Is this normal CCU behavior?
Instructor
Joined: Oct 2005
Posts: 246
Likes: 0
From: Napa weekdays,Fort Bragg other days
i agree w withered.
My defrost wont go past about 25% power, same with fan when temp set at 27. and when i shut down the rear fan blows till the battery is dead.
Loren,s explanation does not help me understand what to do, does anybody know how i can reslove this?
many thanks david
My defrost wont go past about 25% power, same with fan when temp set at 27. and when i shut down the rear fan blows till the battery is dead.
Loren,s explanation does not help me understand what to do, does anybody know how i can reslove this?
many thanks david
Race Car
Joined: May 2003
Posts: 4,226
Likes: 102
From: SoCal
1. Have all the fuses (front & rear) been checked?
2. Have all the connectors been checked and cleaned, e.g. blower amplifier?
3. Have all the servo actuators been monitored for their functionality?
4. Does the CCU get the "X" power from the ignition switch?
5. What mods have been made to the wiring?
6. Have the voltages (#30 & #15) been checked with a voltmeter?
7. Has the CCU been FULLY tested in another vehicle?
8. Have all the sensors been tested and connections checked?
And if the CCU was properly scanned for faults and no diagnostic results
provided a direction/resolution to the problem, then the CCU is bad.
2. Have all the connectors been checked and cleaned, e.g. blower amplifier?
3. Have all the servo actuators been monitored for their functionality?
4. Does the CCU get the "X" power from the ignition switch?
5. What mods have been made to the wiring?
6. Have the voltages (#30 & #15) been checked with a voltmeter?
7. Has the CCU been FULLY tested in another vehicle?
8. Have all the sensors been tested and connections checked?
And if the CCU was properly scanned for faults and no diagnostic results
provided a direction/resolution to the problem, then the CCU is bad.
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2002
Posts: 168
Likes: 0
From: Sedona, AZ
I had the same problem. I could actually get the fan to work by applying inward pressure on the ****. Thinking it was just a contact challenge, I purchased a can of electronic compressed air in an attempt to "blow-out" any dust interferring with the contact.
That didn't work.
Another Rennlister (forget who) suggested using an electronic cleaner-lubricant...I got a can at Radio Shack...Voila!!! CONTACT! Been fine the entire summer.
This is any easy fix, if it works for you...good luck.
That didn't work.
Another Rennlister (forget who) suggested using an electronic cleaner-lubricant...I got a can at Radio Shack...Voila!!! CONTACT! Been fine the entire summer.
This is any easy fix, if it works for you...good luck.
Addict
Rennlist Member
Rennlist Member
Joined: Sep 2002
Posts: 168
Likes: 0
From: Sedona, AZ
Forgot to answer your question...
Removed the fan **** and the first nut and sprayed the crap out of the whole area while turning the ***** to full stops. The material obviously wprked it's way into the necessary contact area.
Removed the fan **** and the first nut and sprayed the crap out of the whole area while turning the ***** to full stops. The material obviously wprked it's way into the necessary contact area.
Thread Starter
Rennlist Member
Joined: May 2001
Posts: 3,052
Likes: 8
Guys, just something to keep in mind: the problem I wrote about in this post was 100 percent related to the removal of the rear blower motor in favor of an RS bypass tube. The behavior I described is not related to any defect or problem in the CCU, only the effects of removing one component in the system the CCU controls.
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