Service ride control message but no codes

2005 GMC YUKON

193,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

JIM JACKSON2

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21 POSTS
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I recently bought the vehicle listed above a few months ago as a "winter beater". Today each time I start the vehicle the Service Ride Control message comes up on the dash. When I got home I plugged in my scanner and the only codes I got were for the rear aux climate control module which I know needs replaced. It's currently stuck on heat until I fix it and I'm okay with this at the moment seeing as the time of year.

I inspected the fuses and they all check fine. All of the lines and wires for the shocks and air compressor look good. The rear shocks do look to be newer than the front. What steps can I take to diagnose this warning without and trouble codes. Could the trouble codes for the rear climate control cause this message to show up or is the service ride control strictly related to the auto ride suspension?

Nov 19, 2020 at 4:55 PM

I-SMOGEM

CERTIFIED EXPERT
118 POSTS

Hi Jim,

The AC Module would be in the scan tool as a B code (body) that covers functions that are, generally, inside of the passenger compartment. These functions provide the driver with assistance, comfort, convenience, and safety.

What we need is the C code related to the Ride Control system. Chassis (C-codes) category covers functions that are, generally, outside of the passenger compartment. These functions typically include mechanical systems such as brakes, steering and suspension.

What I'd like you to try is go through the code clearing process to reset the trip counter. Ignition cycle counting is used by the ESC module to detect faults in the system. The objective is to eliminate false/intermittent codes while maintaining an acceptable level of system performance. The operation of the ignition cycle counting requires that a fault condition be present for 4 consecutive ignition cycles before it will set the fault code and display the Service Ride Control message. If a fault code is present, without a fault being current, the system will go into one or more degraded modes without displaying a message. Resetting the ignition cycle counter is done by clearing codes with a scan tool. Clearing codes will override ignition cycle counting for one ignition cycle. Therefore, a fault condition will set the fault code immediately if it occurs on the first ignition cycle after the codes are cleared.

If the light comes back on, try and read codes before shutting off the engine if you can because that would be a hard code. Hopefully, one will set to give us a direction to go in.

Let us know... Glenn

Nov 19, 2020 at 9:10 PM

ASEMASTER6371

CERTIFIED EXPERT
52,796 POSTS

Good morning,

I attached a wiring diagram of the ride system for you.

Make sure all the shocks have the electronics hooked up. Sometimes people eliminate the electronic shocks for standard shocks.

https://www.2carpros.com/articles/how-to-check-wiring

Check the fuse in the diagram for power on both sides. This is not a visual test, it is a power test.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Let me know the results.

Roy

Image (Click to enlarge)

Nov 21, 2020 at 8:03 AM