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
or more or there is no downstream HO2S inversion, the TWC is functioning properly.
the TWC is not functioning properly. Replace the TWC.
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)
Mazda 6 Service Manual: Tire Pressure Monitoring System
The Tire Pressure Monitoring System (TPMS) monitors the air pressure of all four
tires. If the air pressure of one or more tires is too low, the system warns the
driver by indicating the tire pressure monitoring system warning light in the instrument
cluster and operating a beep sound. The sys ...
Mazda 6 Service Manual: Fuel-filler lid and opener removal/installation
1. To remove the fuel-filler lid opener, remove the left side trunk side trim
(4SD) or trunk side lower trim (5HB).
2. To remove the fuel-filler lid opener cable, perform the following and turn
over the floor covering.
(1) Remove the driver-side front seat.
(2) Remove the driver-side fron ...