P0691 Acura Fan 1 Control Circuit Low
Possible causes
– Faulty Low Speed Radiator Fan Relay
– Low Speed Radiator Fan Relay harness is open or shorted
– Low Speed Radiator Fan Relay circuit poor electrical connection
– Faulty Electric Fan
– Faulty Engine Control Module (ECM)
– Low Speed Radiator Fan Relay harness is open or shorted
– Low Speed Radiator Fan Relay circuit poor electrical connection
– Faulty Electric Fan
– Faulty Engine Control Module (ECM)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Radiator fan inoperative
– Possible engine overheating
– Radiator fan inoperative
– Possible engine overheating
Acura Vehicle:
Acura ILX, Acura MDX, Acura RDX, Acura RLX, Acura TL, Acura TSX, Acura ZDX, Acura CSX, Acura EL, Acura Integra, Acura RSX, Acura Legend, Acura Vigor, Acura CL, Acura SLX, Acura NSX, Acura RL, Acura ZDX