E9-16 (OC1+) - E9-15 (OC1-)	Correct waveform is as shown

NG: REPLACE ECM (See REPLACEMENT )
OK: GO TO NEXT STEP.

CHECK OIL CONTROL VALVE FILTER
OK: The filter is not clogged.
1. NG: REPLACE OIL CONTROL VALVE FILTER
2. OK: GO TO NEXT STEP.
CHECK CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV) (See INSPECTION )
OK: OCV has no contamination and moves smoothly.
1. OK: Go to step 8
2. NG: Go to next step.
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSY (OCV)
1. GO TO NEXT STEP.
CHECK CAMSHAFT TIMING GEAR ASSY (See REPLACEMENT )
OK: Camshaft timing gear rotates smoothly when pressure is applied.
1. OK: Go to step 10
2. NG: GO TO NEXT STEP.
REPLACE CAMSHAFT TIMING GEAR ASSY
1. GO TO NEXT STEP.
CHECK FOR BLOCKAGE (OCV, OIL CHECK VALVE AND OIL HOLE)
OK: No blockage
1. NG: REPAIR OR REPLACE
2. OK: GO TO NEXT STEP.
CHECK IF DTC OUTPUTS REOCCUR
1. Erase the DTC(s) using one of the following methods: 1) use the hand-held tester, 2) disconnect the battery cable for more than 60 seconds, or 3) remove the EFI NO. 1 and ETCS fuses for more than 60 seconds.
  HINT:
  
  After disconnecting the battery cable, perform the "INITIALIZE" procedure (See INITIALIZATION ).
2. Start and warm up the engine.
3. Drive the vehicle for 10 minutes or more.
4. Read output DTC using the hand-held tester.
  OK: No DTC is output.
OK: VVT SYSTEM OK*

HINT:

*: DTCs P0011 and P0012 are output when a foreign object in the engine oil enters the system. These codes will stay even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.
1. NG: GO TO NEXT STEP.
2. REPLACE ECM (See REPLACEMENT )