todds112
Member
- 672
- 5
- 18
- Location
- Teton Valley, ID
My CTIS has been working properly. I was getting 4 flashing light errors when my tires were leaking. Got most of that fixed and it was working fine. Then it starting making a noise in the pneumatic control unit. I could hear a solenoid cycling very fast. Machine gun fast: click click click click click. If I pushed any button on the ECU it stopped and resumed normal operation.
Today I get in and start it up and it exhausts one blast of air at the PCU, then goes immediately to the 5 light flash. Reset it...same thing.
I pulled the PCU and tore it down. I cleaned everything inside and lubed the valves. I used the TM and checked the continuity of the solenoid harness and it checked out fine. Put it back together and tried it again...same thing. I can't find any diagnostic to check the pressure transducer to verify if it's bad.
Could a solenoid still be bad if the continuity in it was OK? I was thinking broken wire or a short would cause the fast clicking. I checked it and messed with the wires, wiggled them around, etc. still shows good.
Parts manual shows the solenoids and plug are one part (599760). I'm not finding any online. I'm also not able to find a transducer (599601 NSN 669501329641.
Anyone else go down this road? Anyone know how to test the transducer? Hate to throw in the towel and do away with the CTIS.
Today I get in and start it up and it exhausts one blast of air at the PCU, then goes immediately to the 5 light flash. Reset it...same thing.
I pulled the PCU and tore it down. I cleaned everything inside and lubed the valves. I used the TM and checked the continuity of the solenoid harness and it checked out fine. Put it back together and tried it again...same thing. I can't find any diagnostic to check the pressure transducer to verify if it's bad.
Could a solenoid still be bad if the continuity in it was OK? I was thinking broken wire or a short would cause the fast clicking. I checked it and messed with the wires, wiggled them around, etc. still shows good.
Parts manual shows the solenoids and plug are one part (599760). I'm not finding any online. I'm also not able to find a transducer (599601 NSN 669501329641.
Anyone else go down this road? Anyone know how to test the transducer? Hate to throw in the towel and do away with the CTIS.