Hand-held tester:

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

PERFORM ACTIVE TEST BY HAND-HELD TESTER (OPERATE OCV)

Connect the hand-held tester to the DLC3.
Start the engine and warm it up.
Turn the ignition switch ON and push the hand-held tester main switch ON.
Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1".

Check the engine speed when operating the Oil control valve (OCV) by the hand-held tester.

Standard:

ENGINE SPEED REFERENCE

Tester Operation	Specified Condition
OCV is OFF	Normal engine speed
OCV is ON	Rough idle or engine stall

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 )
1. NG: REPLACE CAMSHAFT TIMING OIL CONTROL/VALVE ASSY
2. OK: GO TO NEXT STEP.

INSPECT ECM (OCV SIGNAL)

Inspection using the oscilloscope.

During idling, check the waveform between the terminals of the E3 ECM connector.

Standard:

TERMINALS OF E3 ECM CONNECTOR WAVEFORM CONDITION

Tester Connection	Specified Condition
OCV+ (E3-15) - OCV- (E3-14)	Correct waveform is as shown

Fig 1: Inspecting ECM (OCV Signal)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE (OCV)-ECM)

Disconnect the C2 camshaft timing oil control valve connector.
Disconnect the E3 ECM connector.

Check the resistance between the wire harness side connectors.

Fig 2: Locating C2 Camshaft Timing Oil Control Valve Connector

Standard (Check for open):

CAMSHAFT TIMING OIL CONTROL VALVE CONNECTOR TERMINAL RESISTANCE (FOR OPEN)

Tester Connection	Specified Condition
Oil control valve (C2-1) - OCV+ (E3-15)	Below 1Ω
Oil control valve (C2-2) - OCV- (E3-14)	Below 1Ω

Standard (Check for short):

CAMSHAFT TIMING OIL CONTROL VALVE CONNECTOR TERMINAL RESISTANCE (FOR SHORT)

Tester Connection	Specified Condition
Oil control valve (C2-1) or OCV+ (E3-15) - Body ground	10 kΩ or higher
Oil control valve (C2-2) or OCV- (E3-14) - Body ground	10 kΩ or higher

Reconnect the camshaft timing oil control valve connector.
Reconnect the ECM connector.

Fig 3: Locating E3 ECM Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: CHECK FOR INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS )