Engine Control System (Service Information) (2AR-FE): Diagnosis Toyota Camry XV50

ON-VEHICLE INSPECTION

1. INSPECT 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. Inspect the camshaft timing oil control valve assembly (for intake camshaft). Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for intake camshaft) using the Techstream. Standard Condition Tester Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls HINT: If the result is not acceptable, cool the engine (engine coolant temperature is 50°C (122°F) or less) and perform the Active Test again. Inspect the camshaft timing oil control valve assembly (for exhaust camshaft). Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1). Check the engine speed while operating the camshaft timing oil control valve assembly (for exhaust camshaft) using the Techstream. Standard Condition Tester Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls HINT: If the result is not acceptable, cool the engine (engine coolant temperature is 50°C (122°F) or less) and perform the Active Test again.

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1. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY . Refer to «REMOVAL - Step 18»(ref-507910-S10103231632012100900000)
2. SEPARATE ENGINE WIRE Remove the 2 nuts and separate the engine wire.
3. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Camshaft timing oil control valve assembly (for exhaust side) Disconnect the oil control valve connector. Remove the bolt and oil control valve. Remove the O-ring from the oil control valve. TEXT IN ILLUSTRATION *1 O-ring Camshaft timing oil control valve assembly (for intake side) Disconnect the oil control valve connector. Remove the bolt and oil control valve. Remove the O-ring from the oil control valve. TEXT IN ILLUSTRATION *1 O-ring

INSPECTION

HINT

Use the same procedure for the intake side and exhaust side.

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1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 ohms If the result is not as specified, replace the oil control valve assembly. Connect a positive (+) lead from the battery to terminal 1 and a negative (-) lead to terminal 2, and check the movement of the valve. TEXT IN ILLUSTRATION *1 Valve *a Component without harness connected (Camshaft Timing Oil Control Valve) *b When applied *c When cut off OK Condition Specified Condition Battery positive (+) voltage is applied Valve moves in left arrow direction shown in illustration Battery positive (+) voltage is cut off Valve moves in right arrow direction shown in illustration NOTE: Confirm that the valve moves freely and does not stick in any position. If necessary, replace the camshaft timing oil control valve assembly. HINT: Accumulation of foreign matter can cause minor pressure leaks. Minor pressure leaks will cause the camshaft to advance or retard, and this will cause a DTC to be set.

1. CHECK THROTTLE WITH MOTOR BODY ASSEMBLY Check the throttle control motor operating sound. Turn the ignition switch to ON. When depressing the accelerator pedal, check the operating sound of the running motor. Make sure that no friction noises are emitted from the motor. If friction noises exist, replace the throttle with motor body assembly. Check the throttle position sensor. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Perform the "Inspection After Repair" . Refer to «INITIALIZATION»(ref-507772-S36366337852012100900000) . Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Throttle Sensor Position. Depress the accelerator pedal. When the throttle valve is fully opened, check that the value of "Throttle Sensor Position" is within the specification. Standard throttle valve opening percentage 60% or more NOTE: When checking the standard throttle valve opening percentage, make sure that the shift lever is in N. If the percentage is less than 60%, replace the throttle with motor body assembly.

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1. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH
2. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH
3. REMOVE ENGINE UNDER COVER LH
4. REMOVE ENGINE UNDER COVER RH
5. DRAIN ENGINE COOLANT . Refer to «REPLACEMENT - Step 1»(ref-507914-S12836807282012100900000)
6. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY . Refer to «REMOVAL - Step 18»(ref-507910-S10103231632012100900000)
7. REMOVE AIR CLEANER CAP SUB-ASSEMBLY Disconnect the vacuum switching valve assembly from the air cleaner hose. Disconnect the mass air flow meter connector and 2 wire harness clamps from the air cleaner cap sub-assembly. Separate the fuel vapor feed hose from the air cleaner hose. Disconnect the ventilation hose from the cylinder head cover. Loosen the hose clamp and disconnect the air cleaner hose from the throttle with motor body assembly. Release the 2 clamps and remove the air cleaner cap sub-assembly.
8. REMOVE THROTTLE WITH MOTOR BODY ASSEMBLY Disconnect the fuel tube from the clamp. Disconnect the throttle body connector. Disconnect the water by-pass hose from the throttle with motor body assembly. Disconnect the No. 2 water by-pass hose from the throttle with motor body assembly. Remove the 4 bolts and throttle with motor body assembly with fuel tube bracket. Remove the bolt and fuel tube bracket. Remove the gasket from the intake manifold.

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1. INSPECT THROTTLE WITH MOTOR BODY ASSEMBLY Check that the throttle valve opens and closes smoothly. Check that there is no sludge accumulated around the throttle with motor body assembly. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 (M-) - 2 (M+) 20°C (68°F) 0.3 to 100 ohms TEXT IN ILLUSTRATION *a Component without harness connected: (Throttle with Motor Body Assembly) If the result is not as specified, replace the throttle with motor body assembly.

1. CHECK ACCELERATOR PEDAL SENSOR ASSEMBLY Measure the voltage. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Gas Throttle / Accel Sensor Out No. 1 and Accel Sensor Out No. 2. Read the value displayed on the Techstream. Standard Voltage Accelerator Pedal Operation Accel Sensor Out No. 1 Accel Sensor Out No. 2 Fully Released 0.5 to 1.1 V 1.2 to 2.0 V Fully Depressed 2.6 to 4.5 V 3.4 to 4.98 V If the result is not as specified, check the accelerator pedal sensor assembly, wire harness or ECM.

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1. REMOVE ACCELERATOR PEDAL SENSOR ASSEMBLY NOTE: Avoid physical shock to the accelerator pedal assembly. Do not disassemble the accelerator pedal assembly. Disconnect the accelerator pedal sensor connector. Remove the 2 bolts and accelerator pedal sensor assembly.

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1. INSTALL ACCELERATOR PEDAL SENSOR ASSEMBLY NOTE: Avoid physical shock to the accelerator pedal assembly. Do not disassemble the accelerator pedal assembly. Temporarily install the accelerator pedal sensor assembly with the 2 bolts. Tighten the 2 bolts in the order shown in the illustration. Torque: 5.4 N*m ( 55 kgf*cm, 48 in.*lbf) Connect the accelerator pedal connector.

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Note. Perform the mass air flow meter inspection according to the procedure below. Only replace the mass air flow meter when the mass air flow value in the Data List (with the engine stopped) is not within the normal operating range or there is foreign matter on the mass air flow meter platinum hot wire (heater).

1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY NOTE: Perform the inspection with the vehicle indoors and on a level surface. Perform the inspection of the mass air flow meter while it is installed to the air cleaner case (installed to the vehicle). During the test, do not use an exhaust air duct to perform suction on the exhaust pipe. Connect the Techstream to the DLC3. Turn the ignition switch to ON (do not run the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / MAF. Wait 30 seconds, and read the values on the Techstream. Standard Item Condition Specified Condition MAF Engine not running 30 seconds after turning ignition switch to ON Less than 0.47g/sec. If the result is not as specified, replace the mass air flow meter sub-assembly. If the result is as specified, inspect the mass air flow meter sub-assembly . Refer to «INSPECTION»(ref-507932-S41255499672012100900000) .

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1. REMOVE MASS AIR FLOW METER SUB-ASSEMBLY Disconnect the mass air flow meter connector. Remove the 2 screws and mass air flow meter sub-assembly.

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1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter sub-assembly shown in the illustration. TEXT IN ILLUSTRATION *1 Platinum Hot Wire (Heater) OK There is no foreign matter. Check the intake air temperature sensor (built into the mass air flow meter sub-assembly). Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component without harness connected (Mass Air Flow Meter Sub-assembly) Standard Resistance Tester Connection Condition Specified Condition 1 (THA) - 2 (E2) -20°C (-4°F) 13.6 to 18.4 kohms 1 (THA) - 2 (E2) 20°C (68°F) 2.21 to 2.69 kohms 1 (THA) - 2 (E2) 60°C (140°F) 0.49 to 0.67 kohms If the result is not as specified, replace the mass air flow meter sub-assembly.

1. INSPECT CRANKSHAFT POSITION SENSOR Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Cold 1630 to 2740 ohms Hot 2065 to 3225 ohms HINT: In the table above, the terms "Cold" and "Hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F). If the result is not as specified, replace the crankshaft position sensor.

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1. INSTALL CRANKSHAFT POSITION SENSOR Clean and degrease the threads of the bolt for the crankshaft position sensor. Apply a light coat of engine oil to the O-ring of the sensor. TEXT IN ILLUSTRATION *1 O-ring Apply adhesive to 2 or 3 threads of the bolt. TEXT IN ILLUSTRATION *1 Adhesive Adhesive Toyota Genuine Adhesive 1324, Three Bond 1324 or equivalent. Install the sensor with the bolt. Torque: 6.5 N*m ( 66 kgf*cm, 58 in.*lbf) NOTE: Make sure that the O-ring is not cracked or does not jump out of position during installation. Connect the sensor connector.
2. INSPECT FOR OIL LEAK

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1. REMOVE NO. 1 ENGINE COVER SUB-ASSEMBLY . Refer to «REMOVAL - Step 18»(ref-507910-S10103231632012100900000)
2. REMOVE IGNITION COIL ASSEMBLY Disconnect the 4 ignition coil assembly connectors. Remove the 4 bolts and 4 ignition coil assemblies.
3. REMOVE SPARK PLUG Using a spark plug wrench, remove the 4 spark plugs.

1. INSPECT KNOCK CONTROL SENSOR Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 120 to 280 kohms If the result is not as specified, replace the knock control sensor.