Mazda CX-9 Grand Touring. Manual — part 253

No

Go to the next step.

3

VERIFY RELATED PENDING CODE OR STORED
DTC



Verify the related PENDING CODE or stored
DTCs.



Are other DTCs present?

Yes

Go to appropriate DTC inspection.
(See DTC TABLE [MZI-3.7].)

No

Go to the next step.

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?

Yes

Repair or replace suspected part,
then go to Step 9.

No

Go to the next step.

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?

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



Turn the ignition switch to the ON position (Engine
off).



Measure voltage between fuel pump relay
connector terminal C (wiring harness-side) and
body ground.



Is voltage B+?

Yes Go to the next step.

No

Repair or replace suspected part,

then go to Step 9.

7

INSPECT FUEL PUMP MONITOR CIRCUIT FOR
OPEN CIRCUIT



Turn the ignition switch off.



Inspect continuity between fuel pump relay
terminal D (wiring harness-side) and PCM terminal
1Q (wiring harness-side).



Is there continuity?

Yes Go to the next step.

No

Repair or replace suspected part,

then go to Step 9.

8

INSPECT FUEL PUMP RELAY



Inspect the fuel pump relay. (See RELAY

Yes

Replace the fuel pump relay, then
go to the next step.

2008 Mazda CX-9 Grand Touring

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:08:36 AM

Page 145

© 2005 Mitchell Repair Information Company, LLC.

DTC P0232 [MZI-3.7]

DTC P0232 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

INSPECTION .)



Is there any malfunction?

No

Go to the next step.

9

VERIFY TROUBLESHOOTING OF DTC P0231
HAS BEEN COMPLETED



Verify that all disconnected connectors
reconnected.



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?

Yes

Replace the PCM, then go to the
next step.

No

Go to the next step.

10

VERIFY AFTER REPAIR PROCEDURE



Perform the "AFTER REPAIR PROCEDURE".
(See AFTER REPAIR PROCEDURE [MZI-
3.7].)



Are any DTCs present?

Yes

Go to the applicable DTC
inspection. (See DTC TABLE
[MZI-3.7].)

No

Troubleshooting completed.

DTC P0232

FP secondary circuit high

DETECTION

CONDITION



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.

POSSIBLE

CAUSE



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

2008 Mazda CX-9 Grand Touring

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:08:36 AM

Page 146

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P0232 (MZI-3.7) DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED



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



Verify related Service Bulletins availability.



Is any related Service Bulletins available?

Yes

Perform repair or diagnosis
according to available Service
Bulletins.



If vehicle is not repaired, go
to the next step.

2008 Mazda CX-9 Grand Touring

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:08:36 AM

Page 147

© 2005 Mitchell Repair Information Company, LLC.

No

Go to the next step.

3

VERIFY RELATED PENDING CODE OR STORED
DTC



Verify the related PENDING CODE or stored
DTCs.



Are other DTCs present?

Yes

Go to appropriate DTC inspection.
(See DTC TABLE [MZI-3.7].)

No

Go to the next step.

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?

Yes

Repair or replace suspected part,
then go to Step 10.

No

Go to the next step.

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?

Yes

Repair or replace suspected part,
then go to Step 10.

No

Go to the next step.

6

INSPECT FUEL PUMP MONITOR CIRCUIT FOR
SHORT TO POWER SUPPLY



Turn the ignition switch to the ON position
(Engine off).



Measure voltage between the following terminals:



Fuel pump relay terminal D (wiring harness-
side) and body ground



fuel pump terminal B (wiring harness-side)
and body ground



Is voltage B+?

Yes

Repair or replace suspected part,
then go to Step 10.

No

Go to the next step.

7

INSPECT FUEL PUMP MONITOR CIRCUIT FOR
OPEN CIRCUIT



Turn the ignition switch off.



Inspect continuity between fuel pump terminal B
(wiring harness-side) and PCM terminal 1Q
(wiring harness-side).



Is there continuity?

Yes Go to the next step.

No

Repair or replace suspected part,

then go to Step 10.

2008 Mazda CX-9 Grand Touring

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:08:36 AM

Page 148

© 2005 Mitchell Repair Information Company, LLC.