Home/Isuzu/Amigo/Isuzu Amigo II (1998-2000)/Repair manual/Testing & Diagnostics/DTC P0481: COOLING FAN 2 CONTROL MALFUNCTION

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DTC P0481: COOLING FAN 2 CONTROL MALFUNCTION Isuzu Amigo II

Testing & Diagnostics ~113 words

Note. For circuit reference (Схема №13)

Circuit Description

PCM controls cooling high speed operation through the use of a high fan relay and a control circuit. If PCM commands fan high speed operation and senses fan did not turn on, or commands fan operation off and fan continues to run, DTC P0481 will be set.

Conditions required for setting DTC are

Ignition voltage is greater than 10 volts.
Engine run time is greater than 32 seconds.
PCM senses voltage is high with high speed fan off.
PCM senses voltage is low with high speed fan on.
Conditions are met for 25 seconds within a 50-second period.