Mazda CX-9 Grand Touring. Manual — part 261
Turn the ignition switch to the ON
position (Engine running).
With the engine running, determine if
the generator is still noisy.
Does the noise remain constant when
the terminal B is disconnected?
5
INSPECT CMP SENSOR (RH)
CONNECTOR FOR POOR
CONNECTION
Turn the ignition switch off.
Disconnect the CMP sensor (RH)
connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there any malfunction?
Yes
Repair or replace suspected part, then go to Step
11.
No
Go to the next step.
6
INSPECT CMP SENSOR SIGANAL
CIRCUIT FOR SHORT TO POWER
SUPPLY
Turn the ignition switch to the ON
position (Engine off).
Measure voltage between CMP sensor
(RH) terminal A (wiring harness-side)
and body ground.
Is the voltage B+?
Yes
Repair or replace suspected part, then go to Step
11.
No
Go to the next step.
7
INSPECT CMP SENSOR (RH) SIGNAL
CIRCUIT FOR SHORT TO GROUND
Turn the ignition switch off.
Check continuity between CMP sensor
(RH) terminal A and body ground.
Is there continuity?
Yes
Repair or replace suspected part, then go to Step
11.
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
Turn the ignition switch off.
Disconnect PCM connector.
Check for poor connection (such as
damaged, pulled-out pins, and
corrosion).
Are there any malfunction?
Yes
Repair or replace suspected part, then go to Step
11.
No
Go to the next step.
INSPECT CMP SENSOR (RH) CIRCUIT
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:37 AM
Page 177
© 2005 Mitchell Repair Information Company, LLC.
DTC P0344 [MZI-3.7]
DTC P0344 (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
9
FOR OPEN CIRCUIT
Turn the ignition switch off.
Check continuity between the
following circuits:
CMP sensor (RH) terminal A
and PCM terminal 2X
CMP sensor (RH) terminal B
and PCM terminal 2C
Is there continuity?
Yes Go to the next step.
No
Repair or replace suspected part, then go to Step
11.
10
INSPECT CMP SENSOR (RH)
Inspect CMP sensor (RH). (See
CRANKSHAFT POSITION (CKP)
SENSOR INSPECTION [MZI-
3.7] .)
Is there any malfunction?
Replace CMP sensor (RH), then go to the next
step. (See CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION
[MZI-3.7] .)
No
Go to the next step.
11
VERIFY TROUBLESHOOTING OF
DTC P0340 COMPLETED
Verify that all disconnected
connectors reconnected.
Turn ignition switch to the ON
position (Engine off).
Clear the DTC from the PCM memory
using the M-MDS.
Start the engine.
Access the MAF PID using the M-
MDS.
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.
12
VERIFY AFTER REPAIR
PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE". (See AFTER
REPAIR PROCEDURE [MZI-3.7].)
Are any DTC present?
Yes
Go to the applicable DTC inspection. (See DTC
TABLE [MZI-3.7].)
No
Troubleshooting completed.
DTC P0344
CMP sensor (RH) circuit intermittent
DETECTION
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:37 AM
Page 178
© 2005 Mitchell Repair Information Company, LLC.
CONDITION
The test fails when the PCM detects an intermittent signal from the CMP
sensor.
POSSIBLE CAUSE
Connector or terminal malfunction
CMP sensor (RH) malfunction
Sensor shielding malfunction
Short to ground circuit between CMP sensor (RH) terminal A and PCM
terminal 2X
Short to power supply between CMP sensor (RH) terminal A and PCM
terminal 2X
Open circuit between CMP sensor (RH) terminal A and PCM terminal 2X
Open circuit between CMP sensor (RH) terminal B and PCM terminal 2C
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:37 AM
Page 179
© 2005 Mitchell Repair Information Company, LLC.
DIAGNOSTIC PROCEDURE
DTC P0344 (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
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:37 AM
Page 180
© 2005 Mitchell Repair Information Company, LLC.
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