Mazda 3 Service Manual: Crankshaft Position (CKP) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]

Mazda 3 Service Manual / Engine / Control / Sensors, Switches, Relays / Crankshaft Position (CKP) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]

Removal

CAUTION:

When 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.

1. Remove the battery cover..

2. Disconnect the negative battery cable..

3. Perform the following procedure for easier access.

a. Remove the aerodynamic under cover No.2..

b. Remove the front splash shield (RH)..

4. Disconnect the CKP sensor connector.

5. Remove the CKP sensor.

Installation

CAUTION:

When 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.

1. Perform the following procedure so that cylinder No.1 is at TDC.

a. Remove the wheel and tire (front right side).

b. Disconnect the drive shaft (RH) from joint shaft, set the drive shaft (RH) out of the way. (MTX).

c. Remove the cylinder block lower blind plug and install the SST

d. 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.

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.

5. Remove the SST

then install the cylinder block lower blind plug.

6. Install the drive shaft (RH). (MTX).

7. Install the wheel and tire (front right side).

Crankshaft Position (CKP) Sensor Inspection [Mzr 2.0, Mzr 2.5]

Visual Inspection CAUTION: When 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 ...

Engine Coolant Temperature (ECT) Sensor Inspection [Mzr 2.0, Mzr 2.5]

ECT Sensor No.1 Resistance inspection WARNING: When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor. 1. Remove the ...

Other materials:

Event Data Recorder
This vehicle is equipped with an event data recorder (EDR). The main purpose of an EDR is to record, in certain crash or near crash-like situations, such as an air bag deployment or hitting a road obstacle, data that will assist in understanding how a vehicle’s systems performed. The EDR is ...

Front Seat Belt Pretensioner and Load Limiting Systems
For optimum protection, the driver and front passenger seat belts are equipped with pretensioner and load limiting systems. For both these systems to work properly you must wear the seat belt properly. Pretensioners: When a collision is detected, the pretensioners deploy simultaneously wit ...

Operational Range
The system operates only when the driver is in the vehicle or within operational range while the key is being carried. Starting the Engine NOTE Starting the engine may be possible even if the key is outside of the vehicle and extremely close to a door and window, however, always start ...