CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.

Measure the resistance of harness between ECM and fuel injector connector on faulty cylinders.

Connector & terminal

Euro 4 model

#1 (B134) No. 17 — (E5) No. 1:
#2 (B134) No. 16 — (E16) No. 1:
#3 (B134) No. 27 — (E6) No. 1:
#4 (B134) No. 26 — (E17) No. 1:

Euro 5 model

#1 (B134) No. 15 — (E5) No. 2:
#2 (B134) No. 16 — (E16) No. 2:
#3 (B134) No. 25 — (E6) No. 2:
#4 (B134) No. 26 — (E17) No. 2:

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 fuel injector connector

• Poor contact of coupling connector