DTC P1290 (MZI-3.5) DIAGNOSTIC PROCEDURE
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 repair information
availability.
z
Is any related Service Bulletins
available?
Yes
Perform repair or diagnosis according to
the available Service Bulletins.
z
If the vehicle is not repaired, go to
the next step.
No
Go to the next step.
3
INSPECT TERMINAL BENT
z
Turn the ignition switch off.
z
Disconnect the CHT sensor
connector.
z
Inspect for bent of CHT sensor
terminals A and B (part-side).
z
Is there any malfunction?
Yes
Repair or replace the terminal, then go to
Step 6.
No
Go to the next step.
4
INSPECT CHT SENSOR SIGNAL
CIRCUIT FOR SHORT TO
GROUND
z
Turn the ignition switch off.
z
Inspect for continuity between
CHT sensor terminal B (wiring
harness-side) and body ground.
z
Is there continuity?
Yes
Repair or replace suspected part, then go to
Step 6.
No
Go to the next step.
5
INSPECT CHT SENSOR
z
Inspect the CHT sensor.
(see
CYLINDER HEAD
TEMPERATURE (CHT)
SENSOR INSPECTION [MZI-
3.5].
)
z
Is there any malfunction?
Yes
Replace the CHT sensor, then go to the
next step.
No
Go to the next step.
6
VERIFY TROUBLESHOOTING OF
DTC P1290 HAS BEEN
Yes
Replace the PCM, then go to the next step.
(see
PCM
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:36 AM
Page 357
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