CHECK HARNESS BETWEEN MAIN FAN RELAY 2 AND ECM.

Measure the resistance between the main fan relay 2 terminal and ECM connector.

Connector & terminal

Euro 4 model

(B135) No. 27 — (F27) No. 22:

Euro 5 model

(B134) No. 32 — (F27) No. 22:

QUESTION

Is the resistance less than 1 Ω?

Yes No

Repair the open circuit of the harness between main fan relay 2 terminal and ECM.