Mazda CX-9 Grand Touring 2007 Manual page 436

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Disconnect all the PCM
connectors.
Visually inspect for:
Pushed out pins
Corrosion
Connect all the PCM connectors
and verify that they seat correctly.
9 VERIFY TROUBLESHOOTING OF
MISFIRE DTC 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
memory using the M-MDS.
Start the engine and run it at idle.
Retrieve DTCs using the M-MDS.
Is the PENDING CODE for this
DTC present?
10 VERIFY AFTER REPAIR
PROCEDURE
Perform "AFTER REPAIR
PROCEDURE".
(See AFTER REPAIR
PROCEDURE [MZI-3.5].)
Are any DTC present?
DTC P0133, P0139, P0153, P0159 [MZI-3.5]
DTC P0133, P0139, P0153, P0159 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES
DTC P0133 P0133: Front HO2S (RH) circuit slow response
DTC P0139 P0139: Rear HO2S (RH) circuit slow response
DTC P0153 P0153: Front HO2S (LH) circuit slow response
DTC P0159 P0159: Rear HO2S (LH) circuit slow response
DETECTION
CONDITION
2007 Mazda CX-9 Grand Touring
The HO2S monitor checks the HO2S frequency and amplitude.
The test fails if the frequency and amplitude fall below a calibrated limit
during testing.
No Repair if necessary. Then go to the next
step.
Yes Replace PCM, then go to the next step.
(see PCM
REMOVAL/INSTALLATION [MZI-
3.5] .)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.5].)
No Troubleshooting completed.