Home ReviewsRefund
Home/Mazda/3/Mazda 3 BM (2013-2016)/Repair manual/Testing & Diagnostics/Engine Control System [Mzr 2.0, Mzr 2.5]: Removal & Install…
Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Control System [Mzr 2.0, Mzr 2.5]: Removal & Installation Mazda 3 BM

Testing & Diagnostics 17 illustrations ~1381 words

VARIABLE TUMBLE SHUTTER VALVE SWITCH REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

Note. The variable tumble shutter valve switch cannot be removed as a single unit. When replacing the variable tumble shutter valve switch, replace it together with the intake manifold as a single unit.

  1. Remove the intake manifold. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579361-S37454927402013100700000) .)

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

WARNINGWhen the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor.

Scheme 25

Scheme 25: ECT Sensor No.1
Scheme 25: ECT Sensor No.1
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT [MZR 2.0, MZR 2.5]»(ref-579357-S09737378012013100700000).)
  4. Remove the battery and battery tray. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  5. Disconnect the ECT sensor No.1 connector.
  6. Remove the ECT sensor No.1 using the SST. (Scheme 25): ECT Sensor No.1 And SST With Torque Specifications
  7. Install in the reverse order of removal.
  8. Refill the engine coolant. (See «ENGINE COOLANT REPLACEMENT [MZR 2.0, MZR 2.5]»(ref-579357-S09737378012013100700000).)

Scheme 26

Scheme 26: ECT Sensor No.2
Scheme 26: ECT Sensor No.2
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT [MZR 2.0, MZR 2.5]»(ref-579357-S09737378012013100700000).)
  4. Disconnect the ECT sensor No.2 connector.
  5. Remove the ECT sensor No.2 using the SST. (Scheme 26): ECT Sensor No.2 And SST With Torque Specifications NOTE: Wipe off any oil or engine coolant if it gets on the ECT sensor No.2 installation area.
  6. Install in the reverse order of removal.
  7. Refill the engine coolant. (See «ENGINE COOLANT REPLACEMENT [MZR 2.0, MZR 2.5]»(ref-579357-S09737378012013100700000).)

MASS AIR FLOW (MAF)/INTAKE AIR TEMPERATURE (IAT) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

Note. Because the IAT sensor is integrated in the MAF sensor, replacing the IAT sensor includes replacement of the MAF/IAT sensor.

  1. Remove the MAF/IAT sensor. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579361-S37454927402013100700000) .)

BAROMETRIC PRESSURE (BARO) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

Note. Because the BARO sensor is integrated in the PCM, replacing the BARO sensor includes replacement of the PCM.

  1. Remove the PCM. (See «PCM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579389-S19128577092013100700000) .)

THROTTLE POSITION (TP) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

Note. The TP sensor cannot be removed as a single unit. When replacing the TP sensor, replace it together with the throttle body as a single unit.

  1. Remove the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579361-S37454927402013100700000) .)

ACCELERATOR PEDAL POSITION (APP) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

Note. Because the APP sensor is integrated in the accelerator pedal, replacing the APP sensor includes replacement of the accelerator pedal.

  1. Remove the accelerator pedal. (See «ACCELERATOR PEDAL REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579361-S18591268542013100700000) .)

AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

WARNINGA hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

Scheme 27

Scheme 27
Scheme 27
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Remove the plug hole plate. (See «PLUG HOLE PLATE REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579359-S03753736432013100700000).)
  4. Remove the air cleaner assembly. (MZR 2.5) (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579361-S37454927402013100700000).)
  5. Disconnect the A/F sensor connector.
  6. Remove the A/F sensor using the SST. (Scheme 27): A/F Sensor And SST With Torque Specifications
  7. Install in the reverse order of removal.

Scheme 28

Scheme 28: A/F Sensor Inspection
Scheme 28: A/F Sensor Inspection

Scheme 29

Scheme 29
Scheme 29
  1. Connect the M-MDS to the DLC-2. (Scheme 28): Identifying DLC-2 Location
  2. Switch the ignition to ON.
  3. Warm up the engine to normal operating temperature.
  4. Access the following PIDs using the M-MDS. (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.0, MZR 2.5]»(ref-579388-S13095199182013100700000).) VSS (Vehicle speed) RPM (Engine speed) O2S11 (A/F sensor output current)
  5. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 rpm or more.
  6. Verify that the A/F sensor output current (PID: O2S11) is 0.25 mA or more while decelerating as shown in the figure. (Scheme 29): A/F Sensor Output Current Graph If not as specified, replace the A/F sensor. (See «AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579389-S33851902052013100700000).)

HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

WARNINGA hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

Scheme 30

Scheme 30
Scheme 30

Scheme 31

Scheme 31
Scheme 31
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Disconnect the HO2S connector.
  4. Remove the HO2S using the SST. (Scheme 30): Removing HO2S Using SST - MZR 2.0/MZR 2.5 (Mexico) With Torque Specifications (Scheme 31): Removing HO2S Using SST - MZR 2.5 (Except Mexico) With Torque Specifications
  5. Install in the reverse order of removal.

Scheme 32

Scheme 32: HO2S Inspection
Scheme 32: HO2S Inspection

Scheme 33

Scheme 33
Scheme 33
  1. Connect the M-MDS to the DLC-2. (Scheme 32): Identifying DLC-2 Location
  2. Switch the ignition to ON.
  3. Warm up the engine to normal operating temperature.
  4. Access the following PIDs using the M-MDS. (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.0, MZR 2.5]»(ref-579388-S13095199182013100700000).) VSS (Vehicle speed) RPM (Engine speed) O2S12 (HO2S output voltage)
  5. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 rpm or more.
  6. Verify that the HO2S outputs a voltage of 0.6 V or more, one time or more, then verify that the HO2S voltage (PID: O2S12) is 0.3 V or less while decelerating as shown in the figure. (Scheme 33): HO2S Outputs Voltage Graph If not as specified, replace the HO2S. (See «HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579389-S35538691142013100700000).)

Removal

CAUTIONWhen foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect the engine control. Be sure there is no foreign material on the CKP sensor when replacing. Do not assemble the CKP sensor or change the installation position using any method other than the following. Otherwise, it could negatively affect engine controls, such as the ignition timing and fuel injection.

Scheme 34

Scheme 34
Scheme 34
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Perform the following procedure for easier access. Remove the aerodynamic under cover No.2. (See «AERODYNAMIC UNDER COVER NO.2 REMOVAL/INSTALLATION»(ref-579341-S33007366072013100700000).) Remove the front splash shield (RH). (See «SPLASH SHIELD REMOVAL/INSTALLATION»(ref-579341-S13061542712013100700000).)
  4. Disconnect the CKP sensor connector.
  5. Remove the CKP sensor. (Scheme 34): Identifying CKP Sensor

Installation

CAUTIONWhen foreign material such as an iron chip is on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect the engine control. Be sure there is no foreign material on the CKP sensor when replacing. Do not assemble the CKP sensor or change the installation position using any method other than the following. Otherwise, it could negatively affect engine controls, such as the ignition timing and fuel injection.

Scheme 35

Scheme 35
Scheme 35

Scheme 36

Scheme 36
Scheme 36

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38
  1. Perform the following procedure so that cylinder No.1 is at TDC. Remove the wheel and tire (front right side). Disconnect the drive shaft (RH) from joint shaft, set the drive shaft (RH) out of the way. (MTX) (See «DRIVE SHAFT REMOVAL/INSTALLATION»(ref-579369-S23568427752013100700000).) Remove the cylinder block lower blind plug and install the SST (Scheme 35): Identifying SST 303-507 Rotate the crankshaft pulley clockwise until the crank weight contacts the SST so that cylinder No.1 is at TDC.
  2. Fit the center of the CKP sensor with the fifth tooth (counting counterclockwise from the empty space A as shown in the figure) of the pulse wheel. (Scheme 36): Identifying CKP Sensor Installation With Reference Of Pulse Wheel CAUTION: If the line is not accurately drawn, ignition timing, fuel injection and other engine control systems will be adversely effected. Draw the straight line carefully using a straight edge.
  3. Align the center line of the CKP sensor and the line drawn in Step 2, then install the sensor.
  4. Install the CKP sensor fitting bolts. (Scheme 37): Identifying CKP Sensor Fitting Bolts With Torque Specifications
  5. Remove the SST then install the cylinder block lower blind plug. (Scheme 38): Identifying Cylinder Block Lower Blind Plug And CKP Sensor With Torque Specifications
  6. Install the drive shaft (RH). (MTX) (See «DRIVE SHAFT REMOVAL/INSTALLATION»(ref-579369-S23568427752013100700000).)
  7. Install the wheel and tire (front right side).

CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

CAUTIONWhen replacing the CMP sensor, make sure there is no foreign material on it such as metal shavings. If it is installed with foreign material, the sensor output signal will malfunction resulting from fluctuation in magnetic flux and cause a deterioration in engine control.

Scheme 39

Scheme 39
Scheme 39
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Remove the plug hole plate. (See «PLUG HOLE PLATE REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579359-S03753736432013100700000).)
  4. Disconnect the CMP sensor connector.
  5. Remove the CMP sensor. (Scheme 39): Identifying CMP Sensor And Bolt With Torque Specifications
  6. Install in the reverse order of removal.

FUEL TANK PRESSURE SENSOR REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]

CAUTIONDisconnecting/connecting the quick release connector without cleaning it may cause damage to the evaporative pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting using a cloth or soft brush, and make sure that it is free of foreign material.

Note. The fuel tank pressure sensor cannot be removed as a single unit. When replacing the fuel tank pressure sensor, replace it together with the evaporative hose component as a single unit.

Scheme 40

Scheme 40
Scheme 40

Scheme 41

Scheme 41
Scheme 41
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579330-S31782573982013100700000).)
  3. Disconnect the fuel tank pressure sensor connector.
  4. Remove the clip from the fuel tank pressure sensor bracket. (Scheme 40): Identifying Clip And Fuel Tank Pressure Sensor Bracket
  5. Disconnect the quick release connectors and remove the evaporative hose component. (See «QUICK RELEASE CONNECTOR (EMISSION SYSTEM) REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5]»(ref-579418-S38934674082013100700000).) (Scheme 41): Evaporative Hose Component
  6. Install in the reverse order of removal.

More articles — Engine Control System [Mzr 2.0, Mzr 2.5]