DTC P1498 EGR Solenoid Valve Signal #4 Circuit Malfunction (Low Input)

WARNING: This page is about a different variant/trim than selected.

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION < Ref. to DTC P1492 EGR SOLENOID VALVE SIGNAL #1 CIRCUIT MALFUNCTION (LOW INPUT) , Diagnostic Trouble Code (DTC) Detecting Criteria. > < Ref. to DTC P1494 EGR SOLENOID VALVE SIGNAL #2 CIRCUIT MALFUNCTION (LOW INPUT) , Diagnostic Trouble Code (DTC) Detecting Criteria. > < Ref. to DTC P1496 EGR SOLENOID VALVE SIGNAL #3 CIRCUIT MALFUNCTION (LOW INPUT) , Diagnostic Trouble Code (DTC) Detecting Criteria. > < Ref. to DTC P1498 EGR SOLENOID VALVE SIGNAL #4 CIRCUIT MALFUNCTION (LOW INPUT) , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Erroneous idling
Poor driving performance
Engine breathing

CAUTION: After repairing or replacing the defective part, perform the Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: EGR Solenoid Valve Signal #4 Circuit Malfunction (Low Input) - Wiring Diagram

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK POWER SUPPLY TO EGR VALVE. Turn the ignition switch to OFF. Disconnect the connector from EGR valve. Turn the ignition switch to ON. Measure the voltage between EGR valve connector and engine ground. Connector & terminal (E18) No. 2 (+) - Engine ground (-): (E18) No. 5 (+) - Engine ground (-):	Is the voltage more than 10 V?	Go to step 2.	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between EGR valve and main relay connector Poor contact of coupling connector
2 CHECK HARNESS BETWEEN ECM AND EGR VALVE CONNECTOR. Turn the ignition switch to OFF. Measure the resistance between ECM and EGR valve connector. Connector & terminal DTC P1492; (B134) No. 8 - (E18) No. 3: DTC P1494; (B134) No. 9 - (E18) No. 1: DTC P1496; (B134) No. 10 - (E18) No. 4: DTC P1498; (B134) No. 20 - (E18) No. 6:	Is the resistance less than 1 Ω?	Go to step 3.	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit in harness between ECM and EGR valve connector Poor contact of coupling connector
3 CHECK HARNESS BETWEEN ECM AND EGR VALVE CONNECTOR. Disconnect the connectors from ECM. Measure the resistance between ECM connector and chassis ground. Connector & terminal DTC P1492; (B134) No. 8 - Chassis ground: DTC P1494; (B134) No. 9 - Chassis ground: DTC P1496; (B134) No. 10 - Chassis ground: DTC P1498; (B134) No. 20 - Chassis ground:	Is the resistance more than 1 MΩ?	Go to step 4.	Repair the ground short in harness between ECM and EGR valve connector.
4 CHECK POOR CONTACT. Check poor contact in ECM connector and EGR valve connector.	Is there poor contact in ECM connector or EGR valve connector?	Repair the poor contact in ECM connector or EGR valve connector.	Replace the EGR valve. < Ref. to EGR VALVE . >