Cel On After Radiator Replaced

[ArdentEagle]

I had the radiator replaced in my my M35 yesterday. I now have the check engine light on.

Any ideas as to what it could be?

I've tried to manually get the fault code but no matter how many times I try it won't work for me. ( Doors closed too)

I've also disconnected and reconnected the AFM plug and unplugged my battery for an hour to reset the ECU.

If anyone can help it'd be much appreciated.

Cheers.

[markdem]

might wanna check that they plugged everything back in. stuff close to the radiator, such as the electric fans

[ArdentEagle]

might wanna check that they plugged everything back in. stuff close to the radiator, such as the electric fans

Thanks mate. Just had a quick look and everything looks o.k....I think, but I'm not very tech savvy so I may be overlooking something.

I spoke to the mechanic on the phone and he said all he unplugged was AFM connection. If I don't have any luck I'll take it back into the mechanic on Friday but I'd love to solve this mystery before then to save the hassle if possible.

[Ross]

If he started the car before he reconnected it will throw the CEL. Check the codes for conformation.

Reset ecu if that's all it was. The CEL should disappear by itself after a while if it does not detect another sensor malfunction.

[ArdentEagle]

If he started the car before he reconnected it will throw the CEL. Check the codes for conformation.

Reset ecu if that's all it was. The CEL should disappear by itself after a while if it does not detect another sensor malfunction.

Cheers mate.

I tried to reset the ecu already by disconnecting the battery, I can't get the manual codes to work for me, I've tried numerous times... It is good to know that the CEL will disappear after a while provided there are actually no current faults.

I'll check with him to see if he started before it was re-connected.

[PN-Mad]

Hey Champ.

Don't worry. Disconnecting will do sweet FA to clear codes. But you did reset your radio pre-sets if that's any consolation....

As said before, if he turned it on with the AFM unplugged, it'd throw a CEL. That will disapear, but if you want to reset:

ALSO- while I have your attention. They are notoriously hard to bleed the coolant system. There is a bleed, drivers side, near the back of the motor in a heater hose (Phillips head plug). Do you have a hot heater?- best to ask your mech if he opened the bleed and got the coolant flowing.

http://www.6mt.net/forum/performance-mods/2833-easy-ecu-reset-procedures.html

Edited February 1, 2012 by PN-Mad

[ArdentEagle]

Hey Champ.

Don't worry. Disconnecting will do sweet FA to clear codes. But you did reset your radio pre-sets if that's any consolation....

As said before, if he turned it on with the AFM unplugged, it'd throw a CEL. That will disapear, but if you want to reset:

ALSO- while I have your attention. They are notoriously hard to bleed the coolant system. There is a bleed, drivers side, near the back of the motor in a heater hose (Phillips head plug). Do you have a hot heater?- best to ask your mech if he opened the bleed and got the coolant flowing.

http://www.6mt.net/f...procedures.html

Thanks heaps for this info mate.

The air-con isn't performing as well as it did before the radiator was replaced so I'd dare say the bleed wasn't opened up. Mind you it was also 40c

The stereo presets are gone but the important part was saved. All the crossover values, time alignment and eq settings for my audio system are all still there. I'm running everything active, it took me months to get the tune right!

I'll attempt the reset tomorrow but I seem to have trouble with the timing of the whole procedure.

[HER_M35]

Hi Ryan,

If you turn the heater all the way up to the hottest when the car is up to operating temp and the heater doesn't blow hot there'll be an airlock.

The G35 FSM has the correct procedure for getting the airlocks out which works with a bit of time and patience. I've done this a few times now with success.

Here's the extract from the manual;

Warm up until opening thermostat. Standard for warming-uptime is approximately 10 minutes at 3,000rpm.

Make sure thermostat opening condition by touching radiatorhose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

7. Stop engine and cool down to less than approximately 50°C(122°F). If necessary, refill radiator up to filler neck with engine coolant.

8. Refill reservoir tank to "MAX" level line with enginecoolant.

9. Repeat steps 4 through 7 two or more times with radiatorcap installed until engine coolant level no longer drops.

10. Check cooling system for leaks with engine running.

11. Warm up engine, and check for sound of engine coolantflow while running engine from idle up to 3,000rpm with heater temperaturecontroller set at several position between "COOL" and "WARM".

Sound may be noticeable at heater unit.

12. Repeat step 10 three times.

13. If sound is heard, bleed air from cooling system byrepeating step 4 through 7 until engine coolant level no longer drops.

Clean excess engine coolant from engine.

If you don't have the Factory Service Manual and want a copy, PM me and i can send it to you.

Jas

[ArdentEagle]

Hi Ryan,

If you turn the heater all the way up to the hottest when the car is up to operating temp and the heater doesn't blow hot there'll be an airlock.

The G35 FSM has the correct procedure for getting the airlocks out which works with a bit of time and patience. I've done this a few times now with success.

Here's the extract from the manual;

Warm up until opening thermostat. Standard for warming-uptime is approximately 10 minutes at 3,000rpm.

Make sure thermostat opening condition by touching radiatorhose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

7. Stop engine and cool down to less than approximately 50°C(122°F). If necessary, refill radiator up to filler neck with engine coolant.

8. Refill reservoir tank to "MAX" level line with enginecoolant.

9. Repeat steps 4 through 7 two or more times with radiatorcap installed until engine coolant level no longer drops.

10. Check cooling system for leaks with engine running.

11. Warm up engine, and check for sound of engine coolantflow while running engine from idle up to 3,000rpm with heater temperaturecontroller set at several position between "COOL" and "WARM".

Sound may be noticeable at heater unit.

12. Repeat step 10 three times.

13. If sound is heard, bleed air from cooling system byrepeating step 4 through 7 until engine coolant level no longer drops.

Clean excess engine coolant from engine.

If you don't have the Factory Service Manual and want a copy, PM me and i can send it to you.

Jas

I'll check this out.

Cheers

[ArdentEagle]

Just a quick question:If the car was restarted before the AFM was plugged back in, how long does it generally take for the CEL to reset?

[iamhe77]

~100kms usually

[ArdentEagle]

~100kms usually

Cheers.

Well I'm up to 170kms at the moment so it looks like that may not be the problem.

I've had the car checked and everything is plugged in BUT the electric fan at the front of the car is not working even though the air-con is

I presume this would set the CEL off too? It could be just weird timing and perhaps a blown fuse somewhere?

[ArdentEagle]

After 265kms the CEL has gone off.

I guess the AFM wasn't plugged in before the car was started.

Thank you for all the help and advise guys

Now all I have to do is figure out why the thermo fan is now not working.

Edited February 4, 2012 by ArdentEagle

[iamhe77]

Check the thermo fan at initial startup in the morning.

Mine didn't necessarily turn on when the A/C was on, but it always spun slowly at startup.