Mazda CX-9 Grand Touring 2009 Manual page 1192

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