DTC P1684 [13B-MSP]


id0102g1781000

DTC P1684

Metering oil pump oil pressure sensor–oil pressure is low

DETECTION CONDITION
•  It is that the oil pressure at the metering oil pump system is less than 40 kPa {0.41 kgf/cm2, 5.8 psi} continues for 10 s, after specified period passes after the engine starts.
Diagnostic support note
•  This is a continuous monitor (Other).
•  The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Low engine oil level
•  Engine oil leakage (oil hose and/or drain hose looseness)
•  Oil pressure sensor malfunction (abnormal characteristic)
•  Oil pump malfunction (relief valve stuck open)
•  Engine oil leakage between OCV and metering oil pump drain line (quick connector poor connection or comes off)
•  Looseness of oil pressure sensor
•  Looseness of OCV
•  OCV malfunction (stuck close)
•  PCM malfunction

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 the FREEZE FRAME DATA on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILBAILITY
•  Verify related Service information availability.
•  Is any related Service information available?
Yes
Perform repair or diagnosis according to th available Service information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE OR STORED DTC
•  Turn the ignition switch off, then to the ON position (engine off).
•  Verify the related PENDING CODE or stored DTCs.
•  Are other DTCs present?
Yes
Go to the appropriate DTC inspection.
No
Go to the next step.
4
VERIFY THAT METERING OIL PUMP SYSTEM RELATED DTC
•  Turn the ignition switch off, then to the ON position (engine off).
•  Verify the related PENDING CODE or stored DTCs.
•  Is the DTC P0522, P0523, P1680, P1681, P1682, P1683, P1686 or P1687 present?
Yes
Go to the appropriate DTC inspection.
No
Go to the next step.
5
VERIFY ENGINE OIL LEVEL
•  Verify that the engine oil level.
•  Is the engine oil level normal?
Yes
Go to the next step.
No
Refill the engine oil to specified level, then go to the next step.
6
VERIFY THAT ENGINE OIL LEAKAGE FROM ENGINE COMPONENT
•  Verify that leakage engine oil from following;
―  Oil filter component
―  Oil pan
―  Housing
―  Oil cooler hose joint
―  Drain plug (looseness)
•  Does the engine oil leakage detected?
Yes
Repair or replace the malfunctioning part, then go to Step 13.
No
Go to the next step.
7
VERIFY WHETHER MALFUNCTION IS IN OIL PRESSURE SENSOR ABNORMAL CHARACTER OR ELSEWHERE
•  Monitor the PID MOP_P_ACT using the M-NDS PID/data monitor function while the ignition switch is ON (engine off).
•  Is the PID MOP_P_ACT value less than 0 kPa?
Yes
Replace the oil pressure sensor, then go to Step 13.
No
Go to the next step.
8
INSPECT OIL PRESSURE
•  Perform the “OIL PRESSURE INSPECTION”.
•  Is the oil pressure within the specified?
Yes
Go to the next step.
No
Replace the oil pump, then go to Step 13.
9
VERIFY THAT METERING OIL PUMP SYSTEM RELATED PART
•  Verify that the joint point condition for the metering oil pump system (between engine and metering oil pump system drain through the metering oil pump).
•  Are there poor connection, loose and/or engine oil leakage detected?
Yes
Repair or replace the malfunctioning part, then go to Step 13.
No
Go to the next step.
10
VERIFY OIL PRESSURE SENSOR INSTALLATION
•  Verify that the installation oil pressure sensor.
•  Is the oil pressure sensor installed properly?
Yes
Go to the next step.
No
Install the oil pressure sensor properly, go to Step 13.
11
VERIFY OCV INSTALLATION
•  Verify that the OCV installation.
•  Is the OCV installed properly?
Yes
Go to the next step.
No
Install the OCV properly, go to Step 13.
12
INSPECT OCV
•  Inspect the OCV.
•  Is there any malfunction?
Yes
Replace the OCV, then go to the next step.
No
Go to the next step.
13
VERIFY TROUBLESHOOTING OF DTC P1684 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and warm it up completely.
•  Is the same DTC present?
Yes
Replace the PCM, then 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.
No
DTC troubleshooting completed.