thehunterooo
Well-Known Member
Ah I see, I seen it the Forscan site https://forscan.org/forum/viewtopic.php?f=4&t=6142 but I didn't realize the SX wouldn't work because of no MS-CAN support. I shall pick up the MX. Thank you!
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Hi everyone. I have a 2017 Mustang GT Premium with the Shaker Pro sound system and desperately need to mod the car to make head unit into low-level line output to go into aftermarket amps and dump my aftermarket DSP. A friend and I have tried your suggestion and it does not work. We are using a new OBDLink MX and latest version of forscan. We successfully changed other parameters (such as signal light error code) so know our equipment is correct. We have tried changing 727-01-01 to xxXx to every possible hex value from xx0x to xxFx which includes xx5x. We Tried xx5A, xx59, and dozens of other combinations. We have also changed 727-01-02 and 7D0-01-01 as instructed. The head unit definately reboots after every write. Some of the combinations cause the speaker output to go to 0 regardless of volume - we have several pro-grade meters connected to the speaker outputs of the factory amp module (where the gas pedal is) to detect any output. Some values cause the volume buttons to stop working. Some values keep output hot (peaks about 9 volts). None of these combinations result in the deck putting out a low-level (0 to 2 volts) output. Any help would be greatly appreciated.This worked on my 2017 F150 and 2017 Mustang
Variable Line Level Preamp Outputs From ACM (for adding aftermarket amp without sound clipping)
ACM 727-01-01 xx5A xxxx xxxx
ACM 727-01-02 00xx
APIM 7D0-01-01 2xxx xxxx xxxx <--- this change required only if you have Sony DSP
I believe what you're missing here is that you need to bypass that extra amp/DSP. You have to get your 4V out from the ACM, which is the part in the center stack that has the CD player.
Hi everyone. I have a 2017 Mustang GT Premium with the Shaker Pro sound system and desperately need to mod the car to make head unit into low-level line output to go into aftermarket amps and dump my aftermarket DSP. A friend and I have tried your suggestion and it does not work. We are using a new OBDLink MX and latest version of forscan. We successfully changed other parameters (such as signal light error code) so know our equipment is correct. We have tried changing 727-01-01 to xxXx to every possible hex value from xx0x to xxFx which includes xx5x. We Tried xx5A, xx59, and dozens of other combinations. We have also changed 727-01-02 and 7D0-01-01 as instructed. The head unit definately reboots after every write. Some of the combinations cause the speaker output to go to 0 regardless of volume - we have several pro-grade meters connected to the speaker outputs of the factory amp module (where the gas pedal is) to detect any output. Some values cause the volume buttons to stop working. Some values keep output hot (peaks about 9 volts). None of these combinations result in the deck putting out a low-level (0 to 2 volts) output. Any help would be greatly appreciated.
Kirk
I use the OBDLink MX Bluetooth (not the wifi version) and have had no issues.What is everybody using to do the programming on there cars?? Iām send Ming my obdlink mx WiFi back and getting a different one since that one was junk and wouldnāt connect to my lap top. My problem is my laptop is not Bluetooth so I was going to get a corded adapter or maybe buy a new table but not sure what works and what doesnt
I had that one first but my laptop is not Bluetooth so I sent it back and got the WiFi and itās will not connect to my laptop at all works fine with my phone but canāt make forscan changes with the phoneI use the OBDLink MX Bluetooth (not the wifi version) and have had no issues.
BT USB adapters are cheap, man.I had that one first but my laptop is not Bluetooth so I sent it back and got the WiFi and itās will not connect to my laptop at all works fine with my phone but canāt make forscan changes with the phone
Thatās the one I had to start with and I sent it back guess Iāll look into a Bluetooth adapter for my computer but was really leaning more towards a corded option just so it couldnāt lose a connection during a uploadBT USB adapters are cheap, man.
I've heard of other people having issues with the WiFi. The only good reason I know of to get one of those is iOS compatibility. The ODBLink MX Bluetooth is the only surefire bet.
When you do a search on this Forum, the FORScan thread should come up...look at the spreadsheet in post #1. This should help.Is there a proven list of changes that can be made? Iāve looked around and havenāt found much. Iām wanting to make the rear speaker outputs in a low level signal and a few other things so far only done the fog lights on with blinkers
It doesn't work because you need to bypass the factory DSP/Amp with an RCA out, speaker level in harness.. You do know that the as built you're modifying is ACM as built, correct? NOT DSP as built. The ACM in the Premium cars is ALREADY line level into the DSP/Amp module. What you did was to effectively turn off the signal from the ACM to the DSP. Of course you had no voltage. Bypass the DSP/Amp module and make no changes for level out and you will be fine.
Hi everyone. I have a 2017 Mustang GT Premium with the Shaker Pro sound system and desperately need to mod the car to make head unit into low-level line output to go into aftermarket amps and dump my aftermarket DSP. A friend and I have tried your suggestion and it does not work. We are using a new OBDLink MX and latest version of forscan. We successfully changed other parameters (such as signal light error code) so know our equipment is correct. We have tried changing 727-01-01 to xxXx to every possible hex value from xx0x to xxFx which includes xx5x. We Tried xx5A, xx59, and dozens of other combinations. We have also changed 727-01-02 and 7D0-01-01 as instructed. The head unit definately reboots after every write. Some of the combinations cause the speaker output to go to 0 regardless of volume - we have several pro-grade meters connected to the speaker outputs of the factory amp module (where the gas pedal is) to detect any output. Some values cause the volume buttons to stop working. Some values keep output hot (peaks about 9 volts). None of these combinations result in the deck putting out a low-level (0 to 2 volts) output. Any help would be greatly appreciated.
Kirk