Mazda CX-5 Service & Repair Manual: Air Fuel Ratio (A/F) Sensor Inspection
A/F Sensor Inspection
1. Connect the M-MDS to the DLC?2.
2. Switch the ignition ON (engine on).
3. Warm up the engine to normal operating temperature.
4. Access the following PIDs using the M-MDS..
-
VSS (Vehicle speed)
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RPM (Engine speed)
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O2S11 (A/F sensor output current)
5. Drive the vehicle and decelerate the engine speed by releasing the accelerator pedal fully when the engine speed is 3,000 rpm or more
.
6. Verify that the A/F sensor output current (PID: O2S11) is 0.25 mA or more
while decelerating as shown in the figure.
-
If not as specified, replace the A/F sensor..
A/F Sensor Heater Inspection
WARNING:
-
A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.
1. Disconnect the negative battery cable..
2. Disconnect the A/F sensor connector.
3. Measure the resistance between A/F sensor terminals A and E.
-
If not as specified, replace the A/F sensor..
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A/F sensor heater resistance
-
1—10 ohms [normal temperature]
Air Fuel Ratio (A/F) Sensor Heater Control
Outline
Based on the control of the A/F sensor heater, a stabilized oxygen concentration
is detected even at low exhaust temperatures, and feedback control of fuel injection
even at cold ...
Air Fuel Ratio (A/F) Sensor Removal/Installation
WARNING:
A hot engine and exhaust system can cause severe burns. Turn off the engine
and wait until they are cool before removing the exhaust system.
CAUTION:
Do not allow fla ...
Other materials:
Intake Air Temperature (Iat) Sensor
IAT Sensor No.1
Purpose/Function
Detects the IAT before it passes through the throttle body as basic information
for mainly determining the fuel injection amount.
Detects the IAT before it passes through the throttle body and inputs it
to the PCM as an IAT signal.
Constru ...
Oil Seal (Side Gear) Replacement
1. Remove the drain plug and the drain differential oil into a container.
2. Install a new washer and the drain plug, and tighten.
3. Remove the rear drive shaft..
4. Remove the clip from the drive shaft.
CAUTION:
Wrap the end of a screwdriver with cloth to prevent scratches to the i ...
Rear Sash Molding Removal
WARNING:
Using a utility knife with bare hands can cause injury. Always wear gloves
when using a utility knife.
1. Remove the rear door garnish. (rear side).
2. Remove the double-sided adhesive tape in the position shown in the figure
using the utility knife.
CAUTION:
...
