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Engine Control System (L3): Removal & Installation Mazda 5 I

Testing & Diagnostics 5 illustrations ~315 words

Removal

  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [L3]»(ref-244326-S41790335602006092100000) ).
  2. Disconnect the negative battery cable.
  3. Remove the plug hole cover.
  4. Perform the following procedure for easier access. Remove the front tire (RH). Remove the splash shield.
  5. Disconnect the CKP sensor connector.
  6. Remove the installation bolt and remove the CKP sensor.

Installation

CAUTIONWhen replacing the CKP 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. Do not install the CKP sensor using any method except for the following, or do not change the installation position. It might cause a deterioration in engine control for ignition timing and fuel injection.

Scheme 56

Scheme 56
Scheme 56

Scheme 57

Scheme 57
Scheme 57
  1. Perform the following procedure so that cylinder No. 1 is at TDC. Remove the cylinder block lower blind plug and install the SST . Rotate the crankshaft pulley clockwise until the crank weight contacts the SST so that cylinder No. 1 is at TDC.
  2. Mark the center line on the pulse wheel teeth of the crankshaft pulley (9th tooth counting counterclockwise from the empty space) using a ruler. CAUTION: An inaccurately placed center line will cause improper installation resulting in a deterioration in engine control for ignition timing and fuel injection. Mark the center line carefully.
  3. Install the CKP sensor where the center line marked in Step 2 and the CKP sensor center line are aligned.
  4. Tighten the CKP sensor installation bolt. Tightening torque 5.5-7.5 N.m {57-76 kgf.cm, 49-66 in.lbf}
  5. Remove the SST and install the blind plug. Tightening torque 18-22 N.m {1.9-2.2 kgf.cm, 14-16 ft.lbf}

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

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 58

Scheme 58
Scheme 58
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [L3]»(ref-244326-S41790335602006092100000) ).
  2. Disconnect the negative battery cable.
  3. Remove the plug hole cover.
  4. Disconnect the HO2S connector.
  5. Remove in the order indicated in the table. HO2S REFERENCE CHART 1 Front HO2S (See «HO2S REMOVAL NOTE»(ref-244330-S17417708742006092100000) ). 2 Wiring harness bracket (See «WIRING HARNESS BRACKET INSTALLATION NOTE»(ref-244330-S00530383462006092100000) ). 3 Rear HO2S (See «HO2S REMOVAL NOTE»(ref-244330-S17417708742006092100000) ).

Scheme 59

Scheme 59: HO2S Removal Note
Scheme 59: HO2S Removal Note
  1. Remove the HO2S using the SST .

Wiring Harness Bracket Installation Note

Note. There might be no pin. If there is no pin, lock the wiring harness bracket against rotation and tighten the nut.

Scheme 60

Scheme 60: Wiring Harness Bracket Installation Note
Scheme 60: Wiring Harness Bracket Installation Note

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