DTC P0344:00 [MZ-CD 1.6]

id0102g8313300

DTC P0344:00

Camshaft position (CMP) sensor circuit intermittent
DETECTION CONDITION
•  The PCM monitors the CMP sensor signal. If there is no CMP sensor signal or pulse number of the CMP sensor is excessive or deficient for short time, the PCM determines that the CMP sensor circuit has a malfunction.
POSSIBLE CAUSE
•  CMP sensor is dirty.
•  CMP sensor improper installation
•  CMP sensor connector or terminal malfunction
•  Intermittent short to ground between following CMP sensor and PCM terminals
―  CMP sensor terminal B and PCM terminal 128
―  CMP sensor terminal C and PCM terminal 116
•  PCM connector or terminal malfunction
•  CMP sensor circuits (power supply, signal, ground) are intermittent short to each other
•  Intermittent short to power supply between following CMP sensor and PCM terminals
―  CMP sensor terminal A and PCM terminal 129
―  CMP sensor terminal B and PCM terminal 128
―  CMP sensor terminal C and PCM terminal 116
•  Intermittent open circuit between following CMP sensor and PCM terminals
―  CMP sensor terminal A and PCM terminal 129
―  CMP sensor terminal B and PCM terminal 128
―  CMP sensor terminal C and PCM terminal 116
•  CMP sensor malfunction
•  CMP sensor pulse wheel (camshaft pulley) malfunction
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
•  Verify related service repair information availability.
•  Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
•   If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT CMP SENSOR FOR INSTALLATION
•  Inspect the CMP sensor installation.
•  Is the CMP sensor installed properly?
Yes
Go to the next step.
No
Reinstall the CMP sensor properly, then go to Step 13.
(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
4
VISUALLY INSPECT CMP SENSOR
•  Visually inspect the CMP sensor.
•  Is there any metal shaving on the sensor?
Yes
Remove the metal shaving from CMP sensor, then go to Step 13.
No
Go to the next step.
5
INSPECT CMP SENSOR CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the CMP sensor connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion)
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 13.
No
Go to the next step.
6
INSPECT CMP SENSOR CIRCUIT FOR INTERMITTENT SHORT TO GROUND
•  CMP sensor connector is disconnected.
•  Inspect for continuity between CMP sensor and body ground at following wiring harness-side connector with shaking the wiring harness:
―  CMP sensor terminal B
―  CMP sensor terminal C
•  Is there continuity?
Yes
If the short to ground circuit could be detected:
•  Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
•  Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 13.
No
Go to the next step.
7
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion)
•  Is there any malfunction?
Yes
Repair or replace the connector and/or terminals, then go to Step 13.
No
Go to the next step.
8
INSPECT CMP SENSOR CIRCUITS FOR INTERMITTENT SHORT TO EACH OTHER
•  CMP sensor and PCM connectors are disconnected.
•  Inspect continuity between following CMP sensor terminals with shaking the wiring harness at wiring harness-side connector.
―  Terminal A and B
―  Terminal A and C
―  Terminal B and C
•  Is there any continuity?
Yes
Repair or replace the wiring harness for a possible short to each other, then go to Step 13.
No
Go to the next step.
9
INSPECT CMP SENSOR CIRCUIT FOR INTERMITTENT SHORT TO POWER
•  CMP sensor and PCM connectors are disconnected.
•  Switch the ignition to ON (engine off).
•  Measure the voltage at the following CMP sensor wiring harness-side connector terminals with shaking the wiring harness.
―  Terminal A
―  Terminal B
―  Terminal C
•  Is there any voltage?
Yes
Repair or replace the wiring harness for a possible short to power supply, then go to Step 13.
No
Go to the next step.
10
INSPECT CMP SENSOR CIRCUIT FOR INTERMITTENT OPEN
•  CMP sensor and PCM connectors are disconnected.
•  Inspect the continuity between following CMP sensor and PCM terminals with shaking the wiring harness.
―  CMP sensor terminal A and PCM terminal 129
―  CMP sensor terminal B and PCM terminal 128
―  CMP sensor terminal C and PCM terminal 116
•  Is there any continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 13.
11
INSPECT CMP SENSOR
•  Inspect the CMP sensor.
•  Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 13.
12
VISUALLY INSPECT CMP SENSOR PULSE WHEEL
•  Visually inspect the camshaft pulley for damaged, alingement.
•  Is there any malfunction?
Yes
Replace the camshaft pulley, then go to the next step.
(See CAMSHAFT OIL SEAL REPLACEMENT [MZ-CD 1.6].)
No
Replace the CMP sensor, then go to the next step.
(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
13
VERIFY THAT DTC P0344:00 TROUBLESHOOTING IS COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Run the vehicle under the FREEZE FRAME DATA stored condition.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
14
VERIFY AFTER REPAIR PROCEDURE
•  Perform the after repair procedure.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZ-CD 1.6].)
No
DTC troubleshooting completed.