Inspection Procedure

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

HINT:

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)

Connect the Techstream to the DLC3.
Start the engine.
Turn the Techstream on.
Turn the A/C switch on.
Enter the following menus: Powertrain/Engine/Active Test/Control the VVT System (Bank 1).

Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream.

Result

TECHSTREAM OPERATION CHART

Techstream Operation	Specified Condition
OFF	Normal engine speed
ON	Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON)

HINT:

If the result is not acceptable, cool the engine and perform the Active Test again.

Start the engine when the engine coolant temperature is 30°C (86°F) or less.
Turn the Techstream on.
Turn the A/C switch on.
Enter the following menus: Powertrain/Engine/Active Test/Control the VVT System (Bank 1).

Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream when the engine coolant temperature is 50°C (122°F) or less.

Result

TECHSTREAM OPERATION CHART

Techstream Operation	Specified Condition
OFF	Normal engine speed
ON	Engine idles roughly or stalls (soon after camshaft timing oil control valve assembly switched from OFF to ON)

NG: Go to step 2

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

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)

Remove the camshaft timing oil control valve assembly (for intake camshaft).

Measure the resistance according to the value(s) in the table below.

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	6.9 to 7.9 Ω

Fig 1: Inspecting Camshaft Timing Oil Control Valve Assembly

Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation.
OK:

Valve moves quickly.
Reinstall the camshaft timing oil control valve assembly (for intake camshaft).
NG: REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) (See REMOVAL )

Fig 2: Connecting Battery Terminals To Camshaft Timing Oil Control Valve Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

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

Disconnect the camshaft timing oil control valve assembly (for intake camshaft) connector.
Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
B25-1 - B49-28 (OC1+)	Always	Below 1 Ω
B25-2 - B49-22 (OC1-)	Always	Below 1 Ω

Standard Resistance (Check for Short)

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
B25-1 or B49-28 (OC1+) - Body ground	Always	10 kΩ or higher
B25-2 or B49-22 (OC1-) - Body ground	Always	10 kΩ or higher

Reconnect the camshaft timing oil control valve assembly (for intake camshaft) connector.
Reconnect the ECM connector.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying Camshaft Timing Oil Control Valve Assembly And ECM Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE ECM (See REMOVAL )