DTC P1285, P1299 [MZI-3.7]
DTC P1285, P1299 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DIAGNOSTIC PROCEDURE
DTC P1285, P1299 (MZI-3.7) DIAGNOSTIC PROCEDURE
z
Clear the DTC from the PCM
memory using the M-MDS.
z
Start the engine and run it at idle.
z
Retrieve DTCs using the M-MDS.
z
Is the PENDING CODE for this
DTC present?
No
Go to the next step.
7
VERIFY AFTER REPAIR
PROCEDURE
z
Perform "AFTER REPAIR
PROCEDURE". (See
AFTER
REPAIR PROCEDURE [MZI-
3.7]
.)
z
Are any DTC present?
Yes
Go to the applicable DTC inspection. (See
DTC
TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P1285
P1285: Cylinder head over temperature condition
DCT P1299
P1299: Cylinder head over temperature protection active
DETECTION
CONDITION
z
P1285 indicates that an engine overheat condition was sensed by the
CHT sensor.
z
P1299 indicates that an engine overheat condition was detected by the
CHT sensor.
z
Fail-safe function was activated to cool the engine.
POSSIBLE CAUSE
z
Low engine coolant level
z
Base engine malfunction
z
Engine cooling system malfunction
z
CHT sensor malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
z
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
z
Verify related Service Bulletins and/or on-line
Yes
Perform repair or diagnosis according
to the available Service Bulletins.
z
If the vehicle is not repaired, go
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:40 AM
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