Mazda CX-5 Service & Repair Manual: Heated Oxygen Sensor (HO2 S) Inspection
HO2S 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)
-
RPM (Engine speed)
-
O2S12 (HO2S output voltage)
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 HO2S output voltage (PID: O2S12) is 0.3 V or less
while decelerating as shown in the figure.
-
If not as specified, replace the HO2S..
HO2S 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. Lift up the vehicle.
3. Remove the floor under cover. (vehicles with floor under cover).
4. Disconnect the HO2S connector.
5. Measure the resistance between HO2S terminals C and D.
-
If not as specified, replace the HO2S..
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HO2S heater resistance
-
2—50 ohms [normal temperature]
Heated Oxygen Sensor (HO2 S) Heater Control
Outline
Based on the control of the HO2S heater, a stabilized oxygen concentration
is detected even at low exhaust temperatures, and feedback control of fuel injection
even at cold engine ...
Heated Oxygen Sensor (HO2 S) 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:
Rear ABS Wheel Speed Sensor Inspection [2 Wd]
Installation Visual Inspection
1. Inspect the following items:
If there is any malfunction, replace the applicable part.
a. Excessive play of the ABS wheel-speed sensor
b. Deformation of the ABS wheel-speed sensor
Clearance Inspection
1. Remove the ABS wheel-speed sensor.
2. M ...
Automatic Transaxle Shift Mechanism [Fw6 A EL, Fw6 Ax EL]
Outline
A sport AT-type shift mechanism has been adopted for all models.
An electric shift-lock system has been adopted to prevent driver mis-operation.
A manual shift-lock release system has been adopted to ensure emergency bypass
if shifting operations cannot be performed ...
Keyless Antenna Removal/Installation
With Advanced Keyless Entry System
Vehicle interior, front
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Decoration panel.
b. Shift lever knob (MTX).
c. Front console box.
d. Shift panel.
e. Upper panel.
f. Rear console.
g. Side wall.
h. Front conso ...
