DTC P2090:00 [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)]

id0102j1009800

DTC P2090:00

OCV circuit low input
DETECTION CONDITION
•  The PCM monitors the OCV voltage. If the PCM detects the OCV control voltage (calculated from the OCV) is below the specification voltage (calculated from the battery positive voltage), the PCM determines that the OCV circuit has a malfunction.
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Performs the exhaust variable valve timing control with a maximum cam retard request.
POSSIBLE CAUSE
•  OCV connector or terminals malfunction
•  Short to ground or open circuit in OCV power supply circuit
―  Short to ground in wiring harness between ENGINE2 15 A fuse and OCV terminal B
―  ENGINE2 15 A fuse malfunction
―  Open circuit in wiring harness between main relay terminal C and OCV terminal B
•  Short to ground in wiring harness between OCV terminal A and PCM terminal 1AN
•  PCM connector or terminals malfunction
•  Open circuit in wiring harness between OCV terminal A and PCM terminal 1AN
•  OCV malfunction
•  PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT OCV CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the OCV 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 9.
No
Go to the next step.
4
INSPECT OCV POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT
•  Verify that the OCV connector is disconnected.
•  Switch the ignition ON (engine off).
•  Measure the voltage at the OCV terminal B (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the ENGINE2 15 A fuse.
•  If the fuse is blown:
―  Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE2 15 A fuse and OCV terminal B.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to ground.
•  Replace the fuse.
•  If the fuse is damaged:
―  Replace the fuse.
•  If the fuse is normal:
―  Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal C and OCV terminal B.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 9.
5
INSPECT OCV CONTROL CIRCUIT FOR SHORT TO GROUND
•  Verify that the OCV connector is disconnected.
•  Switch the ignition off.
•  Inspect for continuity between OCV terminal A (wiring harness-side) and body ground.
•  Is there continuity?
Yes
If the short to ground circuit could be detected in the wiring harness:
•  Refer to the wiring diagram and verify whether or not there is a common connector between OCV terminal A and PCM terminal 1AN.
If there is a common connector:
―  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
―  Repair or replace the malfunctioning part.
If there is no common connector:
―  Repair or replace the wiring harness which has a short to ground.
If the short to ground circuit could not be detected in the wiring harness:
•  Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 9.
No
Go to the next step.
6
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 9.
No
Go to the next step.
7
INSPECT OCV CONTROL CIRCUIT FOR OPEN CIRCUIT
•  Verify that the OCV and PCM connectors are disconnected.
•  Inspect for continuity between OCV terminal A (wiring harness-side) and PCM terminal 1AN (wiring harness-side).
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between OCV terminal A and PCM terminal 1AN.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 9.
8
INSPECT OCV
•  Inspect the OCV.
•  Is there any malfunction?
Yes
Replace the OCV, then go to the next step.
(See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
No
Go to the next step.
9
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the KOER self test.
•  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.
10
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].)
No
DTC troubleshooting completed.