Hi folks,

My 97 XJ6 had a leak in the ac system after repairing the leak and recharging the system, I cannot get power to the ac compressor. Checked the fuses and they are not blown but no power in the circut box to the fuse. I jump started the compressor to see if the clutch would engage and run the compressor, it worked fine blowing cold air.

Can anyone suggest where or what to check next to get power to the circut. 10 amp fuses don't work in the front driver side fuse box as well as the passenger side back seat and the trunk but the fuses themselves are not blown.

Please help it will be hot very soon in TX!

 

Are there any codes in the climate control panel???????

Post the DTCs if there are any and check the Electrical Guide for diagnosis of the circuit.

bob

 

Hi Bob

There are 4 codes 45= ctr vent servo, 43=cool air bypass servo, 14=coolant temp signal and 24=face vent differential temp control. I got the definitions off of a white paper by Denso climate control system.

I disconnected the negative battery terminal, guessing that a hard reset might solve some of the problem after recharging the ac system from zero pressure due to the leak in the valve stem.

Thank you for your reply!

John

 

Do you have power to the PI145 relay for the compressor clutch??
The TRIPLE SWITCH allows the compressor control to activate the clutch relay if requested. If the refrigerant pressure is low, then the relay will not close to activate the clutch.

Do you have a copy of S97_SED.pdf???????

Guessing blind will make this a LOOONG post.
Page 7.1 has the Radiator Cooling; Air Conditioning Compressor AJ16.

Pages 12.1 and 12.3 have the rest of the Climate Control circuits.
The file size is over 14mb so it is too large to attach to this post.
It is a downloadable file from the 'stickies' forum area.

bob

 

I believe there is power to the relay but not sure how to test the relay itself. However there are several 10 amp fuses that are not blown but there is no power to the circut the fuse is attached to. The ac system is fully charged with refrigerant. I dont have a copy of the pdf doc you referred to but I will attempt to download it now.

Thanks a million!

John

 

A lack of gas pressure will prevent the system operating, and whilst I see that you have regassed the system, are you 100% confident the regas was successful? Could there still be a leak? If you read the codes off of the climate control panel, they will tell you whether the system thinks it has enough pressure. If there is the correct amount of gas in the system, it could be a faulty pressure switch, or a faulty climate control ecu. I don't have the instructions for accessing and reading the climate control codes in front of me, but they are available on line, and easy to do using the climate control buttons, no code reader required!