Engine Control System (service Information) Toyota Prius C I

Scheme 184

Scheme 185

ON-VEHICLE INSPECTION

1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Connect the Techstream to the DLC3. Turn the Techstream on. Set the vehicle to inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . Start the engine. Inspect the oil control valve. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1). Check the engine speed when the oil control valve is operated using the Techstream with the engine coolant temperature at 50°C (122°F) or less. HINT: When performing the Active Test, the air conditioning should be on. Engine coolant temperature when the engine is started should be 30°C (86°F) or less. Standard Control Range Specified Condition OFF Normal engine speed ON Rough idle or engine stalls (soon after oil control valve switched from OFF to ON)

Scheme 186

Scheme 187

1. REMOVE AIR CLEANER CAP SUB-ASSEMBLY See step 2
2. REMOVE AIR CLEANER CASE SUB-ASSEMBLY . Refer to «REMOVAL - Step 2»(/toyota/prius-c/i-2011-2015/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)
3. REMOVE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Disconnect the camshaft timing oil control valve assembly connector. Remove the bolt and remove the camshaft timing oil control valve assembly. Remove the O-ring from the camshaft timing oil control valve assembly. TEXT IN ILLUSTRATION *1 O-ring

Scheme 188

Scheme 189

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 TEXT IN ILLUSTRATION *a Component without harness connected (Oil Control Valve Assembly) If the result is not as specified, replace the oil control valve assembly. Check the operation. Connect a positive (+) auxiliary battery lead to terminal 2 and a negative (-) lead to terminal 1, and check the movement of the valve. TEXT IN ILLUSTRATION *a When applied *b When cut off 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.

INSTALLATION

1. INSTALL CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Apply a light coat of engine oil to a new O-ring and install it onto the camshaft timing oil control valve assembly. TEXT IN ILLUSTRATION *1 O-ring NOTE: Do not twist the O-ring. Install the camshaft timing oil control valve assembly and wire harness bracket with the bolt. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf) Connect the camshaft timing oil control valve assembly connector.
2. INSPECT FOR OIL LEAK
3. INSTALL AIR CLEANER CASE SUB-ASSEMBLY . Refer to «INSTALLATION - Step 2»(/toyota/prius-c/i-2011-2015/remont/auxiliary-emission-control-systems/#emission-control-system-service-information)
4. INSTALL AIR CLEANER CAP SUB-ASSEMBLY See step 2

Scheme 190

Scheme 191

1. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY Set the vehicle to inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . 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.

Scheme 192

Scheme 193

Scheme 194

Scheme 195

Scheme 196

Scheme 197

Scheme 198

1. DRAIN COOLANT (for Engine) . Refer to «REPLACEMENT - Step 1»(/toyota/prius-c/i-2011-2015/remont/cooling-fan/#engine-cooling-system-service-information)
2. REMOVE AIR CLEANER CAP SUB-ASSEMBLY Disconnect the ventilation hose. Disconnect the purge VSV. Disconnect the mass air flow meter connector. Disconnect the wire harness clamp. Release the 2 clamps. Loosen the hose clamp and remove the air cleaner cap sub-assembly.
3. REMOVE THROTTLE BODY WITH MOTOR ASSEMBLY Disconnect the throttle body with motor connector and the 2 water by-pass hoses. Remove the 3 bolts. Remove the throttle body with motor assembly. Remove the gasket from the intake manifold.

Scheme 199

1. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY Measure the resistance according to the value(s) in the table below. TEXT IN ILLUSTRATION *1 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 with motor assembly.

Scheme 200

1. INSTALL THROTTLE BODY WITH MOTOR ASSEMBLY Install a new gasket onto the intake manifold. Install the throttle body with motor assembly with the 3 bolts. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) Connect the 2 water by-pass hoses and throttle body with motor connector.
2. INSTALL AIR CLEANER CAP SUB-ASSEMBLY Install the air cleaner hose sub-assembly and lock the hose clamp. TEXT IN ILLUSTRATION *a Engine Side *b 75° NOTE: Align the groove of the air cleaner hose with the tab of the throttle with motor body assembly and install the hose. Make sure that the tab of the air cleaner hose clamp stays within the range shown by *b. Install the air cleaner cap sub-assembly with the 2 clamps. Connect the wire harness clamp. Connect the mass air flow meter connector. Connect the purge VSV. Connect the ventilation hose.
3. ADD COOLANT (for Engine) . Refer to «REPLACEMENT - Step 2»(/toyota/prius-c/i-2011-2015/remont/cooling-fan/#engine-cooling-system-service-information)
4. INSPECT FOR COOLANT LEAK (for Engine) . Refer to «ON-VEHICLE INSPECTION - Step 1»(/toyota/prius-c/i-2011-2015/remont/cooling-fan/#engine-cooling-system-inspection)
5. PERFORM INITIALIZATION NOTE: Be sure to perform this procedure after reassembling the throttle body assembly, removing and reinstalling any throttle body component or replacing the ECM. Turn the power switch on (IG) without operating the accelerator pedal. NOTE: If the accelerator pedal is operated, perform the above step again. Connect the Techstream to the DLC3 and clear the DTCs See step 1 . Perform "Inspection After Repair". Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Set the vehicle to the inspection mode (maintenance mode). Refer to «INSPECTION MODE PROCEDURE»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . Start the engine without operating the accelerator pedal and check that the MIL is not illuminated and that the idle speed is within the specified range when the air conditioning is switched off after the engine is warmed up. 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. Perform a road test and confirm that there are no abnormalities.

Scheme 201

Scheme 202

Scheme 203

Scheme 204

Scheme 205

Scheme 206

Scheme 207

1. PRECAUTION NOTE: After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notice before proceeding with work. Refer to «PRECAUTION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) .
2. REMOVE FRONT FLOOR COVER RH . Refer to «REMOVAL - Step 3»(/toyota/prius-c/i-2011-2015/remont/seats/#seats-service-information)
3. DISCONNECT CABLE FROM AUXILIARY BATTERY NEGATIVE TERMINAL NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction__initialization) .
4. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/wiperwasher-systems/#wiper-system-washer-system-service-information) .
5. REMOVE INNER COWL TOP TO COWL BRACE . Refer to «REMOVAL - Step 4»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
6. REMOVE FRONT AIR SHUTTER SEAL . Refer to «REMOVAL - Step 5»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
7. REMOVE FRONT NO. 1 VENTILATOR SEAL . Refer to «REMOVAL - Step 6»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
8. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY . Refer to «REMOVAL - Step 7»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
9. REMOVE ECM Push the locks on the 2 levers, then raise the levers, and disconnect the 2 ECM connectors. NOTE: After disconnecting the connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the connectors. Remove the bolt and nut. Remove the ECM. Remove the nut. Remove the 4 screws, ECM cover and No. 2 ECM bracket.

Scheme 208

1. INSTALL ECM Install the ECM cover and No. 2 ECM bracket with the 4 screws. Torque: 3.0 N*m (31 kgf*cm, 27 in.*lbf) Install the nut. Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) Install the ECM with the bolt and nut. Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) Connect the 2 ECM connectors and lower the 2 levers. NOTE: When connecting the connectors, make sure that dirt, water or other foreign matter does not get caught between the connectors and other parts. Make sure that the 2 levers are securely locked.
2. INSTALL OUTER COWL TOP PANEL SUB-ASSEMBLY . Refer to «INSTALLATION - Step 16»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
3. INSTALL FRONT NO. 1 VENTILATOR SEAL . Refer to «INSTALLATION - Step 17»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
4. INSTALL FRONT AIR SHUTTER SEAL . Refer to «INSTALLATION - Step 18»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
5. INSTALL INNER COWL TOP TO COWL BRACE . Refer to «INSTALLATION - Step 19»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
6. INSTALL WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY Refer to «INSTALLATION»(/toyota/prius-c/i-2011-2015/remont/wiperwasher-systems/#wiper-system-washer-system-service-information__installation) .
7. CONNECT CABLE TO AUXILIARY BATTERY NEGATIVE TERMINAL NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction__initialization) .
8. INSTALL FRONT FLOOR COVER RH . Refer to «INSTALLATION - Step 7»(/toyota/prius-c/i-2011-2015/remont/seats/#seats-service-information)
9. PERFORM INITIALIZATION HINT: Initialization cannot be completed by only disconnecting and reconnecting the cable of the negative (-) auxiliary battery terminal. Perform Initialization when replacing the ECM See step 5 .

Scheme 209

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.

HINT

Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly. Refer to INITIALIZATION .

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 ignition switch to 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 Techstream Display Condition Standard Condition MAF Engine not running 30 seconds after ignition switch is turned to ON (IG) Less than 0.18 gm/s 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»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#engine-control-system-service-information) .

Scheme 210

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

Scheme 211

Scheme 212

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. 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 If the result is not as specified, replace the mass air flow meter.

1. INSTALL MASS AIR FLOW METER Install the mass air flow meter with the 2 screws. NOTE: Make sure that the O-ring is not cracked or does not jump out of position during installation. HINT: Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Connect the mass air flow meter connector.

Scheme 213

Scheme 214

1. REMOVE CAM POSITION SENSOR Disconnect the cam position sensor connector. Remove the bolt and cam position sensor.

INSPECTION

1. INSPECT CAM 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 resistance is not as specified, replace the cam position sensor.

Scheme 215

1. INSTALL CAM POSITION SENSOR Apply a light coat of engine oil to the O-ring on the cam position sensor. Install the cam position sensor with the bolt. Torque: 8.0 N*m (82 kgf*cm, 71 in.*lbf) Connect the cam position sensor connector.
2. INSPECT FOR OIL LEAK

Scheme 216

Scheme 217

1. REMOVE CRANK POSITION SENSOR Disconnect the crank position sensor connector. Remove the bolt and crank position sensor.

1. INSPECT CRANK POSITION SENSOR Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition 1 - 2 Cold 985 to 1600 ohms Hot 1265 to 1890 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 resistance is not as specified, replace the camshaft position sensor.

Scheme 218

1. INSTALL CRANK POSITION SENSOR Apply a light coat of engine oil to the O-ring on the crank position sensor. TEXT IN ILLUSTRATION *1 O-ring Install the crank position sensor with the bolt. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf) Connect the crank position sensor connector.
2. INSPECT FOR OIL LEAK

Scheme 219

Scheme 220

Scheme 221

1. REMOVE NO. 1 IGNITION COIL Disconnect the 4 No. 1 ignition coil connectors. Remove the 4 bolts and 4 No. 1 ignition coils. NOTE: When removing each ignition coil, do not damage the plug cap on the engine head cover opening or the upper edge of the spark plug tube.
2. REMOVE SPARK PLUG Using a 16 mm spark plug wrench, remove the 4 spark plugs.

Scheme 222

1. INSTALL SPARK PLUG Using a 16 mm spark plug wrench, install the 4 spark plugs. Torque: 18 N*m (183 kgf*cm, 13 ft.*lbf) NOTE: If a component has been dropped or subjected a strong impact, replace it. HINT: Perform "Inspection After Repairs" after replacing the spark plug. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) .
2. INSTALL NO. 1 IGNITION COIL Install the 4 No. 1 ignition coils with the 4 bolts. TEXT IN ILLUSTRATION *a Body *b Cap Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) NOTE: If the body or cap of the ignition coil is dropped or subjected to a strong impact, replace the ignition coil with a new one. HINT: Perform "Inspection After Repairs" after replacing the ignition coil assembly. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Connect the 4 No. 1 ignition coil connectors.

Scheme 223

Scheme 224

Scheme 225

Scheme 226

1. DRAIN COOLANT (for Engine) . Refer to «REPLACEMENT - Step 1»(/toyota/prius-c/i-2011-2015/remont/cooling-fan/#engine-cooling-system-service-information)
2. REMOVE INVERTER WITH CONVERTER ASSEMBLY Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#hybrid-battery-control-system-service-information__removal) .
3. REMOVE ENGINE COOLANT TEMPERATURE SENSOR Disconnect the wire harness. Disconnect the engine coolant temperature sensor connector. Using a union nut wrench 19 mm, remove the engine coolant temperature sensor. TEXT IN ILLUSTRATION *a Union Nut Wrench *b Gasket Remove the gasket from the engine coolant temperature sensor.

Scheme 227

1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR Measure the resistance according to the value(s) in the table below. Standard Resistance Condition Specified Condition Approximately 20°C (68°F) 2.32 to 2.59 kohms Approximately 80°C (176°F) 0.310 to 0.326 kohms NOTE: When checking the engine coolant temperature sensor in water, keep the terminals dry. After the check, dry the sensor. If the resistance is not as specified, replace the engine coolant temperature sensor.

1. INSTALL ENGINE COOLANT TEMPERATURE SENSOR Install a new gasket to the engine coolant temperature sensor. Using a union nut wrench 19 mm, install the engine coolant temperature sensor. Torque: 20 N*m (200 kgf*cm, 14 ft.*lbf) NOTE: Use the torque value compensation formula to calculate the torque value for use when a torque wrench is combined with a tool such as a union nut wrench. Refer to «PRECAUTION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . HINT: Perform "Inspection After Repair" after replacing the engine coolant temperature sensor. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Connect the engine coolant temperature sensor connector. Connect the wire harness.
2. ADD COOLANT (for Engine) . Refer to «REPLACEMENT - Step 2»(/toyota/prius-c/i-2011-2015/remont/cooling-fan/#engine-cooling-system-service-information)
3. INSPECT FOR COOLANT LEAK (for Engine) . Refer to «ON-VEHICLE INSPECTION - Step 1»(/toyota/prius-c/i-2011-2015/remont/cooling-fan/#engine-cooling-system-inspection)
4. INSTALL INVERTER WITH CONVERTER ASSEMBLY Refer to «INSTALLATION»(/toyota/prius-c/i-2011-2015/remont/engine-control-systems/#hybrid-battery-control-system-service-information__installation) .

Scheme 228

Scheme 229

1. REMOVE INTAKE MANIFOLD Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/exhaust/#intake-system-exhaust-system-service-information)
2. REMOVE KNOCK CONTROL SENSOR Disconnect the knock control sensor connector. Remove the bolt and remove the knock control sensor.

Scheme 230

1. INSPECT KNOCK CONTROL SENSOR TEXT IN ILLUSTRATION *1 Ohmmeter 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.

Scheme 231

1. INSTALL KNOCK CONTROL SENSOR Install the knock control sensor with the bolt as shown in the illustration. TEXT IN ILLUSTRATION *a Front of Engine *b 10° *c 30° Torque: 20 N*m (204 kgf*cm, 15 ft.*lbf) NOTE: Make sure that the knock control sensor is in the correct position. HINT: Perform "Inspection After Repair" after replacing the knock control sensor. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Connect the knock control sensor connector.
2. INSTALL INTAKE MANIFOLD Refer to «INSTALLATION»(/toyota/prius-c/i-2011-2015/remont/exhaust/#intake-system-exhaust-system-service-information__installation)

Scheme 232

Scheme 233

Scheme 234

1. REMOVE WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/wiperwasher-systems/#wiper-system-washer-system-service-information) .
2. REMOVE INNER COWL TOP TO COWL BRACE . Refer to «REMOVAL - Step 4»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
3. REMOVE FRONT AIR SHUTTER SEAL . Refer to «REMOVAL - Step 5»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
4. REMOVE FRONT NO. 1 VENTILATOR SEAL . Refer to «REMOVAL - Step 6»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
5. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY . Refer to «REMOVAL - Step 7»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
6. REMOVE AIR FUEL RATIO SENSOR Disconnect the air fuel ratio sensor connector and 2 clamps. Using SST, remove the air fuel ratio sensor. SST: 09224-00010

Scheme 235

1. INSPECT AIR FUEL RATIO SENSOR 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.

Scheme 236

1. INSTALL AIR FUEL RATIO SENSOR Using SST, install the air fuel ratio sensor. TEXT IN ILLUSTRATION *a Fulcrum Length 30 mm (1.18 in.) *b Fulcrum Length 260 mm (10.2 in.) SST: 09224-00010 without SST Torque: 44 N*m (449 kgf*cm, 32 ft.*lbf) with SST Torque: 39 N*m (398 kgf*cm, 29 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 260 mm (10.2 in.). Refer to «PRECAUTION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . The "with SST" torque value is effective when SST is parallel to the torque wrench. HINT: Perform "Inspection After Repair" after replacing the air fuel ratio sensor. Refer to «INITIALIZATION»(/toyota/prius-c/i-2011-2015/remont/testing-diagnostics/#engine-control-system-diagnostics-introduction) . Connect the air fuel ratio sensor connector and 2 clamps.
2. INSTALL OUTER COWL TOP PANEL SUB-ASSEMBLY . Refer to «INSTALLATION - Step 16»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
3. INSTALL FRONT NO. 1 VENTILATOR SEAL . Refer to «INSTALLATION - Step 17»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
4. INSTALL FRONT AIR SHUTTER SEAL . Refer to «INSTALLATION - Step 18»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
5. INSTALL INNER COWL TOP TO COWL BRACE . Refer to «INSTALLATION - Step 19»(/toyota/prius-c/i-2011-2015/remont/mechanical-hydraulic/#brake-system-hydraulic-service-information)
6. INSTALL WINDSHIELD WIPER MOTOR AND LINK ASSEMBLY Refer to «INSTALLATION»(/toyota/prius-c/i-2011-2015/remont/wiperwasher-systems/#wiper-system-washer-system-service-information__installation) .

Scheme 237

Scheme 238

1. REMOVE EXHAUST MANIFOLD Refer to «REMOVAL»(/toyota/prius-c/i-2011-2015/remont/exhaust/#intake-system-exhaust-system-service-information) .
2. REMOVE HEATED OXYGEN SENSOR Using SST, remove the heated oxygen sensor. SST: 09224-00010

Scheme 239

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.

Scheme 240

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 (1.18 in.) *b Fulcrum Length 260 mm (10.2 in.) SST: 09224-00010 without SST Torque: 44 N*m (449 kgf*cm, 32 ft.*lbf) with SST Torque: 39 N*m (398 kgf*cm, 29 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 260 mm (10.2 in.). Refer to «PRECAUTION»(/toyota/prius-c/i-2011-2015/remont/hoistjack/#introduction) . The "with SST" torque value is effective when SST is parallel to the torque wrench.
2. INSTALL EXHAUST MANIFOLD Refer to «INSTALLATION»(/toyota/prius-c/i-2011-2015/remont/exhaust/#intake-system-exhaust-system-service-information)

Scheme 241

Scheme 242

Scheme 243

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

Scheme 244

Scheme 245

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

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

See also:
• INSPECTION MODE PROCEDURE
• REMOVAL - Step 2
• REPLACEMENT - Step 1
• ON-VEHICLE INSPECTION - Step 1
• INITIALIZATION
• REMOVAL - Step 3
• INITIALIZATION
• REMOVAL
• REMOVAL - Step 4
• INSTALLATION
• REMOVAL
• INSTALLATION
• REMOVAL
• INSTALLATION
• INSPECTION