DTC P0231 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
z
Has FREEZE FRAME DATA been
recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on the
repair order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
z
Verify related Service Bulletins
availability.
z
Is any related Service Bulletins
available?
Yes
Perform repair or diagnosis according to
available Service Bulletins.
z
If vehicle is not repaired, go to the
next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE
OR STORED DTC
z
Verify the related PENDING
CODE or stored DTCs.
z
Are other DTCs present?
Yes
Go to appropriate DTC inspection.
(See
DTC TABLE [MZI-3.5]
.)
No
Go to the next step.
4
INSPECT FUEL PUMP RELAY
CONNECTOR FOR POOR
CONNECTION
z
Turn the ignition switch off.
z
Disconnect the fuel pump relay.
z
Inspect for poor connection (such as
damaged/pulled-out pins,
corrosion).
z
Are there malfunction?
Yes
Repair or replace suspected part, then go
to Step 9.
No
Go to the next step.
5
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
z
Turn the ignition switch off.
z
Disconnect PCM connector.
z
Inspect for poor connection (such as
damaged/pulled-out pins,
corrosion).
z
Are there malfunction?
Yes
Repair or replace suspected part, then go
to Step 9.
No
Go to the next step.
6
INSPECT FUEL PUMP RELAY
POWER SUPPLY CIRCUIT FOR
OPEN CIRCUIT
z
Turn the ignition switch to the ON
Yes
Go to the next step.
No
Repair or replace suspected part, then go
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:31 AM
Page 152
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