Mazda CX-9 Grand Touring. Manual — part 235
DTC P0119 [MZI-3.7]
DTC P0119 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
DIAGNOSTIC PROCEDURE
DTC P0119 (MZI-3.7) DIAGNOSTIC PROCEDURE
Is same DTC present?
6
VERIFY AFTER REPAIR PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE". (See AFTER REPAIR
PROCEDURE [MZI-3.7].)
Are any DTCs present?
Yes
Go to the applicable DTC inspection. (See
DTC TABLE [MZI-3.7].)
No
Troubleshooting completed.
DTC P0119
CHT sensor circuit intermittent/erratic
DETECTION
CONDITION
Indicates the ECT circuit became intermittently open or shorted while
the engine was running.
POSSIBLE CAUSE
Harness malfunction
Connector or terminal malfunction
Low engine coolant
CHT sensor malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
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
Verify related Service Bulletins
availability.
Is any related Service Bulletins
available?
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.
3
INSPECT CONNECTOR FOR POOR
CONNECTION
Turn the ignition switch off.
Disconnect PCM connector and CHT
sensor connectors.
Inspect for poor connection (such as
Yes
Repair or replace suspected part, then go to Step
7.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 73
© 2005 Mitchell Repair Information Company, LLC.
damaged, pulled-out pins, and
corrosion).
Is there any malfunction?
No
Go to the next step.
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:
Tap on the sensor to simulate
road shock
Wiggle the sensor connector
Is there a large change in the voltage
reading?
Yes
Inspect the CHT sensor. (See CYLINDER
HEAD TEMPERATURE (CHT) SENSOR
INSPECTION [MZI-3.7] .)
Replace if necessary, then go to Step 7.
No
Go to the next step.
5
INSPECT ELECTRONIC ENGINE
CONTROL (EEC) WIRING HARNESS
Access the PCM and monitor the CHT
PID.
While observing the PID, wiggle,
shake, and bend small sections of the
wiring harness while working from the
sensor to the PCM.
Is there a large change in the voltage
reading?
Yes Repair if necessary, then go to Step 7.
No
Go to the next step.
6
INSPECT FOR CORRECT PCM
OPERATION
Disconnect the PCM connector.
Visually inspect for:
Pushed out pins
Corrosion
Connect all the PCM connectors and
verify that they seat correctly.
Retrieve DTCs using the M-MDS.
Is the PENDING CODE for this DTC
present?
Yes Go to the next step.
No
The system is correctly. Go to the next step.
VERIFY TROUBLESHOOTING OF
DTC P0119 HAS BEEN COMPLETED
Make sure to reconnect all
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 74
© 2005 Mitchell Repair Information Company, LLC.
DTC P0122 [MZI-3.7]
DTC P0122 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
7
disconnected connectors.
Clear the DTC from memory using M-
MDS.
Start the engine.
Perform the "KOEO/KOER self-
test" (See KOEO/KOER SELF TEST
[MZI-3.7].)
Is same 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.
8
VERIFY AFTER REPAIR PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTCs present?
Yes
Go to the applicable DTC inspection. (See DTC
TABLE [MZI-3.7].)
No
Troubleshooting completed.
DTC P0122
TP sensor No.1 circuit low input
DETECTION
CONDITION
The TP sensor No.1 circuit was flagged as a concern by the PCM indicating a
low voltage or open circuit.
POSSIBLE CAUSE
TP sensor No.1 malfunction
Connector or terminal malfunction
Open circuit between throttle body terminal F and PCM terminal 2Z
Short to ground circuit between throttle body terminal F and PCM terminal 2Z
Open circuit between throttle body terminal E and PCM terminal 2AH
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 75
© 2005 Mitchell Repair Information Company, LLC.
DIAGNOSTIC PROCEDURE
DTC P0122 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
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.
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
Perform repair or diagnosis according to the
available Service Bulletins.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 76
© 2005 Mitchell Repair Information Company, LLC.
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