CHECK HARNESS BETWEEN ECM AND IGNITION COIL CONNECTOR.

Measure the resistance of harness between ECM and engine ground.

Connector & terminal

Euro 4 model

(B134) No. 22 — Engine ground:
(B134) No. 23 — Engine ground:
(B134) No. 24 — Engine ground:
(B134) No. 25 — Engine ground:

Euro 5 model

(B134) No. 11 — Engine ground:
(B134) No. 12 — Engine ground:
(B134) No. 21 — Engine ground:
(B134) No. 22 — Engine ground:

QUESTION

Is the resistance 1 MΩ or more?

Yes No

Repair the ground short circuit of harness between ECM and ignition coil connector.