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1997 Chevy Malibu DTC P1652 set after tapping in to lead wire of #2 fan circuit for switch to manually turn on

97 Malibu 3.1 L v-6 cooling fans wont turn on..(ORIGINAL PROBLEM)After following suggestions here, still no luck in finding WHY. put in switch at fan2 electrical connection, direct power from battery. This WORKS to turn fan on/off GREAT...but keeps setting P1652 (& P1653 one time) Erase code, MIL goes away, atart car, no MIL, but within 2 mins. comes back on. Something WACKY w/Relay center under hood too...while testing the 3 fan Relays,all tested good, but the MODE relay, 5 pin, where plugs in, seems to have reversed polarity? More positive then suppose to have? What could cause this to happen? AM I fighting a losing battle? Dont want overheating, but cant drive around in limp mode either! Worst gas mileage EVER!

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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

  • 76 Answers

SOURCE: cooling fan relay 1998 neon

on the left(driver's) side of the lower rad support. It's a small flat relay with a plug on the bottom and usually has a blue colored front. held on by two screws. Also, there may be more rad fan relays in the underhood fuse/relay box.
Good luck.

Posted on Feb 27, 2009

  • 1 Answer

SOURCE: need to find circuit/relay location for cooling fan. fuse is good, fan motor tested fine. need wiring schematic

where is the cooling fan relay located on a 92 taurus

Posted on Dec 15, 2009

  • 426 Answers

SOURCE: 1993 3.3 transmission caravan wont

are you getting codes for incorrect gear ratio and shift solenoids? if so then you are in need of a complete transmission overhaul.
However before you do that, check on the drivers side of the engine compartment under the battery tray is a wiring harness that runs next to the transmission, after a leaky battery and years of service, the pink wire that goes from the tranny control module, on the passengers fender, to the tranny gets corroded and brakes inside the insulation, check powers and grounds and if all is ok then bring it to a tranny shop, the sun gear brakes alot in those units, had the same problem on my cousins 3.3L and had to do an overhaul.
sorry to be the bearer of bad news.

Posted on Feb 05, 2010

  • 503 Answers

SOURCE: starter works but wont turn over in the car 1992

Here's a maybe answer. You keep changing the starters and testing things and it's not working, here's something you might want to consider.

It might be the ignition switch itself. IE where you put the key in, you said you turn the key and nothing happens. I would suggest that it might be the ignition switch. But since i don't like ford to much i wouls suggest this as a maybe only, not to familiar with ford. Hope this helps.

Posted on Apr 01, 2010

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1 Answer

Where is the cooling fan switch located on my 2005 malibu 3.5liter v6

Cooling fan switch ? The cooling fans (2) on that motor are controlled by three relays . A coolant temp. sensor gives temp info to the PCM - engine computer .
During high speed operation the PCM supplies the ground path for the cooling fan 1 relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM supplies a ground path for the cooling fan 2 relay and the cooling fan S/P relay through the high speed cooling fan relay control circuit. This energizes the cooling fan 2 relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the cooling fan S/P relay coil is energized closing the relay contacts and provides battery positive voltage from the cool fan 2 fuse on the cooling fan motor supply voltage circuit to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed.
The PCM commands Low Speed Fans on under the following conditions:
• Engine coolant temperature exceeds approximately 106°C (223°F).
• When A/C is requested and the ambient temperature is more than 50°C (122°F).
• A/C refrigerant pressure exceeds 1 310 kPa (190 psi).
• After the vehicle is shut off if the engine coolant temperature at key-off is more than 140°C (284°F) and system voltage is more than 12 volts. The fans will stay on for approximately 3 minutes.
The PCM commands High Speed Fans on under the following conditions:
• Engine coolant temperature reaches 110°C (230°F).
• A/C refrigerant pressure exceeds 1 655 kPa (240 psi).
• When certain DTCs set .
Watch this video ,it shows how it works !
Relay Driven Dual Cooling Fan Diagnostics

Nov 27, 2016 | 2005 Chevrolet Malibu

1 Answer

My 97 Acura client 3.0 over heats while stopped but when I drive off it cools back down is that my fan switch making that happen?

If your car has an electric fan, then that is a very likely cause - or a failed fan itself. When driving, the movement of the vehicle thru the air cools the radiator. When stopped, little to no airflow takes place - unless your fan forced the air through it. If your fan is not running, that would explain the high temperature. Next, find out what is preventing the fan from turning. Good luck!

Dec 09, 2015 | Acura Cars & Trucks

1 Answer

Cooling fans won't come on in my 97 Chevy malibu

The PCM controls that activation of the cooling fans. I uses three relays to do this. The configuration of the relays is such that failure of any one of them should not result in total fan failure (one or both would still operate). Try this - with the engine running, turn on the A/C. If the fans work, then your problem is that the coolant temp sensor is not telling the PCM the coolant temperature properly. If they still don't work, then, although it doesn't seem likely, I would have the COOLING FAN RELAY, COOLING FAN RELAY 1, and MODE CONTROL RELAY checked. Reason being that the only other possibilities are the PCM and the circuit wiring itself.

Mar 20, 2015 | 1997 Chevrolet Malibu

1 Answer

Cooling fan relay location 03 chevy malibu 3.1

It is in the UBEC or undehood bused electrical center(fuseblock) it should say fan1 and fan2

Oct 18, 2014 | 2003 Chevrolet Malibu

1 Answer

Radiator fans do not work on my 1997 chevy malibu

There is a sensor on the top of the engine which turns the fans on. it is usually located near the thermostat housing but dont confuse it with the temperature sensor which can easily be tested in the same means by watching the temperature gauge as you ground it out. it may take several seconds to indicate it on your sensors.
If you by-pass and hook the fans up direct without an in-line fuse and there is resistance in the line from a bad fan motor you will melt the wires and the fan motor itself. Use a 30 or 40 amp fuse inline and put on a switch if you like but don't hook direct but only for a few seconds or so to see if is working well. Use very thick wire like booster cable wire.

Take the lead off the sensor and contact it to the ground on the engine. If the fans start up with car running even cold then replace this sensor.
If not check relay by switching with same numbered relays typical in most vehicles. Mark the original relay and note it's position, take pics if you like to aid in placement.

East Coast Canada Rules.
Good luck!

Feb 27, 2014 | 1997 Chevrolet Malibu

1 Answer

1997 Malibu DTC P1652

u need a data stream run on car that displays values for a tech to decyfer--code scanners dont cut it--factory equip at a private shop does----like the magicmechanic online--send him this issue

Nov 20, 2013 | Cars & Trucks

2 Answers

99 chevy Cooling fans wont come on Chevy Malibu ??? Can i wire them hot to come on ?

Yes, you could wire them to run anytime the ignition is on, but that is not a good idea. Have you checked the fuse? Have you checked to see if the fans actually work? Turn the A/C on and one fan should run continuously. Have you replaced the thermal relay for the cooling fan? You need to just find out why they do not work. Running them continuously is not a good idea. You want the engine to reach full operating temperature as soon as possible. And you do not want to be constantly cooling it down by running the fans all the time. This will cause poor fuel mileage.

Feb 08, 2011 | 2001 Chevrolet Malibu

1 Answer

Cooling fan wont come on at temp

This vehicle has a radiator fan switch, it completes the circuit when the water temp get up to N.O.T normal operating temperature and turn the fans on, try changing radiator fan switch. Good luck and thanks for using FIX YA

Mar 03, 2009 | 1992 Mazda Protege

1 Answer

I just changed the ignition switch and key on a 97 malibu

the key code for that ignition isnt set up for that car. you will probably have to go through a dealer to find out what to do .

Jan 27, 2009 | 1997 Chevrolet Malibu

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