Mazda MX-3 silhouetteMX-3

CRANKSHAFT POSITION SENSOR / CAMSHAFT POSITION SENSOR (IN DISTRIBUTOR)

F2-153prose procedure

CONTROL SYSTEM

CRANKSHAFT POSITION SENSOR

Inspection

Crankshaft Position Sensor Inspection

  1. 1
    Disconnect the crankshaft position sensor connector.
    Crankshaft position sensor connector. Engine-bay view with a multimeter probing the connector terminals; the connector is shown enlarged at lower right with terminals labeled a, b, c.
  2. 2
    Measure the resistance between terminals A and B.
  3. 3
    Replace the crankshaft position sensor if not as specified.
Resistance20°C {68°F}
520-580Ω

Removal / Installation

Crankshaft Position Sensor Removal / Installation

  1. 1
    Disconnect the negative battery cable.
  2. 2
    Remove the idler pulley bracket.
    Idler pulley bracket and surrounding accessory drive area with tightening-torque callouts for two bolt locations.
  3. 3
    Remove the dipstick pipe.
  4. 4
    Remove the crankshaft position sensor.
  5. 5
    Install in the reverse order of removal.
  6. 6
    Adjust the drive belt deflection. (Refer to section B2.)

CAMSHAFT POSITION SENSOR (IN DISTRIBUTOR)

Inspection

Camshaft Position Sensor (In Distributor) Inspection

  1. 1
    Remove the distributor. (Refer to section G.)
  2. 2
    Verify that the distributor connector (3-pin) is disconnected.
  3. 3
    Connect the distributor connector (6-pin) as shown in the figure.
    Distributor and camshaft position sensor mounting area shown in the engine bay, illustrating the distributor connector.
  4. 4
    Disconnect the fuel injector connector.
  5. 5
    Turn the ignition switch ON.
  6. 6
    Connect the SSTs (Engine Signal Monitor and Adapter Harness) to the ECM.
  7. 7
    Rotate the distributor drive by hand and measure the output voltage.
    Distributor with an arrow indicating the direction to rotate the distributor drive by hand during the output voltage measurement.

Specification

Output Voltage Specification

3E (SGT signal)
VoltageApprox. 5V (6 pulses)
3G (SGC signal)
VoltageApprox. 5V (1 pulse)

Camshaft Position Sensor Inspection (continued)

  1. 8
    After the inspection, install the distributor. (Refer to section G.)
  2. 9
    Start the engine and adjust the ignition timing. (Refer to page F2-70.)
  3. 10
    Tighten the distributor lock bolts to the specified torque.
Ignition timing
BTDC 9-11°{10 ± 1°}
distributor lock bolts
19 - 25N·m
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See also

section B2section Gpage F2-70

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