Mazda CX-5 Service & Repair Manual: Camshaft Position (CMP) Sensor Inspection
Intake CMP Sensor
Visual inspection
CAUTION:
-
When 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.
1. Remove the intake CMP sensor..
2. Verify that there are no metal shavings on the intake CMP sensor.
-
If there is a malfunction, remove any metal shavings that are adhering.
Voltage inspection
CAUTION:
-
When 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.
-
If the wiring harnesses or waterproof connectors are damaged, water penetrating the connector will cause a sensor malfunction. To prevent this, be careful not to damage wiring harnesses or waterproof connectors.
1. Idle the engine.
2. Measure the intake CMP sensor output voltage using the oscilloscope.
-
If not as specified, replace the intake CMP sensor..
|
Terminal |
Voltage (V) |
Condition |
|
A |
Above 4.8 |
High output* |
|
Below 0.8 |
Low output* |
|
|
B |
Below 1.0 |
Under any condition |
|
C |
B+ |
Under any condition |
* Output voltage varies with camshaft rotation.
Exhaust CMP Sensor
Visual inspection
CAUTION:
-
When 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.
1. Remove the exhaust CMP sensor..
2. Verify that there are no metal shavings on the exhaust CMP sensor.
-
If there is a malfunction, remove any metal shavings that are adhering.
Voltage inspection
CAUTION:
-
When 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.
-
If the wiring harnesses or waterproof connectors are damaged, water penetrating the connector will cause a sensor malfunction. To prevent this, be careful not to damage wiring harnesses or waterproof connectors.
1. Idle the engine.
2. Measure the exhaust CMP sensor output voltage using the oscilloscope.
-
If not as specified, replace the exhaust CMP sensor..
|
Terminal |
Voltage (V) |
Condition |
|
A |
Above 4.8 |
High output* |
|
Below 0.8 |
Low output* |
|
|
B |
Below 1.0 |
Under any condition |
|
C |
B+ |
Under any condition |
* Output voltage varies with camshaft rotation.
Air Fuel Ratio (A/F) Sensor
Purpose/Function
Detects the oxygen concentration (all-range air/fuel ratio) in the exhaust
gas as basic information for mainly determining the fuel injection amount.
Detects the oxy ...
Camshaft Position (CMP) Sensor Removal/Installation
CAUTION:
When 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 malfu ...
Other materials:
Sae Standards
In accordance with new regulations, SAE (Society of Automotive Engineers)
standard names and abbreviations are now used in this manual. The table below
lists the names and abbreviations that have been used in Mazda manuals up to
now and their SAE equivalents.
...
Emission System
Purpose, Outline
A single-nano catalyst has been adopted for the under-floor, three-way catalyst
to improve emission gas purification efficiency.
Structural View
Engine compartment side
Exhaust system side
2WD
AWD
Fuel tank side
U.S.A. and CANADA (2WD)
U.S.A. a ...
Front Oil Seal Replacement
WARNING:
A hot engine can cause severe burns. Turn off the engine and wait until it
is cool before servicing.
1. Remove the front under cover No.2..
2. Remove the splash shield..
3. Remove the drive belt..
4. Remove in the order indicated in the table.
5. Install in the reve ...
