Mazda CX-9 Grand Touring 2009 Manual page 1109

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Remove air cleaner element with the
4 engine running.
Is the engine speed increased?
INSPECT INTAKE AIR SYSTEM FOR
EXCESSIVE AIR SUCTION
5
Visually inspect the hose in intake air
system for looseness or damages.
Is there any malfunction?
INSPECT THROTTLE BODY
PASSAGE
6
Is the throttle body clogged?
VERIFY TROUBLESHOOTING OF
DTC P0507 HAS BEEN COMPLETED
Verify that all disconnected
connectors reconnected.
Start the engine.
7
Clear the DTC from the PCM memory
using the M-MDS.
Depress brake pedal for 14 s or more.
Is PENDING CODE for this DTC
present?
VERIFY AFTER REPAIR
PROCEDURE
Perform the "AFTER REPAIR
8
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTC present?
DTC P050E [MZI-3.7]
DTC P050E (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P050E Cold start engine exhaust temperature out of range
DETECTION
CONDITION
2008 Mazda CX-9 Grand Touring
The PCM calculates the actual catalyst warm up temperature during a cold start.
The PCM then compares the actual temperature to the expected catalyst
temperature model. The difference between the actual and expected temperatures
is a ratio. When this ratio exceeds the calibrated value this DTC is set and the
malfunction indicator lamp (MIL) illuminates.
Intake air restriction
Yes 7.
No Go to the next step.
Repair or replace the malfunctioning part, then
Yes
go to Step 7.
No Go to the next step.
Clean or replace the throttle body passage, then
Yes
go to Step 7.
No Go to the next step.
Replace the PCM, then go to the next step. (See
Yes PCM REMOVAL/INSTALLATION [MZI-
3.7] .)
No Go to the next step.
Go to the applicable DTC inspection. (See DTC
Yes
TABLE [MZI-3.7].)
No Troubleshooting completed.