DTC P0488:00 [SKYACTIV-D 1.5]

id0102q2159900

DTC P0488:00

Duty signal error in HP-EGR control valve control system
DETECTION CONDITION
•  When the following conditions are met, the HP-EGR control valve control duty value is 90 % or more for a continuous 2 s:
MONITORING CONDITIONS
―  HP-EGR control valve is operating
―  When any of the following conditions is met:
•  Boost air temperature: 30 °C {86 °F} or more
•  Intake air temperature: 30 °C {86 °F} or more
•  Engine coolant temperature: 70 °C {158 °F} or more
―  The following DTCs are not detected:
•  HP-EGR control valve DC motor control system: P0404:00
•  Boost air temperature sensor: P007C:00, P007D:00
•  IAT sensor No.1: P0112:00, P0113:00
•  ECT sensor: P0117:00, P0118:00
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/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  PCM restricts engine torque.
•  Inhibits the auto DPF regeneration control.
•  Inhibits the compulsory DPF regeneration control.
•  Inhibits the EGR control.
•  PCM restricts engine-transaxle integration control. (ATX)
•  Inhibits engine-stop by operating the i-stop function.
POSSIBLE CAUSE
•  HP-EGR control valve connector or terminals malfunction
•  PCM connector or terminals malfunction
•  HP-EGR control valve malfunction
•  PCM malfunction
SYSTEM WIRING DIAGRAM
Not applicable

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data on the repair order.
—
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 HP-EGR CONTROL VALVE CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the HP-EGR control valve 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 6.
No
Go to the next step.
4
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 6.
No
Go to the next step.
5
INSPECT HP-EGR CONTROL VALVE
•  Inspect the HP-EGR control valve.
•  Is there any malfunction?
Yes
Replace the HP-EGR control valve, then go to the next step.
(See HP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
No
Go to the next step.
6
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and warm it up completely.
•  Perform the DTC Reading Procedure.
•  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.
7
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SKYACTIV-D 1.5].)
No
DTC troubleshooting completed.