Mazda CX-9 Grand Touring. Manual — part 280
CONDITION
voltage or ground.
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 1AT
Short to power supply between cruise control switch terminal C and PCM
terminal 1 AP
Short to ground circuit between cruise control switch terminal B and PCM
terminal 1AT
Short to ground circuit between cruise control switch terminal C and PCM
terminal 1AP
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 253
© 2005 Mitchell Repair Information Company, LLC.
DIAGNOSTIC PROCEDURE
DTC P0579 (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
Yes
Perform repair or diagnosis according to the
available Service Bulletins.
If the 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 10:08:39 AM
Page 254
© 2005 Mitchell Repair Information Company, LLC.
available?
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
9.
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
9.
No
Go to the next step.
5
INSPECT CRUISE CONTROL SWITCH
CIRCUIT FOR SHORT TO GROUND
Turn the ignition switch off.
Inspect for continuity between the
following terminals:
Cruise control switch terminal B
and body ground
Cruise control switch terminal C
and body ground
Are there continuity?
Yes
Repair or replace suspected part, then go to Step
9.
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
Turn the ignition switch off.
Disconnect the PCM 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
9.
No
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 10:08:39 AM
Page 255
© 2005 Mitchell Repair Information Company, LLC.
DTC P0581 [MZI-3.7]
DTC P0581 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
7
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
Are there continuity?
Yes Go to the next step.
No
Repair or replace suspected part, then go to Step
9.
8
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.
9
VERIFY TROUBLESHOOTING OF
DTC P0579 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.
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.
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 256
© 2005 Mitchell Repair Information Company, LLC.
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