Mazda CX-9 Grand Touring 2007 Manual page 499

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