Mazda CX-9 Grand Touring. Manual — part 281

DTC P0581

Cruise control multi-function input circuit high

DETECTION

CONDITION



P0581 sets when the cruise control switch circuits are shorted to voltage or
open.

POSSIBLE CAUSE



Connector or terminal malfunction



Open circuit between cruise control switch terminal B and PCM terminal
1AT



Open circuit between cruise control switch terminal C and PCM terminal
1AP



Short to power supply between cruise control switch terminal B and PCM
terminal 1 AT



Short to power supply between cruise control switch terminal C and PCM
terminal 1 AP



Cruise control switch malfunction



PCM malfunction

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:39 AM

Page 257

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC P0581 (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 CRUISE CONTROL SWITCH
CONNECTOR FOR POOR
CONNECTION



Turn the ignition switch to off.



Disconnect the cruise control switch
connector.



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



Are there any malfunction?

Yes

Repair or replace suspected part, then go to Step
8.

No

Go to the next step.

4

IINSPECT CRUISE CONTROL
SWITCH CIRCUIT FOR SHORT TO
POWER SUPPLY



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



Measure the voltage between the
following terminals:



Cruise control switch terminal B
and body ground



Cruise control switch terminal C
and body ground



Are there voltage B+?

Yes

Repair or replace suspected part, then go to Step
8.

No

Go to the next step.

5

INSPECT PCM CONNECTOR FOR
POOR CONNECTION



Turn the ignition switch off.



Disconnect the PCM connector.

Yes

Repair or replace suspected part, then go to Step
8.

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:39 AM

Page 258

© 2005 Mitchell Repair Information Company, LLC.



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



Are there any malfunction?

No

Go to the next step.

6

INSPECT CRUISE CONTROL SWITCH
CIRCUIT FOR OPEN



Disconnect the PCM connector.



Inspect for continuity between the
following terminals:



Cruise control switch terminal B
and PCM terminal 1AT



Cruise control switch terminal C
and PCM terminal 1AP



Is there continuity?

Yes Go to the next step.

No

Repair or replace suspected part, then go to Step

8.

7

INSPECT CRUISE CONTROL SWITCH



Inspect the cruise control switch. (See
CRUISE CONTROL SWITCH
INSPECTION [MZI-3.7] .)



Is there malfunction?

Yes

Replace the cruise control switch, then go to the
next step.

No

Go to the next step.

8

VERIFY TROUBLESHOOTING OF
DTC P0581 HAS BEEN COMPLETED



Verify that all disconnected
connectors are reconnected.



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



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



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



Retrieve DTCs using the M-MDS.



Is the PENDING CODE for this 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.

9

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.

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:39 AM

Page 259

© 2005 Mitchell Repair Information Company, LLC.

DTC P0600 [MZI-3.7]

DTC P0600 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES

DIAGNOSTIC PROCEDURE

DTC P0600 (MZI-3.7) DIAGNOSTIC PROCEDURE

DTC P0600

Serial communication link

DETECTION

CONDITION



Indicates an error occurred in the PCM. This DTC may be set alone or in
combination with P2105.

POSSIBLE CAUSE



PCM malfunction

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 FOR CORRECT PCM
OPERATION



Disconnect all the PCM connectors.



Visually inspect for:



Pushed out pins



Corrosion



Connect all the PCM connectors and
verify that they seat correctly.



Retrieve DTCs using the M-MDS.



Is the PENDING CODE for this DTC
present?

Yes Go to the next step.

No

The system is correctly. Go to the next step.

VERIFY TROUBLESHOOTING OF
DTC P0600 HAS BEEN COMPLETED



Verify that all disconnected
connectors are reconnected.



Turn the ignition switch to the ON

Yes

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

2008 Mazda CX-9 Grand Touring

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

Microsoft

Sunday, November 15, 2009 10:08:39 AM

Page 260

© 2005 Mitchell Repair Information Company, LLC.