Addicted to eaton Posted July 12, 2011 Report Share Posted July 12, 2011 fan does not kick in. when i turn the a/c on it kicks on just fine but the normal one does not turn on. i let it get 3/4 way on the temp befor shutter her down. also... Wiring for the VSS please? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 12, 2011 Report Share Posted July 12, 2011 sounds like only fan 2 kicks on? swap relays? disconnect coolant temp sensor, see if either will turn on? http://i.imgur.com/Fi44D.png Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 12, 2011 Author Report Share Posted July 12, 2011 i was in such a mess earlier, i did not even try the relay thing.. thank u sir. ur talkin about the sensor on the t-stat housing right? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 12, 2011 Report Share Posted July 12, 2011 the OBD2 motors have a combined temp sensor/sender, so yes, should be on the LIM/T-stat housing. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 12, 2011 Author Report Share Posted July 12, 2011 would my gauge work if it was not working? gauge works... Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 12, 2011 Report Share Posted July 12, 2011 (edited) the 3 wire coolant temp sensors actually have 2 circuits inside of them, so the guage can work without the one going to the PCM working. you have an OBD2 scanner, right? check out the coolant temps as reported in the datastream, see if they're believable. with a stock 01 Impy LA1 tune, fan 1 should turn on at 108*C, off at 104*C, fan 2 on at 133*C, off at 109*C. EDIT: alldata is showing an 01 impy as only having a single 2-wire setup? Edited July 12, 2011 by RobertISaar Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 12, 2011 Author Report Share Posted July 12, 2011 yes its only a 2 wire setup. and no fan turns on till i turn the a/c on. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 13, 2011 Author Report Share Posted July 13, 2011 I can turn the passenger side fan on if i A, Jump the relay Number 3, Or B turn the a/c on. drivers side fan will NOT kick on. i jumped the relay and nothing. Relay 1 and relay 2 Jumping them on causes nothing. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 13, 2011 Author Report Share Posted July 13, 2011 and unpluging the temp sensor = car not start... Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 13, 2011 Report Share Posted July 13, 2011 sounds like a dead fan IMO. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 13, 2011 Author Report Share Posted July 13, 2011 FUUUUUUUUUCCCCCKKKKKKKKKK lol Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 13, 2011 Report Share Posted July 13, 2011 the fans have a connector about ~6-12" away from the motors, correct? apply +12V and ground there. if they still don't kick on, dead fan is confirmed. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 no they dont. But i switch them (same connector) and still not kick on... Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 time to put Grand am fans in it lol Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted July 14, 2011 Report Share Posted July 14, 2011 sounds like it. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 put Grand am fan in.. Now still not working. Relay #1 now kicks BOTH fans on a Low speed, relay 2 Kicks none on, relay 3 kicks the secondary fan on high. (im jumping the relays to find this out) Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 im thinkin of putting a jumper wire somewhere to make the fan come on when the motor is running. what could i hook it too?i Dont want it when they key is on But Only when the motor is running. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 anyone? Quote Link to comment Share on other sites More sharing options...
88red4cyl Posted July 14, 2011 Report Share Posted July 14, 2011 Could you just wire the two fans together through the secondary fan so that they both come on when the ac/defrost in engaged? I always run with the ac or defrost setting on at least 1 so that the secondary fan is always on... The Lumina rarely ever goes over the 1/2 mark that way... Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 Im selling the car... well its sold lol Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 14, 2011 Author Report Share Posted July 14, 2011 so i want them working properly. Quote Link to comment Share on other sites More sharing options...
88red4cyl Posted July 15, 2011 Report Share Posted July 15, 2011 What car is this? Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 15, 2011 Author Report Share Posted July 15, 2011 2001 impala the one i gave 200 bucks for. Quote Link to comment Share on other sites More sharing options...
Addicted to eaton Posted July 15, 2011 Author Report Share Posted July 15, 2011 http://www.automotiveforums.com/t979402-discuss2002_impala_cooling_fans.html I need this info i found when i am at the girl friends house on her pc and found this info! woot! Here’s some info and observations that may simplify the cooling fan circuit and help out the next victim. Basically there are 3 relays, two 4-prong fan relays and one 5-prong mode relay. 2001 on up markings. (?) FAN CONT #1 - Primary Cooling Fan FAN CONT #2 - Cooling Fan Control Relay (5-prong) FAN CONT #3 - Secondary Cooling Fan The fans have two modes, when energized both fans come on at either low-speed (serial connection) or high-speed (parallel connection). The PCM controls the modes by grounding the coil in relay 1 for low-speed. Or; All 3 relays for high-speed. For low-speed, relay 1 is energized and 12v is fed to the B-side of fan 1. The A-side of fan 1 connects to the B-side of fan 2 through the dual-throw mode relay. Both fans are in a serial connection. In high-speed, the mode relay switches fan 1’s A-side to ground and relay 3 energizes fan 2. Both fans are in a parallel connection. Terminal 85 of each relay socket should normally be hot. Terminal numbers are marked on the relay. Check the cooling fan fuses. Check the relay sockets for burned or bent terminals. If there is no continuity in one of the fans (worn brushes or a bad connection) neither fan will come on in low-speed mode. In low-speed, the fans are barely audible. In high-speed, the fan/s can be heard 30’ away. A couple tests to start with; Remove the fan1 relay and use a short piece of wire to jumper the terminals 30 and 87. Both fans should come on in low-speed mode. The second is is to pull the connector off of the Coolant Temperature Sensor at the thermostat housing, then start the engine. After a slight delay of about 30 seconds, with no measured resistance, the PCM assumes the sensor has failed and turns both fans on in high-speed mode. Swapping sockets can test relays 1 and 3. If one fan still doesn’t run, turn the engine off and check the motor for resistance and the connector for continuity to it’s relay terminal. One terminal of the fan 2 connector should have continuity to ground, the other to relay 2 socket 87a and relay 3 socket 87. With the CTS connector removed, remove all three relays and start the engine. Again after a slight delay, there should be 12v between terminal 85 and 86 at all three relay sockets. If not, check for +12v at terminal 85 to ground and continuity to ground on the 86. No ground signal could be a bad connection to/or the PCM. Whether terminal 85 or 86 is used for +12v could change between year/model. If yours is different from the schematic make a note of which terminal to check for a ground connection from the PCM. Each relay should have resistance between the coil terminals 85 and 86 (around 80 Ohms.) The mode relay normally has continuity between terminal 30 and 87A. When energized, it should have continuity between 30 and 87. The temperature that the PCM energizes the fans may be different between model/years. On this one, a 2000, the scanner shows the low speed circuit energize at 217 degrees and high-speed at 230. When the PCM energizes the fans it sets a timer. For example, when the temp was at 228 it bounced up to 230 for a split second but the fan remained on for several seconds. This was at 40 degrees ambient; it may be different on a 90-degree day. Turning on the A/C may or may not turn the fans on, it depends on system charge pressure and whether there’s a temp sensor in the circuit. http://img716.imageshack.us/img716/7563/01impalafanrelay02.png (http://img716.imageshack.us/i/01impalafanrelay02.png/) CTS resistance values 212F--177 Ohms 194F--241 Ohms 176F--332 Ohms 158F--467 Ohms 140F--667 Ohms 122F--973 Ohms 113F--1188 Ohms 104F--1459 Ohms 95F---1802 Ohms 86F---2238 Ohms 77F---2796 Ohms 68F---3520 Ohms 59F---4450 Ohms 50F---5670 Ohms 41F---7280 Ohms 32F---9240 Ohms 23F---12300 Ohms 14F---16180 Ohms 5F----21450 Ohms Quote Link to comment Share on other sites More sharing options...
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