Mazda CX-9 Grand Touring 2009 Manual page 907

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Perform the "AFTER REPAIR
PROCEDURE".
7
(See AFTER REPAIR PROCEDURE
[MZI-3.7].)
Are any DTCs present?
DTC P0040, P0041 [MZI-3.7]
DTC P0040, P0041 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0040 P0040: Front HO2S (LH/RH) signals swapped
DTC P0041 P0041: Rear HO2S (LH/RH) signals swapped
DETECTION
CONDITION
POSSIBLE CAUSE
DTC P0040, P0041 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
2
Verify related Service Bulletins and/or on-
line repair information availability.
Is any related Service Bulletins available?
INSPECT HO2S WIRING HARNESS
CONNECTORS
For P0040, visually inspect the vehicle
3
front HO2S wiring harness connector (s) for
any indication of crossed wires (Also,
stretched or incorrectly mounted wiring
harnesses).
For P0041, visually inspect the vehicle rear
2008 Mazda CX-9 Grand Touring
P0040 indicates that during KOER testing, the front HO2S signal(s)
response for a fuel shift to the correct engine bank was not indicated.
P0041 indicates that during KOER testing, the rear HO2S signal(s)
response for a fuel shift to the correct engine bank was not indicated.
Crossed HO2S harness connectors.
Crossed wiring at HO2S harness connectors.
Crossed wiring at PCM harness connector.
INSPECTION
Go to the applicable DTC inspection. (See
Yes
DTC TABLE [MZI-3.7].)
No Troubleshooting completed.
ACTION
Yes Go to the next step.
Record FREEZE FRAME DATA on the
No
repair order, then go to the next step.
Perform repair or diagnosis according to
the available Service Bulletins.
Yes
If the vehicle is not repaired, go to
the next step.
No Go to the next step.
Yes Repair if necessary.