Honda Civic manuals

Subaru Legacy Service Manual: Dtc p1498 coil 4 egr "a" control circuit low

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

Improper idling

Poor driving performance

Engine breathing

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.

WIRING DIAGRAM:

Engine Electrical System ENGINE TYPE EZ (WITHOUT PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

Engine Electrical System ENGINE TYPE EZ (WITH PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK POWER SUPPLY TO EGR CONTROL VALVE.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the EGR control valve.

3) Turn the ignition switch to ON.

4) Measure the voltage between EGR control valve connector and engine ground.

Connector & terminal

(E18) No. 2 (+) — Engine ground (−):

(E18) No. 5 (+) — Engine ground (−):

Is the voltage 10 V or more-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1498 COIL 4 EGR "A" CONTROL CIRCUIT LOW

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in harness between EGR control valve connector and main relay connector

Poor contact of coupling connector

2.CHECK HARNESS BETWEEN ECM AND EGR CONTROL VALVE CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from ECM.

3) Measure the resistance of harness between ECM connector and EGR control valve connector.

Connector & terminal

DTC P1492; (E158) No. 12 — (E18) No. 3:

DTC P1494; (E158) No. 48 — (E18) No. 1:

DTC P1496; (E158) No. 25 — (E18) No. 4:

DTC P1498; (E158) No. 49 — (E18) No. 6:

Is the resistance less than 1 --

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1498 COIL 4 EGR "A" CONTROL CIRCUIT LOW

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit of harness between ECM connector and EGR control valve connector

Poor contact of coupling connector

3.CHECK HARNESS BETWEEN ECM AND EGR CONTROL VALVE CONNECTOR.

1) Disconnect the connector from ECM.

2) Measure the resistance between ECM connector and chassis ground.

Connector & terminal

DTC P1492; (E158) No. 12 — Chassis ground:

DTC P1494; (E158) No. 48 — Chassis ground:

DTC P1496; (E158) No. 25 — Chassis ground:

DTC P1498; (B134) No. 41 — Chassis ground:

Is the resistance 1 M- or more-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1498 COIL 4 EGR "A" CONTROL CIRCUIT LOW

Repair ground short circuit of harness between ECM connector and EGR control valve connector.

4.CHECK FOR POOR CONTACT.

Check poor contact of ECM and EGR control valve connectors.

Is there poor contact in ECM or EGR control valve connector-

Repair the poor contact of ECM or EGR control valve connector.

Replace EGR control valve. EGR Control Valve

1. OUTLINE OF DIAGNOSIS

NOTE:

For the detection standard, refer to DTC P1492. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1492 COIL 1 EGR "A" CONTROL CIRCUIT LOW

Dtc p1499 coil 4 egr "a" control circuit high
DTC DETECTING CONDITION:Immediately at fault recognitionTROUBLE SYMPTOM:• Improper idling• Poor driving performance• Engine breathingCAUTION:After servicing or replacing faulty parts ...

Dtc p1497 coil 3 egr "a" control circuit high
NOTE:For the diagnostic procedure, refer to DTC P1499. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P1499 COIL 4 EGR "A" CONTROL CIRCUIT HIGH1. OUTLINE OF DIAGNOSISNOTE:For the detec ...

Other materials:

Locking and unlocking from the outside
NOTE If you unlock the driver's door with a key (including a mechanical key) and open the door while the alarm system is armed, the alarm system is triggered and the vehicle's horn sounds. In this case, perform any of the following operations: Models with "keyless access with push-button st ...

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