Question about 1997 Chevrolet Malibu

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DTC P1652 set by PCM after tapping into #2 Cooling fan to install manual switch for operation...

This was AFTER testing everything & coming up empty handed...The switch works GREAT, does what is suppose to do, but w/MIL ON, driving in LIMP MODE isnt WORTH it! Found reversed polarity for the Fan MODE relay (where it plugs in to the fuse/relay center)...Its a 5 pin, so isnt just turned around..anyone know what could cause this to happen? (the switch got put in AFTER finding this issue) What REALLY gets me is, if the PCM notices output voltage CHANGE from the #2 fan circuit and sets the P1652, WHY CANT IT REALIZE THE ENGINE IS HOT & FANS NEED TO BE ON? Love the car, but this is getting ridiculous!

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  • 45 Answers

Sounds like fan is shorted check fan

Posted on Nov 20, 2013


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 702 Answers

SOURCE: Cooling fan wont work

The water temp sensor is located near the thermostat housing. This sensor is what tells the ECM to turn the fan on/off. The water temp sending unit is located near the same area. You know you have the correct sensor is because the water temp sensor has a 2 prong plug. The water temp sending unit only has 1 prong.

Posted on Sep 27, 2008

  • 4 Answers

SOURCE: engine cooling fan not coming on

It may be the fan itself. Try to find the plug going to the fan, it should be close to the fan and might plug diresctly into the relay. Use two jumper wires straight from the Bat one from the pos+ side and one from the neg- side and plug them into the two holes in the connector the fan should start WATCH YOUR FINGERS. If it starts its elec prob before the fan if not its the fan.

Posted on Jun 12, 2009

  • 323 Answers

SOURCE: reverse works no forward gears

ask the rebuilder, maybe a warranty item

Posted on Jul 04, 2009

  • 22 Answers

SOURCE: cooling fans not working

Ok might sound stupid but did you check the fuses (maxy fuses 40 amps probably). I propose you to also check the fans grounds if they are not damaged or coroded.If OK then, if the fans work when you feed them electricity, if you're temperature gauge in the car works great, if you're solenoids click and you don't se a cut or worn out wire, then the problem comes from the fact that the PCM does not or can not triger the fans on. It could be that the cooler sensor signal doesn't get to the PCM (improbable since i think the PCM feed the IPC info on the engine, temp, volt ...) it could be the PCM triggers the fan but the signal never gets to the solenoid (open circuit or bad ground) or it could simply be that the pcm never trigger the fans on (internal problem). Start you're engine and start the A\C (it need to be fonctional), if one of the two fans starts, the PCM is ok.
PCM = powertrain control module
IPC = instrument panel cluster

Posted on Aug 06, 2009

  • 631 Answers

SOURCE: cooling fans 4 radiator won t come on

You have 2 engine coolant sensors one on front of engine, near thermostat housing and the other on the right side of the engine above the starter motor. You probably need to change the other one.

Posted on Aug 19, 2009

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1 Answer

Hi guys just want to know the process to rest limp mode for Holden Captiva 2007 petrol

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You have different strategy on different vehicles

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If possible remove the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan is typically an indication of mechanical failure such as clutches, meaning a rebuild.

If it comes to a rebuild, have yours rebuilt versus a swap out. This way you'll know everything bolts up correctly and you have all the brackets, etc.

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