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Engine Control System (L3 with TC): Removal & Installation Mazda 3 BK рестайлинг

Testing & Diagnostics 8 illustrations ~628 words

PCM REMOVAL/INSTALLATION [L3 WITH TC]

Note. For PCM replacement, set up the M-MDS and perform the PCM configuration. (See PCM CONFIGURATION [L3 WITH TC] ).

Scheme 153

Scheme 153: PCM REMOVAL/INSTALLATION [L3 WITH TC]
Scheme 153: PCM REMOVAL/INSTALLATION [L3 WITH TC]
  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Disconnect the PCM connector.
  4. When replacing the PCM on the vehicles, perform the following. PCM parameter reset (See «IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING»(ref-274461-S08673844452007121800000) .)
  5. Install in the reverse order of removal.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [L3 WITH TC]

WARNINGA hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing the ECT sensor.

Scheme 154

Scheme 154
Scheme 154
  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Remove the battery and battery tray. (See «BATTERY REMOVAL/INSTALLATION [L3 WITH TC]»(ref-274436-S09884163992007121800000) .)
  4. Remove the air cleaner and air hose. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3 WITH TC]»(ref-274433-S08887991872007121800000) .)
  5. Drain the engine coolant. (See «COOLING SYSTEM SERVICE WARNINGS [L3 WITH TC]»(ref-274432-S04658655282007121800000) .)
  6. Disconnect the wiring harness.
  7. Remove the ECT sensor.
  8. Install in the reverse order of removal. Tightening torque 10-14 N.m {102-142 kgf.cm, 89-123 in.lbf}
  9. Refill the engine coolant. (See «COOLING SYSTEM SERVICE WARNINGS [L3 WITH TC]»(ref-274432-S04658655282007121800000) .)

FUEL PRESSURE SENSOR REMOVAL/INSTALLATION [L3 WITH TC]

Note. If the fuel pressure sensor is removed, do not reuse the fuel pressure sensor and the fuel delivery pipe. When you replace the fuel pressure sensor, replace a new fuel delivery pipe with a new fuel pressure sensor. (See FUEL INJECTOR REMOVAL/INSTALLATION [L3 WITH TC] .)

HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [L3 WITH TC]

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 155

Scheme 155
Scheme 155
  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Remove in the order indicated in the table.
  4. Install in the reverse order of removal.

Scheme 156

Scheme 156: HO2S Removal Note
Scheme 156: HO2S Removal Note
  1. Remove the HO2S using the SST.

Removal

  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Remove the under cover.
  4. Remove the splash shield (RH).
  5. Disconnect the CKP sensor connector.
  6. Remove the installation bolts to remove the CKP sensor.

Installation

CAUTIONWhen foreign material, such as an iron chips, gets on the CKP sensor, it can cause abnormal output from the sensor because of flux turbulence and adversely affect engine control. Be sure there is no foreign material on the CKP sensor when replacing.

Scheme 157

Scheme 157
Scheme 157

Scheme 158

Scheme 158
Scheme 158
  1. Perform the following procedure so that piston No.1 is at the top dead center. Rotate the crankshaft in the direction of the engine rotation and remove the cylinder block lower blind plug when the No. 1 cylinder is at the point prior to top dead center (TDC) of compression, then install the SST. Rotate the crankshaft in the direction of the engine rotation so that the No.1 piston is at TDC of the compression stroke. (Until the crank weight contacts SST and stops.)
  2. Using a straight edge, draw a straight line directly in the center of the twentieth tooth of the crankshaft pulley pulse wheel (counting counterclockwise from the empty space). 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 crankshaft position sensor and the line drawn in Step 2 , then install the sensor.
  4. Install the CKP sensor fitting bolts. Tightening torque 5.5-7.5 N.m {57-76 kgf.cm, 49-66 in.lbf}
  5. Remove the SST then install the cylinder block lower blind plug. Tightening torque 18-22 N.m {1.9-2.2 kgf.m, 14-16 ft.lbf}

CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 WITH TC]

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 159

Scheme 159
Scheme 159
  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Remove the charge air cooler. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3 WITH TC]»(ref-274433-S08887991872007121800000) .)
  4. Disconnect the CMP sensor connector.
  5. Remove the CMP sensor installation bolt.
  6. Remove the CMP sensor from the cylinder head cover.
  7. Install in the reverse order of removal. Tightening torque 5.5-7.5 N.m {57-76 kgf.cm, 49-66 in.lbf}

KNOCK SENSOR (KS) REMOVAL/INSTALLATION [L3 WITH TC]

CAUTIONBe careful not to impact the sensor. Verify that there is no debris between the sensor and the cylinder block before installing.

Scheme 160

Scheme 160
Scheme 160
  1. Remove the battery cover.
  2. Disconnect the negative battery cable.
  3. Remove the intake manifold. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3 WITH TC]»(ref-274433-S08887991872007121800000) )
  4. Remove the KS attachment bolt to remove the KS.
  5. Install in the reverse order of removal. Tightening torque 16-24 N.m {1.7-2.4 kgf.m, 12-17 ft.lbf}

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