Engine Control System (1GR-FE) (Service Information): Diagnosis Toyota 4Runner V

ON-VEHICLE INSPECTION

1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Connect the Techstream to the DLC3. Start the engine. Turn the Techstream on. Inspect the oil control valve (for intake camshaft). Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 1). Operate the oil control valve using the Techstream, and then check the engine speed. OK Control Range Specified Condition OFF Normal engine speed ON Rough idle or engine stalls soon after oil control valve switched from OFF to ON If the operation is not as specified, check the oil control valve, wire harness and ECM. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT System (Bank 2). Operate the oil control valve using the Techstream, and then check the engine speed. OK Control Range Specified Condition OFF Normal engine speed ON Rough idle or engine stalls soon after oil control valve switched from OFF to ON If the operation is not as specified, check the oil control valve, wire harness and ECM. Inspect the oil control valve (for exhaust camshaft). Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 1). Operate the oil control valve using the Techstream, and then check the engine speed. OK Control Range Specified Condition -100% Normal engine speed 100% Rough idle or engine stalls soon after oil control valve switched to 100% If the operation is not as specified, check the oil control valve, wire harness and ECM. Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Exhaust Linear (Bank 2). Operate the oil control valve using the Techstream, and then check the engine speed. OK Control Range Specified Condition -100% Normal engine speed 100% Rough idle or engine stalls soon after oil control valve switched to 100% If the operation is not as specified, check the oil control valve, wire harness and ECM.

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1. REMOVE V-BANK COVER . Refer to «REMOVAL - Step 6»(ref-422104-S02945449112011092600000)
2. REMOVE NO. 1 AIR CLEANER HOSE . Refer to «REMOVAL - Step 7»(ref-422104-S02945449112011092600000)
3. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Intake Side of Bank 1) Disconnect the oil control valve connector. Remove the bolt and oil control valve. Remove the O-ring from the oil control valve.
4. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Exhaust Side of Bank 1) Disconnect the oil control valve connector. Remove the bolt and oil control valve. Remove the O-ring from the oil control valve.
5. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Intake Side of Bank 2) Disconnect the oil control valve connector. Remove the bolt and oil control valve. Remove the O-ring from the oil control valve.
6. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (for Exhaust Side of Bank 2) Disconnect the oil control valve connector. Remove the bolt and oil control valve. Remove the O-ring from the oil control valve.

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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 camshaft timing oil control valve. Connect the positive (+) lead of the battery to terminal 1 and the negative (-) lead to terminal 2 and check the movement of the valve. OK Tester Connection Condition Specified Condition 1 - 2 Battery positive (+) voltage is applied Valve moves in direction of left arrow shown in illustration Battery positive (+) voltage is cut off Valve moves in direction of right arrow shown in illustration If the result is not as specified, replace the camshaft timing oil control valve. If the valve cannot return properly because of foreign matter, a small pressure leak in the advanced direction may occur and a DTC may be stored.

1. CHECK THROTTLE BODY WITH MOTOR ASSEMBLY Check the throttle control motor operating sounds. 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 noise exists, replace the throttle body. Check the throttle position sensor. 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 / All Data / 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 HINT: When checking the standard throttle valve opening percentage, the shift lever should be in N. If the percentage is less than 60%, replace the throttle body.

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1. REMOVE UPPER RADIATOR SUPPORT SEAL . Refer to «REMOVAL - Step 14»(ref-422094-S37137550332011092600000)
2. REMOVE FRONT BUMPER COVER LOWER . Refer to «REMOVAL - Step 6»(ref-422094-S37137550332011092600000)
3. REMOVE NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY . Refer to «REMOVAL - Step 7»(ref-422094-S37137550332011092600000)
4. DRAIN ENGINE COOLANT . Refer to «REPLACEMENT - Step 5»(ref-422100-S21080110422011092600000)
5. REMOVE V-BANK COVER . Refer to «REMOVAL - Step 6»(ref-422104-S02945449112011092600000)
6. REMOVE NO. 1 AIR CLEANER HOSE . Refer to «REMOVAL - Step 7»(ref-422104-S02945449112011092600000)
7. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY Disconnect the No. 5 water by-pass hose. Disconnect the No. 4 water by-pass hose. Disconnect the throttle position sensor and throttle control motor connector. Remove the 4 bolts, throttle body with motor and gasket.

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1. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 2 (M+) - 1 (M-) 20°C (68°F) 0.3 to 100 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Throttle Body with Motor) If the result is not as specified, replace the throttle body with motor assembly.

1. INSPECT ACCELERATOR PEDAL SENSOR ASSEMBLY 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 / ETCS / 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 Released 0.5 to 1.1 V 1.2 to 2.0 V Depressed 2.6 to 4.5 V 3.4 to 5.3 V If the result is not as specified, check the accelerator pedal, wire harness and ECM.

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1. REMOVE ACCELERATOR PEDAL SENSOR ASSEMBLY Disconnect the accelerator pedal position sensor connector. Remove the 2 nuts and accelerator pedal sensor.

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

1. INSPECT MASS AIR FLOW METER Read the value using the Techstream. NOTE: Perform the inspection with the vehicle indoors and on a level surface. Perform the inspection of the MAF meter while it is installed to the air cleaner case (installed to the vehicle). During the test, do not use the exhaust air duct to apply suction to the exhaust pipe. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / MAF. Wait 30 seconds and read the value on the Techstream. Standard Item Condition Specified Condition MAF Engine not running 30 seconds after ignition switch is turned ON Less than 0.87 g/sec. If the result is not as specified, replace the mass air flow meter. If the result is within the specified range, inspect the mass air flow meter, refer to «INSPECTION»(ref-421954-S35598060202011092600000) .

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1. REMOVE MASS AIR FLOW METER Disconnect the mass air flow meter connector. Remove the 2 screws and mass air flow meter.

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1. INSPECT MASS AIR FLOW METER Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter in the areas shown in the illustration. OK There is no foreign matter. TEXT IN ILLUSTRATION *1 Platinum Hot Wire (Heater) If the result is not as specified, replace the mass air flow meter.

INSPECTION

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 NOTE: In the table above, the terms "Cold" and "Hot" refer to the temperature of the sensor. "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 sensor.

1. INSPECT KNOCK 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 sensor.

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1. INSTALL KNOCK SENSOR Install the 2 sensors with the 2 bolts as shown in the illustration. Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) TEXT IN ILLUSTRATION *A for Bank 2 *B for Bank 1 *a Engine Rear *b Top *c Engine Front Connect the 2 sensor connectors.
2. INSTALL NO. 1 WATER OUTLET PIPE Install the water outlet pipe with the 2 nuts and bolt. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) Attach the 3 wire harness clamps.
3. INSTALL CYLINDER HEAD SUB-ASSEMBLY (for Bank 1) Install the cylinder head, refer to «INSTALLATION»(ref-422094-S37074903082011092600000) .

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1. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY Remove the exhaust manifold, refer to «REMOVAL»(ref-422104-S23626308532011092600000) .
2. REMOVE AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1) Using SST, remove the sensor. SST: 09224-00010
3. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1) Using SST, remove the sensor. SST: 09224-00010

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1. INSPECT AIR FUEL RATIO SENSOR Measure the heater resistance according to the value(s) in the table below. Standard Resistance (for Bank 1) Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA1A) - 4 (A1A-) Always 10 kohms or higher Standard Resistance (for Bank 2) Tester Connection Condition Specified Condition 1 (HA2A) - 2 (+B) 20°C (68°F) 1.8 to 3.4 ohms 1 (HA2A) - 4 (A2A-) Always 10 kohms or higher TEXT IN ILLUSTRATION *A for Bank 1 *B for Bank 2 *a Component without harness connected (Air Fuel Ratio Sensor) If the result is not as specified, replace the air fuel ratio sensor.

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1. INSTALL AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1) Using SST, install the sensor. SST: 09224-00010 without SST Torque: 44 N*m (449 kgf*cm, 32 ft.*lbf) with SST Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) TEXT IN ILLUSTRATION *a Fulcrum Length HINT: Use a torque wrench with a fulcrum length of 30 cm (11.8 in.). When using a torque wrench with a fulcrum length that is not 30 cm (11.8 in.), calculate the torque specification for the torque wrench and SST based on the "without SST" torque specification, refer to «PRECAUTION»(ref-421949-S22582508442011092600000) . Make sure SST and the wrench are connected in a straight line.
2. INSTALL AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1) Using SST, install the sensor. SST: 09224-00010 without SST Torque: 44 N*m (449 kgf*cm, 32 ft.*lbf) with SST Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) TEXT IN ILLUSTRATION *a Fulcrum Length HINT: Use a torque wrench with a fulcrum length of 30 cm (11.8 in.). When using a torque wrench with a fulcrum length that is not 30 cm (11.8 in.), calculate the torque specification for the torque wrench and SST based on the "without SST" torque specification, refer to «PRECAUTION»(ref-421949-S22582508442011092600000) . Make sure SST and the wrench are connected in a straight line.
3. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY Install the exhaust manifold, refer to «INSTALLATION»(ref-422104-S04837127142011092600000) .

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1. REMOVE HEATED OXYGEN SENSOR (for Bank 1 Sensor 2) Disconnect the sensor connector. Using SST, remove the sensor. SST: 09224-00010
2. REMOVE HEATED OXYGEN SENSOR (for Bank 2 Sensor 2) Using SST, remove the sensor. SST: 09224-00010

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1. INSPECT HEATED OXYGEN SENSOR Measure the resistance according to the value(s) in the table below. Standard Resistance (for Bank 1) Tester Connection Condition Specified Condition 1 (HT1B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT1B) - 4 (E2) Always 10 kohms or higher Standard Resistance (for Bank 2) Tester Connection Condition Specified Condition 1 (HT2B) - 2 (+B) 20°C (68°F) 11 to 16 ohms 1 (HT2B) - 4 (E2) Always 10 kohms or higher TEXT IN ILLUSTRATION *A for Bank 1 *B for Bank 2 *a Component without harness connected (Heated Oxygen Sensor) If the result is not as specified, replace the heated oxygen sensor.

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1. INSTALL HEATED OXYGEN SENSOR (for Bank 1 Sensor 2) Temporarily install the sensor to the exhaust pipe by hand. Using SST, tighten the sensor. SST: 09224-00010 without SST Torque: 44 N*m (449 kgf*cm, 32 ft.*lbf) with SST Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) TEXT IN ILLUSTRATION *1 Fulcrum Length HINT: Use a torque wrench with a fulcrum length of 30 cm (11.8 in.). When using a torque wrench with a fulcrum length that is not 30 cm (11.8 in.), calculate the torque specification for the torque wrench and SST based on the "without SST" torque specification, refer to «PRECAUTION»(ref-421949-S22582508442011092600000) . Make sure SST and the wrench are connected in a straight line. Connect the sensor connector.
2. INSTALL HEATED OXYGEN SENSOR (for Bank 2 Sensor 2) Temporarily install the sensor to the exhaust pipe by hand. Using SST, tighten the sensor. SST: 09224-00010 without SST Torque: 44 N*m (449 kgf*cm, 32 ft.*lbf) with SST Torque: 40 N*m (408 kgf*cm, 30 ft.*lbf) TEXT IN ILLUSTRATION *1 Fulcrum Length HINT: Use a torque wrench with a fulcrum length of 30 cm (11.8 in.). When using a torque wrench with a fulcrum length that is not 30 cm (11.8 in.), calculate the torque specification for the torque wrench and SST based on the "without SST" torque specification, refer to «PRECAUTION»(ref-421949-S22582508442011092600000) . Make sure SST and the wrench are connected in a straight line.

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1. INSPECT POWER STEERING OIL PRESSURE SWITCH Check the oil pressure switch. 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 / Power Steering Switch. Start the engine. Read the value displayed on the Techstream. OK Condition Specified Condition Power steering operating ON Power steering not operating OFF If the result is not as specified, check the wire harness and connector. If the wire harness and connector are normal, replace the power steering oil pressure switch.

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1. DRAIN POWER STEERING FLUID
2. REMOVE POWER STEERING OIL PRESSURE SWITCH Disconnect the oil pressure switch connector. Using a 24 mm deep socket wrench, remove the oil pressure switch.