Mazda 6 manuals

Mazda 6 Service Manual: Three-way catalytic converter (twc) inspection

Mazda 6 Service Manual / Fuel and emission control systems / Emission system / Three-way catalytic converter (twc) inspection

Note

1. Connect the WDS or equivalent and monitor PIDs as following.

2. Begin to monitor the appropriate PIDs.

3. Drive the vehicle for 10 min at 65-96 km/h {40-60 mph}

to allow the front catalytic converter to reach operating temperature.

4. Stop the vehicle and leave it in a safe place.

5. Let the engine idle.

6. Record PIDs for 1 min.


7. Select the appropriate PIDs and read the graph.

8. Count the number of times (inversions) that the upstream HO2S graph line actually crosses the 0.5 V

line.

9. Count the number of times (inversions) that the downstream HO2S graph line actually crosses the 0.5 V

line.

Note

10. Using the following equation, calculate the value of ratio.

Equation
RATIO = Upstream HO2S inversion ÷ downstream HO2S inversion

Upstream HO2S graph line example


Downstream HO2S graph line example 1

Equation
RATIO = 30 inversions (upstream HO2S inversions) ÷ 5 inversions (downstream HO2S inversions) = 6.0 (good WU-TWC)


Downstream HO2S graph line example 2


Downstream HO2S graph line example 3

Equation
RATIO = 30 inversions (upstream HO2S inversions) ÷ 27 inversions (downstream HO2S inversions) = 1.1 (bad converter)


Pcv valve inspection
1. Disconnect the negative battery cable. 2. Remove the intake maniforld.(see INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.) 3. Remove the PCV valve. 4. Blow through the valve and verify that air flows a ...

Control system
...

Other materials:

Mazda 6 Service Manual: Headlight aiming
Low-beam 1. Set up a screen as shown in the figure below for aiming the headlights. 2. Adjust the tire air pressure to the specification. 3. Position the unloaded vehicle on a flat, level surface. 4. Seat one person in the driver's seat. 5. Position the vehicle straight ahead and perpendicu ...

Mazda 6 Service Manual: Front buckle removal/installation
1. Perform the following procedure for vehicles with seat belt warning. (1) Disconnect the negative battery cable. (2) Remove the front seat. (3) Disconnect the buckle switch connector. 2. Perform the following procedure for vehicles without seat belt warning. (1) Remove the console. ...

© 2016-2025 Copyright www.mazda6info.net