Engine Control System (2ZR-FXE) (Service Information): Diagnosis Lexus CT I

ON-VEHICLE INSPECTION

1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Put the engine in inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine. 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 using the Techstream. HINT: If the result is not acceptable, cool the engine (engine coolant temperature is 30°C (86°F) or less) and perform the Active Test again. Test not possible with park (P) selected during charge control. Move shift lever to N to perform test. Standard Techstream Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls

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1. REMOVE NO. 2 CYLINDER HEAD COVER . Refer to «REMOVAL - Step 20»(ref-568735-S42395500822013072300000)
2. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Disconnect the camshaft timing oil control valve assembly connector. Remove the bolt and camshaft timing oil control valve assembly. Remove the O-ring from the camshaft timing oil control valve assembly.

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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. Check the operation. Connect a positive (+) auxiliary battery lead to terminal 1 and a negative (-) lead to terminal 2, and check the movement of the valve. TEXT IN ILLUSTRATION *a Voltage Applied *b Voltage not applied 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 stored.

1. INSPECT THROTTLE BODY ASSEMBLY Set the vehicle to inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-568589-S23460353802013072300000) . Start the engine and check that the MIL is not illuminated. After the engine is warmed up, check that the idle speed is within the specified range when the A/C is switched off. Standard Condition Engine Idle Speed A/C switched off 950 to 1050 RPM NOTE: Be sure to perform this step with all accessories off. Make sure that park (P) is selected.

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1. DRAIN ENGINE COOLANT (for Engine) . Refer to «REPLACEMENT - Step 1»(ref-568743-S28061158612013072300000)
2. REMOVE RADIATOR SUPPORT OPENING COVER . Refer to «REMOVAL - Step 1»(ref-568749-S05660375792013072300000)
3. REMOVE NO. 2 CYLINDER HEAD COVER . Refer to «REMOVAL - Step 20»(ref-568735-S42395500822013072300000)
4. REMOVE AIR CLEANER CAP SUB-ASSEMBLY Disconnect the mass air flow meter connector. Separate the water hose from the hose clamp. Release the 2 clamps. Loosen the hose clamp and remove the air cleaner cap.
5. REMOVE INLET AIR CLEANER ASSEMBLY Separate the water hose from the hose clamp. Separate the wire harness clamp from the inlet air cleaner assembly. Remove the 2 bolts, 2 clips and inlet air cleaner assembly.
6. REMOVE AIR CLEANER CASE Remove the air cleaner filter element. Separate the hose from the hose clamp. Remove the 2 bolts and air cleaner case.
7. REMOVE AIR CLEANER HOSE ASSEMBLY Loosen the hose clamp and separate the ventilation hose. Unlock the hose clamp and remove the air cleaner hose assembly.
8. REMOVE THROTTLE BODY ASSEMBLY Disconnect the throttle body connector and 2 water by-pass hoses. Remove the 2 bolts, 2 nuts and throttle body assembly. Remove the gasket from the intake manifold.

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

Note. Perform the mass air flow meter inspection in accordance with the following procedure. Replace the mass air flow meter only when foreign matter adheres to the sensor and the MAF value in the Data List (with the engine stopped) is not within the normal operating range.

1. INSPECT MASS AIR FLOW METER Read the values using the Techstream (MAF). 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 into the air cleaner case (installed on the vehicle). During the test, do not use an exhaust air duct on the exhaust pipe. Connect the Techstream to the DLC3. Turn the power switch on (IG) (do not run the engine). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF. Wait 30 seconds, and read the values on the Techstream. Standard Condition Tester Display Condition Standard Condition MAF Engine not running 30 seconds after power switch is turned on (IG) Less than 0.22 g/sec If the result is not as specified, replace the mass air flow meter. If the result is within the specified range, remove and inspect the mass air flow meter. Refer to «INSPECTION»(ref-568740-S17575267492013072300000) .

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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 shown in the illustration. TEXT IN ILLUSTRATION *1 Platinum Hot Wire (Heater) Result There is no foreign matter. If the result is not as specified, replace the mass air flow meter. Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 Mass Air Flow Meter Standard Resistance Tester Connection Condition Specified Condition 1 (THA) - 2 (E2) -20°C (-4°F) 13.6 to 18.4 kohms 20°C (68°F) 2.21 to 2.69 kohms 60°C (140°F) 0.49 to 0.67 kohms

INSPECTION

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 knock sensor with the bolt as shown in the illustration. TEXT IN ILLUSTRATION *a Front of Engine *b +/- 20° Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) NOTE: Make sure that the knock control sensor is in the correct position. Connect the knock sensor connector.
2. INSTALL INTAKE MANIFOLD Refer to «INSTALLATION»(ref-568745-S20027402912013072300000)

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1. REMOVE WINDSHIELD WIPER MOTOR AND LINK Refer to «REMOVAL»(ref-568751-S01287609102013072300000)
2. REMOVE NO. 1 HEATER AIR DUCT SPLASH SHIELD SEAL . Refer to «REMOVAL - Step 4»(ref-568722-S33475766382013072300000)
3. REMOVE NO. 2 HEATER AIR DUCT SPLASH SHIELD SEAL . Refer to «REMOVAL - Step 5»(ref-568722-S33475766382013072300000)
4. REMOVE COWL BODY MOUNTING REINFORCEMENT LH . Refer to «REMOVAL - Step 6»(ref-568722-S33475766382013072300000)
5. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY . Refer to «REMOVAL - Step 7»(ref-568722-S33475766382013072300000)
6. REMOVE NO. 2 CYLINDER HEAD COVER . Refer to «REMOVAL - Step 20»(ref-568735-S42395500822013072300000)
7. REMOVE AIR FUEL RATIO SENSOR NO. 2 Disconnect the air fuel ratio sensor connector and clamp. Using SST, remove the air fuel ratio sensor. SST: 09224-00010

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1. INSPECT AIR FUEL RATIO SENSOR NO. 2 Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *a Component without harness connected (Air Fuel Ratio Sensor) Standard Resistance Tester Connection Condition Specified Condition 1 (HA1A) - 2 (+B) 20°C (68°F) 1.6 to 3.2 ohms 1 (HA1A) - 4 (A1A-) - 10 kohms or higher If the result is not as specified, replace the air fuel ratio sensor.

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1. INSTALL AIR FUEL RATIO SENSOR NO. 2 Using SST, install the air fuel ratio sensor. TEXT IN ILLUSTRATION *a Fulcrum Length 30 mm *b Fulcrum Length 300 mm 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) NOTE: The "with SST" torque value is effective when using SST with a fulcrum length of 30 mm (1.18 in.) and a torque wrench with a fulcrum length of 300 mm (11.8 in.). Refer to «PRECAUTION»(ref-568589-S04857946582013072300000) . The "with SST" torque value is effective when SST is parallel to the torque wrench. Connect the air fuel ratio sensor connector and clamp.
2. INSTALL NO. 2 CYLINDER HEAD COVER . Refer to «INSTALLATION - Step 98»(ref-568735-S28791889062013072300000)
3. INSPECT FOR EXHAUST GAS LEAK
4. INSTALL OUTER COWL TOP PANEL SUB-ASSEMBLY . Refer to «INSTALLATION - Step 16»(ref-568722-S35969633432013072300000)
5. INSTALL COWL BODY MOUNTING REINFORCEMENT LH . Refer to «INSTALLATION - Step 17»(ref-568722-S35969633432013072300000)
6. INSTALL NO. 2 HEATER AIR DUCT SPLASH SHIELD SEAL . Refer to «INSTALLATION - Step 18»(ref-568722-S35969633432013072300000)
7. INSTALL NO. 1 HEATER AIR DUCT SPLASH SHIELD SEAL . Refer to «INSTALLATION - Step 19»(ref-568722-S35969633432013072300000)
8. INSTALL WINDSHIELD WIPER MOTOR AND LINK Refer to «INSTALLATION»(ref-568751-S08266385092013072300000)

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1. REMOVE FRONT NO. 3 ENGINE UNDER COVER Remove the 4 clips and front No. 3 engine under cover.
2. REMOVE HEATED OXYGEN SENSOR Disconnect the heated oxygen sensor connector. Remove the wire harness bracket. Remove the bolt and separate the wire harness clamp bracket. Disconnect the wire harness to remove the wire harness clamp bracket. Using SST, remove the heated oxygen sensor. SST: 09224-00010

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

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1. INSTALL HEATED OXYGEN SENSOR Using SST, install the heated oxygen sensor onto the front exhaust pipe. TEXT IN ILLUSTRATION *a Fulcrum Length 30 mm *b Fulcrum Length 300 mm 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) NOTE: The "with SST" torque value is effective when using SST with a fulcrum length of 30 mm (1.18 in.) and a torque wrench with a fulcrum length of 300 mm (11.8 in.). Refer to «PRECAUTION»(ref-568589-S04857946582013072300000) . The "with SST" torque value is effective when SST is parallel to the torque wrench. Connect the wire harness to install the wire harness clamp bracket. Install the wire harness clamp bracket with the bolt. Torque: 13 N*m (127 kgf*cm, 9 ft.*lbf) Install the wire harness bracket. Connect the heated oxygen sensor connector.
2. INSPECT FOR EXHAUST GAS LEAK
3. INSTALL FRONT NO. 3 ENGINE UNDER COVER Install the front No. 3 engine under cover with the 4 clips.

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1. REMOVE NO. 1 RELAY BLOCK COVER
2. REMOVE NO. 2 INTEGRATION RELAY Using a screwdriver with its tip wrapped in protective tape, disengage the 2 claws and disconnect the No. 2 integration relay. Disconnect the 3 connectors and remove the No. 2 integration relay.

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1. INSPECT NO. 2 INTEGRATION RELAY TEXT IN ILLUSTRATION *1 Integration Relay - - IG2 RELAY: Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 Integration Relay Standard Resistance Tester Connection Condition Specified Condition Integration relay (1C-1) - Integration relay (1A-4) Auxiliary battery voltage is not applied between terminals 1A-3 and 1A-2 10 kohms or higher Integration relay (1C-1) - Integration relay (1A-4) Auxiliary battery voltage is applied between terminals 1A-3 and 1A-2 Below 1 ohms If the resistance is not as specified, replace the integration relay. BATT FAN RELAY: Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 Integration Relay Standard Resistance Tester Connection Condition Specified Condition Integration relay (1C-1) - Integration relay (1A-8) Auxiliary battery voltage is not applied between terminals 1A-7 and 1A-6 10 kohms or higher Integration relay (1C-1) - Integration relay (1A-8) Auxiliary battery voltage is applied between terminals 1A-7 and 1A-6 Below 1 ohms If the resistance is not as specified, replace the integration relay. EFI MAIN RELAY: Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 Integration Relay Standard Resistance Tester Connection Condition Specified Condition Integration relay (1C-1) - Integration relay (1B-4) Auxiliary battery voltage is not applied between terminals 1B-2 and 1B-3 10 kohms or higher Integration relay (1C-1) - Integration relay (1B-4) Auxiliary battery voltage is applied between terminals 1B-2 and 1B-3 Below 1 ohms If the resistance is not as specified, replace the integration relay. C/OPN RELAY: Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 Integration Relay Standard Resistance Tester Connection Condition Specified Condition Integration relay (1B-5) - Integration relay (1B-8) Auxiliary battery voltage is not applied between terminals 1B-6 and 1B-7 10 kohms or higher Integration relay (1B-5) - Integration relay (1B-8) Auxiliary battery voltage is applied between terminals 1B-6 and 1B-7 Below 1 ohms If the resistance is not as specified, replace the integration relay.

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1. INSTALL NO. 2 INTEGRATION RELAY Connect the 3 connectors. Attach the No. 2 integration relay to the engine room relay block.
2. INSTALL NO. 1 RELAY BLOCK COVER