P0585: Cruise control multi-function switch inputs A and B do not agree
Cruise control multi-function switch A/B correlation
Severity: Monitor
In the Jeep Wrangler complaint the effect was that speed control stopped working. The sources do not describe a driving hazard, so cruise control loss is the main consequence.
P0585 in short
P0585 means the two signals from the cruise control multi-function switch do not match each other. TroubleCodes.net lists a mechanical fault. A 2008 Jeep Wrangler owner traced it to a bad clock spring. Cruise control usually stops working, and there is no sign of a driving hazard.
The cruise control switch sends two signals so the computer can check one against the other. If they disagree, it sets P0585 and usually disables cruise control.
TroubleCodes.net gives a mechanical fault as the probable cause. In the Wrangler complaint the code was read as speed control switch 1/2 correlation and the fault was a bad clock spring, the coiled wiring behind the steering wheel that carries switch signals.
The clock spring sits with the airbag, so its replacement belongs in a shop.
Most likely causes
Cause 1: Worn clock spring (steering wheel wiring)
Supported by vehicle data- Why it ranks here
- The one complaint that states the cause names a bad clock spring, and the switch signals pass through it.
- What would change this
- Rises if cruise buttons work only at some wheel positions. Falls if the signals are steady with the wheel turned.
Cause 2: Faulty cruise control multi-function switch
Common general cause- Why it ranks here
- TroubleCodes.net gives a mechanical fault as the probable cause, which fits a worn switch.
- What would change this
- Rises if the switch resistance in each position is outside spec. Falls if it tests to spec.
What to test first
Start at step 1. Each result tells you what it means and where to go next.
Step 1: Try each cruise control button and note which fail, and whether turning the steering wheel changes it.
IfButtons work only at some wheel angles
It meansA worn clock spring is more likely.
IfCertain buttons never work at any angle
It meansThe switch is more likely.
Step 2: Have a shop measure the switch signals and the clock spring continuity.
Warning:The clock spring and switch are in the steering column with the driver airbag. Disconnecting the battery and following airbag procedure is required; do not remove the wheel without it.
IfSignals drop out through the clock spring
It meansReplace the clock spring.
IfSwitch signals disagree at the switch
It meansReplace the switch.
Symptoms
- Cruise control will not engage
- Check engine light
How to fix
On your vehicle
JeepYour car
2008 · Wrangler
Supported by vehicle dataOne 2008 Wrangler complaint reports P0585 read as speed control switch 1/2 correlation, with a bad clock spring. A single complaint.
Related codes
No curated relationships for P0585 yet.
P0585 questions
Can I still drive with P0585?
Yes in the sources reviewed; the main effect is that cruise control stops working.
Sources and review
- ODI 10545263: 2008 Jeep Wrangler, P0585 speed control switch correlation
- P0585 trouble code definition
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
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