Mazda CX-9 Grand Touring 2009 Manual page 1280

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
VERIFY TROUBLESHOOTING OF
DTC P2196, P2198 HAS BEEN
COMPLETED
Verify that all disconnected
connectors are reconnected.
Turn the ignition switch to the ON
position (Engine off).
Clear the DTC from the PCM
11
memory using the M-MDS.
Perform no load racing at the engine
speed of 2,500-3,500 rpm for 60s or
more, then idle the engine for 60s or
more.
Perform KOEO and KOER self-test.
Retrieve DTCs using the M-MDS.
Is the PENDING CODE for this
DTC present?
VERIFY AFTER REPAIR
PROCEDURE
Perform "AFTER REPAIR
12
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-
3.7].)
Are any DTC present?
DTC P2270, P2272 [MZI-3.7]
DTC P2270, P2272 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P2270 P2270: Rear HO2S (RH) signal stuck lean
DTC P2272 P2272: Rear HO2S (LH) signal stuck lean
DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC P2270, P2272 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
VERIFY FREEZE FRAME DATA HAS
2008 Mazda CX-9 Grand Touring
The downstream HO2S is forced rich and monitored by the PCM. The test
fails if the PCM does not detect the output of the HO2S in a calibrated
amount of time
Rear HO2S malfunction
Leakage exhaust gas
INSPECTION
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.
ACTION