Think i need a new CCRM

kurv · Dec 2, 2006

So after battling cooling issues for months I finnally thought I was done. Car Never goes past 210*. Installed a manual fan switch, had some issues with the low speed fan not comming on. Also pulled codes and came up with 564 the fan circuit faliure. Everything has been working great for about a month. Now I can't get the fan to turn off. Whenever the car is in the ON position or started the fan is constantly running. Needless to say car is running extra cool. Where can i purchase a new CCRM?

1TallMF · Dec 2, 2006

So, are you saying you have the manual fan switch wired to the CCRM relay? Or did you ditch the manual switch altogether? If the computer is still controlling the fan, have a look for an open circuit at the ECT sensor, since the default setting for no ECT reading is to turn the fan on at all times.

HISSIN50 · Dec 2, 2006

1TMF is right-on. I'd look at the ECT circuit first.

Otherwise, look at the CCRM pins for diagnostics. WHen the car is below ~208*F, pin 14 should be dead. If you see 12 volts to it, look for a manual fan switch-tap, hardwire or other anomaly.

Good luck.

kurv · Dec 2, 2006

So i disconnected everything fan switch related and the fan seems to be operating fine..low speed fan comes on around 210*... maybe the switch is dead?? Anyways, I can hear clicking comming from what seems to be the CCRM is that normal. BTW temp sensor is 3 weeks old.

The Green GT · Dec 2, 2006

The CCRMwill not click. it it nothing but electrical parts. When I changed mine I had the same exact probles you had. I found a used one on eBay, paid $25 and voila. They are rare to find though. I have a friend working on my old one to see if anything is wrong with it and fix it if there is. ill let you know when hes done if you still need one.

EDIT: Im not sure if my fan was doing the same thing, but I got the same code.

Pokageek · Dec 2, 2006

I have one. .. Not sure what it is worth ..

HISSIN50 · Dec 3, 2006

A failing relay can chatter (there's 5 relays inside the CCRM). Also, when it starts clicking, you can (safely - be aware of hot, moving parts) goose the wiring harness to the CCRM. If you can make the clicking stop and start on demand by manipulating the harness, that indicates a bad terminal connection.

Good luck.

yellowclone · Dec 4, 2006

I don't mean to hijack, but I thought while we are on the subject. My fan runs with the car off and even the key out of the ignition, not all the time, just when it wants to. It has caused me two dead batteries. I can hear the relays clicking when I put the battery cable on. What could be causing this? Bad CCRM? Also, what all does the CCRM control? If it just controls the fan, then I am going with a DC Controller and getting rid of it all together because I have been fighting fan problems for three years and haven't had a desire to drive my car recently and have even sold the wheels, so any help is appreciated. Once again, sorry for the hijack.

HISSIN50 · Dec 4, 2006

yellowclone said:
I don't mean to hijack, but I thought while we are on the subject. My fan runs with the car off and even the key out of the ignition, not all the time, just when it wants to. It has caused me two dead batteries. I can hear the relays clicking when I put the battery cable on. What could be causing this? Bad CCRM? Also, what all does the CCRM control? If it just controls the fan, then I am going with a DC Controller and getting rid of it all together because I have been fighting fan problems for three years and haven't had a desire to drive my car recently and have even sold the wheels, so any help is appreciated. Once again, sorry for the hijack.

Off the top of my bean, the CCRM controls the EEC relay, FP relay, EDF relay, HEDF relay and WOT relay. A latching relay inside the CCRM can cause a draw while the car is off (for one).

You will be really pleased with the DC control unit - it's plug and play as far as the install is concerned.

Good luck.

yellowclone · Dec 4, 2006

HISSIN50 said:
Off the top of my bean, the CCRM controls the EEC relay, FP relay, EDF relay, HEDF relay and WOT relay. A latching relay inside the CCRM can cause a draw while the car is off (for one).

You will be really pleased with the DC control unit - it's plug and play as far as the install is concerned.

Good luck.

So I guess that answers my question about doing away with the CCRM. What would be a fix to the "latching relay" causing the draw?

HISSIN50 · Dec 4, 2006

I'd start with doing some testing with my meter. When the fan acts up, put your meter on CCRM pin 14 and 17 (checking for 12 volts and ground, respectively) to see which fan-speed is stayling latched. If neither terminal is reading anything but the fan stays on, check the appropriate pins on the CCRM for the EDF Normally Open terminal and the HEDF N.O terminal. Decide which has power and trace that relay's terminals. I can help further if you can narrow down which fan speed is staying on (even if you have to test it directly at the fan connector to see which speed is staying on - just be careful of the fan blade).

Also ensure that the ECT is also connected and not open, as an open in that circuit will cause the fan to come on (the default setting is for the fan to be on low-speed. The computer actively turns it off. This is a system safeguard).

Random thoughts.
Good luck.

Think i need a new CCRM

kurv

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