ENGINE (DIAGNOSTICS)(H4SO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P1499 EGR SOLENOID VALVE SIGNAL #4 CIRCUIT MALFUNCTION (HIGH INPUT)

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• Erroneous idling

• Poor driving performance

• Engine breathing

CAUTION:

After repairing or replacing the defective part, perform the Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using “List of Diagnostic Trouble Code (DTC)”.

2.CHECK GROUND CIRCUIT FOR ECM.

1) Turn the ignition switch to OFF.

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

Connector & terminal

(B134) No. 5 — Chassis ground:

(B137) No. 7 — Chassis ground:

(B137) No. 1 — Chassis ground:

(B137) No. 2 — Chassis ground:

(B137) No. 3 — Chassis ground:

Is the resistance less than 5 Ω?

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM connector and engine ground terminal

• Poor contact in ECM connector

• Poor contact of coupling connector

3.CHECK HARNESS BETWEEN ECM AND EGR VALVE CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from EGR valve.

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

DTC P1493; (B134) No. 8 (+) — Chassis ground (−):

DTC P1495; (B134) No. 9 (+) — Chassis ground (−):

DTC P1497; (B134) No. 10 (+) — Chassis ground (−):

DTC P1499; (B134) No. 20 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Repair the battery short in harness between ECM and EGR valve connector. After repair, replace the ECM.

Replace the ECM.