DTC P1290 [MZI-3.7]
DTC P1290 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
7
z
Inspect the CHT sensor. (See
CYLINDER HEAD
TEMPERATURE (CHT) SENSOR
INSPECTION [MZI-3.7]
.)
z
Is there any malfunction?
Yes
Replace the CHT sensor, then go to the next
step.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC
P1289 HAS BEEN COMPLETED
z
Verify that all disconnected connectors
reconnected.
z
Clear the DTC from the PCM memory
using the M-MDS.
z
Perform the KOEO or KOER self-test
using the M-MDS.
(See
KOEO/KOER SELF TEST
[MZI-3.7]
.)
z
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.
9
VERIFY AFTER REPAIR PROCEDURE
z
Perform "AFTER REPAIR
PROCEDURE". (See
AFTER
REPAIR PROCEDURE [MZI-3.7]
.)
z
Are any DTCs present?
Yes Go to the applicable DTC inspection. (See
DTC TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P1290
CHT sensor circuit low input
DETECTION
CONDITION
z
Indicates a CHT sensor circuit short to ground.
POSSIBLE CAUSE
z
Short to ground in wiring harness between CHT sensor terminal B and PCM
terminal 2AN
z
CHT sensor malfunction
z
Connector or terminal malfunction
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:41 AM
Page 328
© 2005 Mitchell Repair Information Company, LLC.
