Mazda CX-9 Grand Touring 2009 Manual page 1010

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
INSPECTION .)
Is there any malfunction?
VERIFY TROUBLESHOOTING OF DTC P0231
HAS BEEN COMPLETED
Verify that all disconnected connectors
reconnected.
9
Clear DTC from memory using M-MDS.
Start the engine.
Perform the "KOEO/KOER self-test" (See
KOEO/KOER SELF TEST [MZI-3.7].)
Is same DTC present?
VERIFY AFTER REPAIR PROCEDURE
Perform the "AFTER REPAIR PROCEDURE".
10
(See AFTER REPAIR PROCEDURE [MZI-
3.7].)
Are any DTCs present?
DTC P0232 [MZI-3.7]
DTC P0232 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DTC P0232 FP secondary circuit high
DETECTION
CONDITION
POSSIBLE
CAUSE
2008 Mazda CX-9 Grand Touring
The PCM monitors the fuel pump monitor circuit. This test fails when the PCM detects
voltage on the fuel pump monitor circuit while the fuel pump is commanded OFF. The
fuel pump monitor circuit is wired to a pull-up voltage inside the PCM. The fuel pump
monitor circuit goes high if, with the key ON, engine OFF and the fuel pump
commanded OFF, the fuel pump monitor/fuel pump power circuit loses its path to
ground through the fuel pump. The fuel pump monitor circuit also goes high if the fuel
pump monitor/fuel pump power circuit is short to voltage.
Fuel pump relay malfunction
Fuel pump malfunction
Connector or terminal malfunction
Open circuit between fuel pump terminal B and PCM terminal 1Q
Fuel pump connector for poor connection
Short to power supply between fuel pump terminal B and PCM terminal 1Q
Short to power supply between fuel pump relay terminal D and PCM terminal 1Q
No Go to the next step.
Replace the PCM, then go to the
Yes
next step.
No Go to the next step.
Go to the applicable DTC
Yes inspection. (See DTC TABLE
[MZI-3.7].)
No Troubleshooting completed.