Mazda CX-9 Grand Touring 2007 Manual page 421

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
DTC P0119 CHT sensor circuit intermittent/erratic
DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC P0119 (MZI-3.5) DIAGNOSTIC PROCEDURE
STEP
1 VERIFY FREEZE FRAME DATA
HAS BEEN RECORDED
Has FREEZE FRAME DATA
been recorded?
2 VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Verify related Service Bulletins
availability.
Is any related Service Bulletins
available?
3 INSPECT CONNECTOR FOR
POOR CONNECTION
Turn the ignition switch off.
Disconnect PCM connector and
CHT sensor connectors.
Inspect for poor connection (such
as damaged, pulled-out pins, and
corrosion).
Is there any malfunction?
4 INTERMITTENT INSPECTION
Turn the ignition switch to the ON
position (Engine off).
Access the PCM and monitor the
CHT PID.
While observing the PID, perform
the following:
2007 Mazda CX-9 Grand Touring
Indicates the ECT circuit became intermittently open or shorted while the
engine was running.
Harness malfunction
Connector or terminal malfunction
Low engine coolant
CHT sensor malfunction
INSPECTION ACTION
Yes Go to the next step.
No Record FREEZE FRAME DATA on the
repair order, then go to the next step.
Yes Perform repair or diagnosis according to
available Service Bulletins.
If vehicle is not repaired, go to the
next step.
No Go to the next step.
Yes Repair or replace suspected part, then go to
Step 7.
No Go to the next step.
Yes Inspect the CHT sensor.
(see CYLINDER HEAD
TEMPERATURE (CHT) SENSOR
INSPECTION [MZI-3.5]. )
Replace if necessary, then go to Step 7.