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1990 FX3 suspension Codes

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Old 05-22-2019, 08:44 PM
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jscdesigns
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Default 1990 FX3 suspension Codes

Pulled my 1990 FX3 suspension codes today. Everyone of them showed up on the dash. Where do I start checking? The suspension has always worked well.
Old 05-22-2019, 08:50 PM
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rblakeney
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I had the same experience on my 89. I've been told the memory on the FX3 computer is not large so the thing can get overloaded easily. I bought a brand new set of shocks, replaced the obvious leaking/bad one and all the codes cleared on just that one change. Perhaps you have the same situation or one or more actuators that have failed.

You can check the actuators by removing them one at a time, looking inside at the gear, and have someone turn on the ignition. The gear should spin one way and then the other in a self-check. If it doesn't do this, then the actuator is likely bad.
Old 05-23-2019, 08:57 AM
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ChumpVette
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Has the Service ride control light been on long? Try resetting the codes and see what comes back.

Last edited by ChumpVette; 05-23-2019 at 08:58 AM.
Old 05-23-2019, 08:58 AM
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Cool Runnings
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Originally Posted by rblakeney
I had the same experience on my 89. I've been told the memory on the FX3 computer is not large so the thing can get overloaded easily. I bought a brand new set of shocks, replaced the obvious leaking/bad one and all the codes cleared on just that one change. Perhaps you have the same situation or one or more actuators that have failed.

You can check the actuators by removing them one at a time, looking inside at the gear, and have someone turn on the ignition. The gear should spin one way and then the other in a self-check. If it doesn't do this, then the actuator is likely bad.
How do you check the rear shocks?
Old 05-23-2019, 08:58 AM
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Cool Runnings
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Originally Posted by ChumpVette
Has the Service ride control light been on long? Try resetting the codes and see what comes back.
How do you reset the codes?
Old 05-23-2019, 08:59 AM
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Originally Posted by Cool Runnings
How do you check the rear shocks?
You have to remove them.

Last edited by ChumpVette; 05-23-2019 at 08:59 AM.
Old 05-23-2019, 12:09 PM
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Cool Runnings
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Originally Posted by ChumpVette
You have to remove them.
How?
Old 05-23-2019, 04:49 PM
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ChumpVette
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Originally Posted by Cool Runnings
How?

By removing the shocks.

Jack the car up.
Remove rear tire.
Undo bottom nut for shock mount
Undo two 13mm bolts at top of shock
Old 05-23-2019, 04:50 PM
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ChumpVette
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Originally Posted by Cool Runnings
How do you reset the codes?
Ground A-C on th ALDL
Alternating 3 seconds between each ground and unground.
Cycle ign key to see if the codes have reset to 12's
Old 05-25-2019, 09:13 PM
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jscdesigns
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Default FX3 codes

Well I pulled all acuaters today and they all work. Checked all shocks and no broken gears and all turn 3/4 of a turn freely. Again tried to clear codes and re-run diagnostics. Every FX3 code came up again. Starting to lose patients.
Old 05-26-2019, 03:17 AM
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ChumpVette
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Clearing the codes can be a pain in the butt. If the timing sequence is off, it will fail. Best way is with a tech 1. The last option is that your ride control module has failed.
Old 05-26-2019, 11:15 AM
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Cool Runnings
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Originally Posted by ChumpVette
Clearing the codes can be a pain in the butt. If the timing sequence is off, it will fail. Best way is with a tech 1. The last option is that your ride control module has failed.
Is the ride control module behind the drivers seat?

Won't discounted the battery clear the codes?

Last edited by Cool Runnings; 05-26-2019 at 11:16 AM.
Old 05-26-2019, 04:28 PM
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Yes, it is in the bin with the ABS. Not sure if it resets after being unplugged. As it does a self check each time the key is cycled to run.

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