NotLawReview

(cross posted to C5 general)

I picked up a new-to-me z16 z06 to replace my old '04 z06 that was flooded down here over memorial day, and neither of the fob remotes work.

I've searched this forum to pieces and while I've found some people that posted about a similar issue, they either didn't post a follow-up about a resolution or no answer was provided.

So.... when going through:
1. Turn ignition on.
2. Turn radio off.
3. Press DIC RESET button.
4. Press OPTIONS on DIC until display isd blank.
5. Press and Hold RESET button for 3 seconds.
6. Press OPTIONS button until FOB TRAINING is displayed.
7. Press RESET button to begin programming sequence.
8. Simultaneously \press and hold LOCK and UNLOCK buttons on FIRST remote for 13 seconds. Message will appear that 1st FOB programmed.
*(*(at this point on the SECOND FOB press and hold LOCK and UNLOCK simultaneously. Message will appear on DIC that 2nd FOB programmed.
9. turn ignition off and remove key.
10. test remotes.

I get to Step 7, but the menu will not progress any further. I can push RESET until I'm blue in the face, hold it, tap it, whatever, and the Step 8 message does not ever display.

I have also tried the re-sync method of holding both buttons down outside of the car, as well as disconnecting the battery for a spell and retrying, and neither worked.

Any ideas? Maybe a grounding issue?

Thanks in advance!

Edit: Car is an '04 Z06 so TPMS does not apply

Bill Curlee

Hmmmm,,, Seeing how your Z doesn't have Tire Pressure Sensors, you cant see if the RFA module is functioning by seeing the pressures.

In that case,,, Check the FUSES for the RFA module and make sure that they are installed and not blown.

You can also check the DTCs and see if you have a RFA NO COMMS message. That would be my next recommendation...

Pssst,,, I have Tire Pressure Sensors on my 02 ZO6.

If you desire to install and use them as I did, purchase and install the sensors in the rims, have someone with a GM TECH 2 turn ON the Tire Pressure Sensor RPO Code in the BCM.

That's ALL there is to it!

Bill Curlee

NotLawReview

Alright, didn't have time to get into the fuse box at lunch, but did pull all of the code history:

TCS - U1000H

BCM - B0502H, B0507H, B2482H, B2587H, B2592H

HVAC - B0361H, B0367H, B0441H

LDCM - B2282H, B2286H, B2284H, U1096H

RDCM - B2283H, B2287H, B2285H, U1096H

B0 - RFA - NO COMM

I haven't looked up the meanings of all the codes, but obviously the RFA - NO COMM is the issue, correct?

Thanks!

Bill Curlee

LOL!! Now,,, How did I guess that was going to be displayed??

CLEAR all the DTCs and see if they will go away and stay gone. If any come back, we can go from there!!

Check that FUSE.

BC

Mattias L

Hi Bill and all other
Ive got a similar issue
But i only come to step 6
Learning tires is the only thing show up ,,when i push option nothing happens

And a different thing ,,I've got -2000 cab automatic it is the f45 shocks on it now
My plan is ti change to bilstein shocks
If i understand it right
Switch shocks
Pull out the cables from the switch in the car
Pull out the cable from a box which is located somewhere back in the car ( were ??)
Last find a Tech2 and deactivate f45
Is there something else to do this right
And my car have tire sensor system ,,but my wheels doesn't have sensors (Ruff racing wheels)
And the stereo is replaced with a Pioneer
Thanks from Sweden
/Mattias

NotLawReview

Alright, after clearing the codes on my lunch break, no codes returned on the ride home. The NO COMM for the RFA is still there, however.

I checked Fuse 27 and it was fine, still NO COMM after removal and replacement.

Where is the RFA located? If this is caused by an open derial data bus connection to the RFA, how would I close it?

Thanks!

Bill Curlee

The RFA is behind the rear speaker on the drivers side. Its tucked in the area above the wheel well.. Remove the plastic panel and start by using a meter to check for power and ground at the module connector. Then you need to check for continuity from the module plug to the BCM on the serial buss.

NotLawReview

Alright, over the last week I have been able to test the fuses again, check the grounds (but I was only able to access the actual screw point, and didn't see the connector as there appears to be an aftermarket heatshield as well as some extra fuses for the 2 amps that are in the car. I did all of this while installing a Big 3 kit as the car's headlights definitely dim whenever the subwoofer hits.

I got into the back panel and checked the RFA, and the connection and module themselves both look new and are in good shape, and I was using a multimeter that I wasn't familiar with so there's a chance I was putting it on the wrong setting. That being said, it was returning a result that was bouncing absolutely everywhere, from high to low, all of it very very quickly.

While I was in there I tried to trace the wiring backwards as I'm thinking that this could be due to the audio install (which has taken me quite a while to rewire, but thankfully that's done) and I didn't see anything wrong with the wires down to where they disappeared into the carpet. The car also has illuminated door sills (it was previously a show car, apparently) so I'm also curious as to if that could be contributing to the issue.

Any ideas? Should I bail and just put in an aftermarket alarm that will accomplish the same result? (I just want to be able to open the doors by remote, so I can get the door for a female passenger, etc. lol)

NotLawReview

I have checked the star connectors and they are in good shape, so I'll familiarize myself with the multimeter and get back in there and try again. Thanks so much for the help!

givemeurc6

Having the same issues. I guess i'll check the fuses tomorrow. I need to get my code reader back to run the codes.

Bill Curlee

Replyed to at 3:02 AM....

Glad Im not the only one that stays awake at all hours of the night!!! LMAO

Good recommendations on reading your OWN DTCs!

You dont need any STINKING CODE READERS!

BC

givemeurc6

So I'm getting the rfa- no comm message as well. I'll change the fuse 27. Hopefully that fixes it.

givemeurc6

So, the fuse looked okay. I cleared the codes. Still no dice. RFA- No Comm still. Looks like I'm going to have to get into the RFA. I was hoping it would be as easy as just a Fuse, but it never is. Thanks for the code reader and clearing tip.

NotLawReview

Let me know what you find out... I have been slow to get to this project as it has been 102 in Houston for the past 15 days and is hitting 104 for the next week... Working in the garage (even at 1am) takes about a gallon of water out of my system in about 20 minutes and then I get cranky about it and quit haha.

I did clean up the grounds by the battery last night and try again but it did not help. (just the screw where the battery and fuse box ground)