Mazda CX-9 Grand Touring. Manual — part 275

1

VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED



Has FREEZE FRAME DATA been
recorded?

Yes Go to the next step.

No

Record the FREEZE FRAME DATA on the repair

order, then go to the next step.

2

VERIFY REPAIR INFORMATION
AVAILABILITY



Verify related Service Bulletins
availability.



Is any related Service Bulletins
available?

Yes

Perform repair or diagnosis according to the
available Service Bulletins. If the vehicle is not
repaired, go to the next step.

No

Go to the next step.

3

VERIFY RELATED PENDING CODE
OR STORED DTCs



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



Verify related pending code or
stored DTCs.



Is other DTCs present?

Yes

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

No

Go to the next step.

4

VERIFY STORED DTC IN
INSTRUMENT CLUSTER



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



Verify stored DTCs in instrument
cluster.



Is other DTCs present?

Yes

Go to the appropriate DTC inspection. (See DTC
TABLE [INSTRUMENT CLUSTER] .)

No

Go to the next step.

5

VERIFY TROUBLESHOOTING OF
DTC P0463 HAS BEEN COMPLETED



Verify that all disconnected
connectors reconnected.



Clear the DTC from the PCM
memory using the M-MDS.



Perform the "KOEO/KOER self-
test". (See KOEO/KOER SELF
TEST [MZI-3.7].)



Is the PENDING CODE for the
DTC present?

Yes

Replace the PCM, then go to the next step. (See
PCM REMOVAL/INSTALLATION [MZI-
3.7] .)

No

Go to the next step.

VERIFY AFTER REPAIR
PROCEDURE



Perform the "AFTER REPAIR

Yes

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

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:38 AM

Page 233

© 2005 Mitchell Repair Information Company, LLC.

DTC P0480 [MZI-3.7]

DTC P0480 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

6

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



Are any DTCs present?

No

Troubleshooting completed.

DTC P0480

Fan control circuit

DETECTION

CONDITION



This test inspect the fan control circuit. The DTC sets if the PCM detects the
voltage on the fan control variable circuit is not within the expected range.

POSSIBLE CAUSE



Connector or terminal malfunction



Fan control module malfunction

Dual fan control module



Open circuit between fan control module No.1 terminal 1B and PCM
terminal 1AM



Short to power supply between fan control module No.1 terminal 1B and
PCM terminal 1AM



Short to ground circuit between fan control module No.1 terminal 1B and
PCM terminal 1AM



Open circuit between fan control module No.2 terminal B and PCM
terminal 1AM



Short to power supply between fan control module No.2 terminal B and
PCM terminal 1AM



Short to ground circuit between fan control module No.2 terminal B and
PCM terminal 1AM



Open circuit between fan control module No.1 terminal 1A and cooling fan
relay No.1 terminal E



Open circuit between fan control module No.1 terminal 1C and body ground



Open circuit between fan control module No.2 terminal A and cooling fan
relay No.2 terminal E



Open circuit between fan control module No.2 terminal C and body ground

Single fan control module



Open circuit between fan control module terminal 1B and PCM terminal 1
AM



Short to power supply between fan control module terminal 1B and PCM
terminal 1AM



Short to ground circuit between fan control module terminal 1B and PCM

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:38 AM

Page 234

© 2005 Mitchell Repair Information Company, LLC.

terminal 1AM



Open circuit between fan control module terminal 1C and cooling fan relay
terminal E



Open circuit between fan control module terminal 1A and body ground

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:38 AM

Page 235

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P0480 (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 and/or
on-line repair information availability.



Is any related Service Bulletins
available?

Yes

Perform repair or diagnosis according to the
available Service Bulletins.



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

No

Go to the next step.

3

INSPECT FAN CONTROL MODULE
CONNECTOR FOR POOR
CONNECTION



Turn the ignition switch off.



Disconnect fan control module
connector.



Inspect for poor connection (such as
damaged, pulled-out pins, corrosion,
etc.).



Are there any malfunction?

Yes

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

No

Go to the next step.

INSPECT FAN CONTROL MODULE
POWER SUPPLY CIRCUIT FOR OPEN
CIRCUIT



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



Measure voltage between the following
circuits:

Dual fan control module

Yes 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 10:08:38 AM

Page 236

© 2005 Mitchell Repair Information Company, LLC.