CHECK HARNESS BETWEEN ECM AND EGR VALVE CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM.

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

Connector & terminal

Euro 4 model

DTC P1492; (B134) No. 15 — (E18) No. 3:
DTC P1494; (B134) No. 12 — (E18) No. 6:
DTC P1496; (B134) No. 14 — (E18) No. 1:
DTC P1498; (B134) No. 13 — (E18) No. 4:

Euro 5 model

DTC P1492; (B134) No. 23 — (E18) No. 3:
DTC P1494; (B134) No. 14 — (E18) No. 6:
DTC P1496; (B134) No. 24 — (E18) No. 1:
DTC P1498; (B134) No. 13 — (E18) No. 4:

QUESTION

Is the resistance less than 1 Ω?

Yes No

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