Increase Resistance on Air Exhaust Solenoid Circuit - YKon

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SUMMARY

The discussion centers on troubleshooting the air exhaust solenoid circuit in a Yukon vehicle, specifically addressing a computer trouble code indicating a faulty solenoid. The solenoid's resistance is measured at 18 ohms, which is at the lower limit of the acceptable range (18-45 ohms). Participants suggest increasing the resistance by adding a resistor in series or using a length of wire. If this adjustment resolves the fault detection, it is recommended to replace the solenoid to ensure reliability.

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  • Understanding of automotive electrical systems
  • Knowledge of resistance measurements and Ohm's Law
  • Familiarity with solenoid operation and diagnostics
  • Basic skills in circuit modification and soldering
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  • Research how to measure and interpret resistance in automotive circuits
  • Learn about series resistors and their impact on circuit performance
  • Investigate common failure modes of automotive solenoids
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Automotive technicians, DIY mechanics, and anyone involved in troubleshooting or repairing air ride systems in vehicles.

1stchiefsfan
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I am working on air ride system on my Yukon. the computer trouble code says the air exhaust solenoid is bad. I bench tested it and it works fine. I think the problem is the resistance. the resistance is suppost to be between 18 and 45 ohms. it reads right on 18. I think the computer is reading that as bad. what can I do to increase the resistance on this solenoid circuit??

Any input will be appreciated.
 
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Welcome to PF;
You can increase the DC resistance by adding a resistor in series.
For such a low resistance - a length of wire may do the trick.
 
It may be that the solenoid is on the way out with internally shorted turns.
Add a couple of ohms resistance. If that fixes the fault detection then replace the solenoid with a good one.
Deviation from a manufacturers standard circuit does not usually engender reliability.
 

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