Carbon Fibr

So I searched and searched. I Couldnt find anything with type of situation.

I have a light on the dash to my power steering is showing off.

And it is

I cleaned all the connections on the harness, cleaned grounds, checked fuse wire.
Checked power coming out of the 60amp fuse.

I dont know what to do next. Maybe the motor is fried.

I drove it into the garage, changed the battery to a red top, new terminals.
Changed sparked plugs wire and coils. I didn't touch anything to do with power steering.
Any suggestions?

nycgps

iTrader: (1)

put my bet on the PS wiring harness.

just test it with a ohm meter, plug into each end on the same wire, wiggle the wire and if the ohm change, wire is bad.

S1 ps wiring harness is one major rip off, like a hundred something bucks. S2 is just like 20-30 bux cuz t's 2 feet shorter.

Grace_Excel

iTrader: (5)

It's one of the terminals; you really just need to clean and tighten the connections. I had the same problem three-and-a-half years ago and fixed it with zip ties, then when I replaced the engine it came back. I completely removed the harness, cleaned it with dielectric grease to prevent corrosion and tightened the connections; extended the hose of the coolant reservior, as well. You only have three options:

- Clean and tighten the terminals.
- Hardwire (solder) the connections.
- Replace the harness with a brand new one.

Carbon Fibr

hmmm, Terminals as in battery terminals?

i checked after the 60amp EPS fuse im getting full voltage off the battery.

Grace_Excel

iTrader: (5)

Oh, no buddy. You have a long ways to go. Good start though! Check the links provided below:

Power Steering failure - I know it's been covered.

DIY: Power Steering connector cleaning with pics.

Carbon Fibr

yeah i seen these.
did everything they said accept change the harness.

I guess thats next.
Whats it take to blow up the power steering motor.

Or what about all the power steering modules in the left side black conpartment box.
im starting to get scared.. http://foxed.ca/rx7manual/2003mazdar...301038W06.html

Grace_Excel

iTrader: (5)

Try what ncygps have suggested, then check the For Sale threads in the forum for car parts-out of the harness and/or module before going to the dealer if you feel that either of the two have failed.

Carbon Fibr

My situation is weird, because i drove it into my garage with working PS.
Than after doing a tune-up, New red top battery, new air filter, plugs coils and wires. Some suspension work, race pipe + catback exhaust and than a 3stage buff, polish and wax.

Obviously the only thing part of the PS system i touched or even came close to contacting is the battery.
The air box has the cover that covers the other wires. I took them apart and their super dry and clean inside.
Cleaned & put dielectirc grease anyways.

& still not working.

sooo confused.

Carbon Fibr

Does the power steering light stay on with the key forward. Not running. If it's healthy?

Grace_Excel

iTrader: (5)

It does light up if you only turn the key to the ON position without starting the car, either working module or not. I still have all the original parts and harnesses from the factory, so, additional steps I did while I had the harness out: I bent the copper-connector inside the female end of the harness to ensure contact on the male end, specially the one on the rack-n-pinion and cleaned the ground there, and the one near the battery with the wire brush. I also tried wiggling the clamp on the negative terminal of the battery which has the EPS fuse and it was a little loose which also caused my EPS to turn off when I drove over a bump or pot hole, then works after restarting the car until I hit another bump.

That was after I had my engine replaced. I've only read of one member replacing the module and the majority were harness related, so I cannot suggest on getting a different module because I still believe it's just the harness. It may not be in the terminals and you have a 2005 that is daily driven like mine, so, it could be an internal wire that's broken if you have tried cleaning all the terminals and still hasn't worked. Check this seller if he still have his Electric Power Steering Harness for sale?

Carbon Fibr

so i spent the day with a friend whos a mechanic figuring it all out.
i got information on the system from all types of sources.
& printed them off. Fallowed most steps that we could, fallowed the wiring diagram
Checked continuity through the PS module & the harness that runs from the module to the motor & torque sensor.
double checked everything & we cannot figure it out.
Theres some steps that the dealer takes to check DTC codes which will not show up with your average obd2 scanner which i have.
certain PID data & DTC codes that can be viewd & Error codes from the DTC.
I resset the module back to the neutral position because i removed it.

So my next step is im going to replace the harness its self. part # F151-67-SH0D
solely because its a new upgraded part & everyone on the internet seems to have the issue there. ( & just a solid note that its not the harness) who knows could be losing some voltage somewhere. If that does not work ill be taking it to the dealer to clear the DTC code which i cannot see. & Seeing what they think.

Im just stumped at all this because really I didnt touch anything to do with the system but the battery.
Of course its my luck that just a little cleaning & dieletic grease didnt work, & the fact that i get a problem that no one else has seen yet. (or cared to share)

very help full link... http://www.mazdarx8.org/wp-content/u...8-Steering.pdf

Carbon Fibr

found a code.

U1900 CAN communication error

http://foxed.ca/rx7manual/2003mazdar...html#wp1025486

HiFlite999

iTrader: (2)

Did you reset the power steering after changing the battery as shown in the owner's manual?

Carbon Fibr

no, please share how to do this.
I recently purchased the car without the owners manual. & all the links i Find are expired as to owners manual.

Mazurfer

I believe he is talking about this one?

Turn the key to on, but do not start.
Turn the wheel all the way to the right, then all the way to the left.
Turn key to off.
Wait 10 seconds, then start as normal.
This is actually the DCS/TCS reset.


PM me your E-mail address and I'll send you a pdf of the owners manual.

Carbon Fibr

yeah i know about that one. that one works everytime

actually found a pdf link but thanks.

Grace_Excel

iTrader: (5)

Yeah, that only calibrates and aligns the sensor for your steering but not the fix of the problem with his EPS.

Since it's the terminal on the battery is the only thing you touched, have you had time to check the wires and that one fuse there?

Carbon Fibr

yeah i checked that.
off the battery while not running im getting 12.5 volts. after the fuse holder theres a clip at the bottom; pulled that out, checked with the volt meter at the bottom. Recieving 12.5 volts.
at the control moduel under the ecu the constant power coming in im recieving 12.5 volts.

Maybe tonight im going to hardwire the connections @ the top of the harness. & de-pin the connectors to the motor & the torque sensor. Solder them, & reconnect.
ill see if that works.
ifnot i have a problem with the control module; this code i found makes me curious about this "CAM" system using 1 buss.

Some people also found that after they replaced the battery. It took a while of driving it for the system to re-learn its self.
This EPS crap is so sensitive & too complicated for the average joe.

Carbon Fibr

Power steering problem has been resolved!

Im shocked to see no one has posted this solution on the forums. Maybe its a trade secret.
The stress i went through, checking wires, harness and never having any success.
All the car needed was a total reset.

Disconnecting the battery for a few hours. Didn't work.
NVRAM reset, 20 break pedal stomps (see oil gauge move). Didn't work.
Turning steering wheel to the right than left. Didn't work.

The solution was to:
-disconnect negative terminal.
-Turn key forward
-within 5 seconds stomp the break pedal 10 times
-Turn key back.
-reconnect battery

you wont get an indication anything happened because the battery is off.

When I started the car the light was gone & steering worked. It also ran like a bag of ****. So you have to take it down the street to have the computer re-learn its fuel trims.

Mazurfer

^....................strange indeed, never heard of that one, but certainly glad it appeared to have worked.
Where did you come up with that idea?
This should have been the same as disconnecting the battery for a few hours in my opinion.