Wiring Diagram:

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

Fig 1: Wiring Diagram - DTC P1498 EGR Solenoid Valve Signal #4 Circuit Malfunction (Low Input)

G03829075

Courtesy of SUBARU OF AMERICA, INC.

DTC P1498 DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1. CHECK POWER SUPPLY TO EGR SOLENOID VALVE. Turn ignition switch to OFF. Disconnect connector from EGR solenoid valve. Turn ignition switch to ON. Measure the power supply voltage between EGR solenoid valve and engine ground. Connector & terminal (E18) No. 2 (+) - Engine ground (-): (E18) 5 (+) - Engine ground (-):	Is the measured value more than 10 V?	Go to step 2.	Repair harness and connector. NOTE: In this case, repair the following: Open circuit in harness between EGR solenoid valve connector and main relay connector Poor contact in coupling connector
2. CHECK HARNESS BETWEEN ECM AND EGR SOLENOID VALVE. Turn ignition switch to OFF. Measure resistance between ECM and EGR solenoid valve connector. Connector & terminal DTC P1492; (B134) No. 9 - (E18) No. 4: DTC P1494; (B134) No. 10 - (E18) No. 1: DTC P1496; (B134) No. 11 - (E18) No. 3: DTC P1498; (B134) No. 8 - (E18) No. 6:	Is the measured value less than 1 Ω?	Go to step 3.	Repair harness and connector. NOTE: In this case, repair the following: Open circuit in harness between EGR solenoid valve connector and main relay connector Poor contact in coupling connector
3. CHECK HARNESS BETWEEN ECM AND EGR SOLENOID VALVE. Disconnect connector from ECM. Measure resistance between ECM connector and chassis ground. Connector & terminal DTC P1492; (B134) No. 9 - (E18) No. 4: DTC P1494; (B134) No. 10 - (E18) No. 6: DTC P1496; (B134) No. 11 - (E18) No. 3: DTC P1498; (B134) No. 8 - (E18) No. 1:	Is the measured value more than 1 MΩ?	Go to step 4.	Repair open or ground short circuit in harness between ECM and EGR solenoid valve connector.
4. CHECK POOR CONTACT. Check poor contact in ECM and EGR solenoid valve connector.	Is there poor contact in ECM or EGR solenoid valve connector?	Repair poor contact in ECM or EGR solenoid valve connector.	Replace EGR solenoid valve. < Ref. to EGR VALVE . >