DTC Code | DTC Name |
---|---|
P0489 | Exhaust Gas Recirculation Control Circuit Low |
P0490 | Exhaust Gas Recirculation Control Circuit High |
DESCRIPTION
The ECM opens and closes the EGR valve using a DC motor type actuator. Due to opening and closing the valve, the exhaust gas recirculation volume can be properly controlled.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0489 | Exhaust Gas Recirculation Control Circuit Low |
Open in electric EGR control valve assembly circuit (2 trip detection logic) |
|
Comes on | DTC stored |
P0490 | Exhaust Gas Recirculation Control Circuit High |
Short in electric EGR control valve assembly circuit (2 trip detection logic) |
|
Comes on | DTC stored |
DTC No. | DTC Detection Drive Pattern |
---|---|
P0489 |
Turn the ignition switch to ON and wait for 10 seconds (Monitor this DTC only once per driving cycle) |
P0490 | Turn the ignition switch to ON and wait for 30 seconds |
WIRING DIAGRAM
*a | (Shielded) |
*b | Electric EGR Control Valve Assembly |
CAUTION / NOTICE / HINT
When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
PROCEDURE
PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Actual EGR Valve Pos.
Powertrain > Engine and ECT > Active TestActive Test Display |
---|
Control the EGR Step Position |
Data List Display |
---|
Actual EGR Valve Pos. |
When changing the Active Test value from 1 to 100%, check that Actual EGR Valve Pos. smoothly changes to the set opening angle.
Standard |
---|
Value smoothly changes to the set opening angle. |
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0489 OR P0490)
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON and wait for 30 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Read the pending DTCs.
Powertrain > Engine and ECT > Trouble CodesResult | ||||||
---|---|---|---|---|---|---|
|
B |
END |
A |
REPLACE ECM
Replace the ECM.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT |
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.
Powertrain > Engine and ECT > Clear DTCsTurn the ignition switch off and wait for 30 seconds or more.
Turn the ignition switch to ON and wait for 30 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Confirm that the pending DTC is not output again.
Powertrain > Engine and ECT > Trouble CodesResult | ||
---|---|---|
|
NEXT |
END |
CHECK HARNESS AND CONNECTOR (ELECTRIC EGR CONTROL VALVE ASSEMBLY - ECM)
Disconnect the electric EGR control valve assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG | Нажмите здесь |
OK |
INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY (DC MOTOR)
Inspect the electric EGR control valve assembly.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
OK | Нажмите здесь |
GO TO STEP 3 |
NG |
REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY
Replace the electric EGR control valve assembly.
Click hereНажмите здесь
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 2 |
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result | ||
---|---|---|
|
NEXT | Нажмите здесь |
GO TO STEP 2 |