Check Engine Light and No Cooling Fan

**niwde11** · April 23rd, 2009 06:05 PM

Suddenly my original thread got lost

Take two
car = 00 civic lxi
check engine light and no cooling fan

Eto mga ginawa bago nangyari. Wed, kinalas front suspension plus the engine support(passenger side). Remove also the battery. Naibalik din lahat on day 1. Day 2, palit engine oil+ filter and the atf. then nun start na ilaw ang check engine sa dash. di raw umaandar ang cooling fan ng radiator kahit mainit na makina. tumawag ng electrician. walang ground sa relay ng fuse box(beside the battery). check the relay inside the cabin, di raw nagbibigay ng negative signat to the fuse. "pansamantagal" since malapit yung fuse box sa battery nilagyan muna ng wire from the neg ng battery to the negative ng relay sa fuse box. as of now ikot ang cooling fan pag punta sa on ng ignition so di muna sya automatic.

Now, what went wrong. anyone from here experienced same thing. tia

**mazdamazda** · April 23rd, 2009 06:25 PM

Weird problem... are you bringing it to Speedyfix tom?

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**niwde11** · April 23rd, 2009 09:18 PM

updat/addl info.

when i start the engine para igarahe, di umilaw yung CEL. kala ko okay na. open the hood, remove the temporary wire connected sa neg ng battery and dun sa neg ng relay(fan), ayun umilaw ule ang CEL. so pag me existing neg ground yung relay, di na iilaw yung CEL after starting the engine.

**4JGtootsie** · April 23rd, 2009 10:36 PM

Pag open ang any vital circuit CEL will light up.
Computer box reads temperature sensor and actuates the fan to stop or run. Without one or more of these sensor and or actuators functioning will activate CEL.

**voltscastillo** · April 24th, 2009 07:51 AM

hmm...

broken temp sending unit OR broken thermoswitch, or both, are my guesses.

thermoswitch controls the fan. pirming nasisira sa mga honda EK ito. maybe the works done on your car dmaged it?

**bambino** · April 24th, 2009 08:44 AM

kailangan jan ng scanner and diagram to properly diagnose the problem

**oj88** · April 24th, 2009 09:49 AM

I'm almost certain that some ground wires were not re-installed properly.

Check these points (particularly, those marked with Gxxx):

**niwde11** · April 24th, 2009 10:31 AM

mon, yep thats why we look for the cause and it is really the cooling fan not functioning kaya CEL

volts; yeah, kaya sinugurado ko dun sa mekanino na ano pa ba ginawa nya.

oj88; pareho tayo iniisip.

btw, nag palit pala ng valve cover gasket. since eto malapit dun sa sensor ng temp, baka dito nga. will update once okay na