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CO(H4SO)-8 COOLING RADIATOR MAIN FAN SYSTEM 6 CHECK POWER SUPPLY TO MAIN FAN RE- terminal and chassis ground. Connector & terminal (F66) No. 5 (+) — Chassis ground ( −−−− ): Does the measured value exceed the spec- 10 V 7 CHECK 20 A FUSE. Is the fuse blown-out? Fuse is blown-out. Replace fuse. 8 CHECK POWER SUPPLY TO A/C RELAY Connector & terminal (F27) No. 1 (+) — Chassis ground ( −−−− ): Does the measured value exceed the specified 10 V Repair open circuit Repair open circuit 9 CHECK FUSE. Is the fuse blown-out? Fuse is blown-out. Replace fuse. Repair open circuit 10 CHECK MAIN FAN RELAY. Terminal No. 8 — No. 9: Does the measured value exceed the spec- 1 M Ω Replace main fan 11 CHECK MAIN FAN RELAY. 7 of main fan relay. 2) Measure resistance of main fan relay. Terminal No. 8 — No. 9: Is the measured value less than the speci- 1 Ω Replace main fan 12 CHECK HARNESS BETWEEN MAIN FAN Connector & terminal (F17) No. 2 — (F66) No. 9: Is the measured value less than the specified 1 Ω Repair open circuit Step Value Yes No |