DTC P2494:00 [PCM (SKYACTIV-D 2.2)]

id0102j5214900


Engine Type

Item

Reference
Fuel injector (2 pin type)
(See Fuel injector (2 pin type).)
Fuel injector (6 pin type)
(See Fuel injector (6 pin type).)


Fuel injector (2 pin type)

DTC P2494:00

EGR cooler bypass valve position sensor circuit low input
DETECTION CONDITION
•  If the input voltage at the PCM terminal 1AV is less than 0.17 V for 5 s, the PCM determines that the EGR cooler bypass valve position sensor circuit has a malfunction.
MONITORING CONDITIONS
―  Battery voltage: 8—20 V
―  0.5 s have elapsed after the ignition was switched ON (engine off or on)
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
•  Inhibits the boost control.
•  Inhibits engine-stop by operating the i-stop function.
•  PCM restricts engine-transaxle integration control. (ATX)
•  Inhibits the EGR control.
POSSIBLE CAUSE
•  EGR cooler bypass valve connector or terminals malfunction
•  Short to ground in wiring harness between the following terminals:
―  EGR cooler bypass valve terminal B—PCM terminal 1AU
―  EGR cooler bypass valve terminal F—PCM terminal 1AV
•  PCM connector or terminals malfunction
•  EGR cooler bypass valve position sensor signal circuit and ground circuit are shorted to each other
•  Open circuit in wiring harness between EGR cooler bypass valve terminal B and PCM terminal 1AU
•  EGR cooler bypass valve position sensor (built-into EGR cooler bypass valve) malfunction
•  PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA/SNAPSHOT DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA/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 EGR COOLER BYPASS VALVE CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the EGR cooler bypass 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 9.
No
Go to the next step.
4
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR CIRCUIT FOR SHORT TO GROUND
•  Verify that the EGR cooler bypass valve connector is disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side) and body ground:
―  EGR cooler bypass valve terminal B
―  EGR cooler bypass valve terminal F
•  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 the following terminals:
―  EGR cooler bypass valve terminal B—PCM terminal 1AU
―  EGR cooler bypass valve terminal F—PCM terminal 1AV
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.
5
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.
6
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
•  Verify that the EGR cooler bypass valve and PCM connectors are disconnected.
•  Inspect for continuity between EGR cooler bypass valve terminals F and D (wiring harness-side).
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
•  EGR cooler bypass valve terminal F—PCM terminal 1AV
•  EGR cooler bypass valve terminal D—PCM terminal 1AT
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 each other.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to each other.
Go to Step 9.
No
Go to the next step.
7
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Verify that the EGR cooler bypass valve and PCM connectors are disconnected.
•  Inspect for continuity between EGR cooler bypass valve terminal B (wiring harness-side) and PCM terminal 1AU (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 EGR cooler bypass valve terminal B and PCM terminal 1AU.
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 EGR COOLER BYPASS VALVE POSITION SENSOR
•  Reconnect all disconnected connectors.
•  Inspect the EGR cooler bypass valve position sensor.
•  Is there any malfunction?
Yes
Replace the EGR cooler bypass valve, then go to the next step.
(See EGR COOLER BYPASS VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
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 KOEO or 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-D 2.2)].)
No
DTC troubleshooting completed.


Fuel injector (6 pin type)

DTC P2494:00

EGR cooler bypass valve position sensor circuit low input
DETECTION CONDITION
•  With the following conditions met, the output voltage of the EGR cooler bypass valve position sensor is less than 0.18 V for a continuous 2.5 s.
―  Battery positive voltage: 8—16 V
―  0.5 s or more have elapsed after ignition is switched ON (engine off or on)
―  The following DTCs are not detected
•  Constant voltage power supply control system: P0652:00, P0653:00
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
•  Limits engine torque.
•  Inhibits the automatic diesel particulate filter regeneration control.
•  Inhibits the manual diesel particulate filter regeneration control.
•  Inhibits the EGR control.
POSSIBLE CAUSE
•  EGR cooler bypass valve/EGR cooler bypass valve position sensor connector or terminal malfunction
•  Short to ground in wiring harness between the following terminals:
―  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal B and PCM terminal 1AU
―  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal F and PCM terminal 1AV
•  PCM connector or terminal malfunction
•  Short circuit in EGR cooler bypass valve position sensor signal circuit and ground circuit
•  Open circuit in wiring harness between EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal B and PCM terminal 1AU
•  EGR cooler bypass valve position sensor malfunction
•  PCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action
1
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the freeze frame data/snap shot data.
—
Go to the next step.
2
INSPECT EGR COOLER BYPASS VALVE/EGR COOLER BYPASS VALVE POSITION SENSOR CONNECTOR CONDITION
•  Switch the ignition OFF.
•  Disconnect the EGR cooler bypass valve/EGR cooler bypass valve position sensor connector.
•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 8.
3
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is the connector normal?
Yes
Go to the next step.
No
Repair or replace the connector, then go to Step 8.
4
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR CIRCUIT FOR SHORT TO GROUND
•  Verify that the EGR cooler bypass valve/EGR cooler bypass valve position sensor connector and the PCM connector are disconnected.
•  Inspect for continuity between the following terminals (vehicle wiring harness side) and ground.
―  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal B
―  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal F
•  Is there continuity?
Yes
•  Refer to the wiring diagram and verify if there is a common connector between the following terminals.
―  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal B and PCM terminal 1AU
―  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal F and PCM terminal 1AV
If there is a common connector:
―  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.
―  Repair or replace the malfunctioning location.
If there is no common connector:
―  Repair or replace the wiring harness which is shorted to ground.
•  Go to Step 8.
No
Go to the next step.
5
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT CIRCUIT
•  Verify that the EGR cooler bypass valve/EGR cooler bypass valve position sensor connector and the PCM connector are disconnected.
•  Inspect for continuity between EGR cooler bypass valve/EGR cooler bypass valve position sensor terminals F and D (vehicle wiring harness side).
•  Is there continuity?
Yes
Refer to the wiring diagram and verify if there is a common connector between the following terminals.
•  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal F and PCM terminal 1AV
•  EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal D and PCM terminal 1AT
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short circuit to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the malfunctioning wiring harness.
Go to Step 8.
No
Go to the next step.
6
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
•  Verify that the EGR cooler bypass valve/EGR cooler bypass valve position sensor connector and the PCM connector are disconnected.
•  Inspect the wiring harness for continuity between EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal B (vehicle wiring harness side) and PCM terminal 1AU (vehicle wiring harness side).
•  Is there continuity?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify if there is a common connector between EGR cooler bypass valve/EGR cooler bypass valve position sensor terminal B and PCM terminal 1AU.
If there is a common connector:
•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
•  Repair or replace the malfunctioning location.
If there is no common connector:
•  Repair or replace the wiring harness which has an open circuit.
Go to Step 8.
7
INSPECT EGR COOLER BYPASS VALVE POSITION SENSOR
•  Reconnect all the disconnected connectors.
•  Inspect the EGR cooler bypass valve position sensor.
•  Is the EGR cooler bypass valve position sensor normal?
Yes
Go to the next step.
No
Replace the EGR cooler bypass valve, then go to the next step.
(See EGR COOLER BYPASS VALVE REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
8
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Reconnect all the disconnected connectors.
•  Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.
•  Switch the ignition ON (engine off) or leave for 10 s while idling.
•  Display the DTCs using the M-MDS.
•  Has DTC P2494:00 been recorded?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM, then go to the next step.
No
Go to the next step.
9
VERIFY OTHER DTCs
•  Has any other DTC or pending code been stored?
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
No
DTC troubleshooting completed.