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You can if you want but I really don't think it will help...when I grounded pin 2 I could not get the car in ACCY or Run mode...Radio went dead as well as Power Windows and Door Locks...the Radio completely shut off...the IPC went dead also...I don't know if this issue is intermittent or not...that Autel is one of the ones I recommend on the Forum that is not to expensive. I have the MS906 and with yours you should be able to scan all the modules...if you can select any module and look at "Live Data" that means the module is communicating with the scan tool...like I said try removing those fuses and depower that module and see what happens...if you want to let a shop handle this here is one in your town.
I will work on your suggestions this saturday. Thank you
Ok, the IPC fuse is at the BCM and labeled CLSTR/HUD and the Radio fuse is fuse 31 AMP in the underhood fuse block and the other is labeled RDO/S-BAND /VICS and that one is located at the BCM…one of those 2 modules may be responsible for the no start.
I removed the cluster/hud, the #31, and the RDO/S-BAND/VICS fuses and nothing changed. I did notice before i removed all three to try to start it that the rdo fuse was blown so i replaced it and when i went to remove all three the rdo fuse was blown again. Also, i tried three times to connect to the IPC with my autel but it said it couldn't connect.
Last edited by Gman's 14; Sep 23, 2024 at 02:44 PM.
[QUOTE=Gman's 14;1608195470]I removed the cluster/hud, the #31, and the RDO/S-BAND/VICS fuses and nothing changed. I did notice before i removed all three to try to start it that the rdo fuse was blown so i replaced it and when i went to remove all three the rdo fuse was blown again. Also, i tried three times to connect to the IPC with my autel but it said it couldn't connect.[/QUOTE
Interesting !!…so we have a blown RDO fuse and the IPC won’t communicate ??…can you communicate with the other modules on the serial data bus (HVAC, RCDLR, Driver Door Module, SDM etc…if only the IPC you’ll have to check its powers and grounds first…if GOOD you have a bad module…as far as the radio you have to remove the radio connector and then install a new fuse and see if it blows…if it does blow again you have a direct short to ground between the fuse box and the connector…if it doesn’t blow a bad radio most likely…with both the radio and IPC connectors off the data bus see if the car now starts.
IPC power and ground are on the X2 (16 pin connector)…battery power is on pin 3 and ground on pin 1…to check the ground if you have a 12 volt test light connect to to pin 3 if you have power there and probe pin 1…if ground is good the test light will light.
I removed the cluster/hud, the #31, and the RDO/S-BAND/VICS fuses and nothing changed. I did notice before i removed all three to try to start it that the rdo fuse was blown so i replaced it and when i went to remove all three the rdo fuse was blown again. Also, i tried three times to connect to the IPC with my autel but it said it couldn't connect.[/QUOTE
Interesting !!…so we have a blown RDO fuse and the IPC won’t communicate ??…can you communicate with the other modules on the serial data bus (HVAC, RCDLR, Driver Door Module, SDM etc…if only the IPC you’ll have to check its powers and grounds first…if GOOD you have a bad module…as far as the radio you have to remove the radio connector and then install a new fuse and see if it blows…if it does blow again you have a direct short to ground between the fuse box and the connector…if it doesn’t blow a bad radio most likely…with both the radio and IPC connectors off the data bus see if the car now starts.
I can communicate with the other modules you listed. I'm getting .2 to.3 from the DLC on pin 2. It did blow the RDO fuse when i replaced it and reconnected the battery.
Last edited by Gman's 14; Sep 23, 2024 at 06:34 PM.
I can communicate with the other modules you listed. I'm getting .2 to.3 from the DLC on pin 2
And you can communicate with modules on the high speed bus…BCM, VCIM, ESC, EBCM, ECM ??…if you can view live data on those modules then you are communicating....did you try starting the car with the FOB in the FOB slot inside the glove box ??…and make sure the battery is fully charged while you are diagnosing…if we don’t have any bus issues whether serial data or high speed we may have to go down another path.
And you can communicate with modules on the high speed bus…BCM, VCIM, ESC, EBCM, ECM ??…if you can view live data on those modules then you are communicating....did you try starting the car with the FOB in the FOB slot inside the glove box ??[/QUOTE Unable to communicate with ESC,EBCM. Others you listed i can. I did try the fob slot but no luck.
Last edited by Gman's 14; Sep 23, 2024 at 07:02 PM.
And you can communicate with modules on the high speed bus…BCM, VCIM, ESC, EBCM, ECM ??…if you can view live data on those modules then you are communicating....did you try starting the car with the FOB in the FOB slot inside the glove box ??[/QUOTE Unable to communicate with ESC,EBCM. Others you listed i can.
Can you just list all the modules you can and can’t communicate with ??
This is the information bus…don’t know if you have A/T or M/T ??…schematic with control solenoid valve assembly is A/T…purple wire going to both splice packs are the modules on the serial data bus…pin 2.
Can you just list all the modules you can and can’t communicate with ??
The following are a yes, ECM, TCM, BCM, DRIVER DOOR MODULE, PASSENGER DOOR MODULE, RCDLR, HVAC, VCIM, HUD These are all a no, ESC, EBCM, IPC, DIGITAL RADIO RECEIVER, STEERING COLUMN LOCK MODULE,
This is the information bus…don’t know if you have A/T or M/T ??…schematic with control solenoid valve assembly is A/T…purple wire going to both splice packs are the modules on the serial data bus…pin 2.
Do you have magnetic ride control ??…if not you won’t be able to communicate with the ESC…the only module on the high speed bus I see you can’t communicate with is the EBCM…as mentioned on an earlier post was this car in a flood ??…you may have to check powers and grounds on the EBCM…maybe have the connectors to the EBCM, Radio, and IPC and see what happens when you try to start the car…I’ve heard of cars getting hit by lightning that smoke a bunch of modules…the strange thing is you communicate with the RCDLR but you don’t hear it click a few times when trying to start the car…I know that if you can hear the series of clicks and it still doesn’t start it could just be the back up antenna inside the glove box area may be bad and you also can’t put the car in ACCY mode or IGNITION ON and the car won’t start…don’t know how much more help I can give you…I’d be putting my lab scope on your car so you might be better off taking it to the shop I mentioned.
[QUOTE=C5 Diag;1608196549]Do you have magnetic ride control ??…if not you won’t be able to communicate with the ESC…the only module on the high speed bus I see you can’t communicate with is the EBCM…as mentioned on an earlier post was this car in a flood ??…you may have to check powers and grounds on the EBCM…maybe have the connectors to the EBCM, Radio, and IPC and see what happens when you try to start the car…I’ve heard of cars getting hit by lightning that smoke a bunch of modules…the strange thing is you communicate with the RCDLR but you don’t hear it click a few times when trying to start the car…I know that if you can hear the series of clicks and it still doesn’t start it could just be the back up antenna inside the glove box area may be bad and you also can’t put the car in ACCY mode or IGNITION ON and the car won’t start…don’t know how much more help I can give you…I’d be putting my lab scope on your car so you might be better off taking it to the shop I mentioned.[/QUOT It does have ride control. The rcdlr does not click . The car is not a flood car. The rdo fuse keeps blowing. I appreciate your help.
I’ll look at wiring and see if the EBCM and ESC modules are on the same power or ground circuit…I’d definitely get that short to ground on the radio looked at…the IPC powers and grounds too…I think you have multiple issues…don’t know if you want to get into it this deep.
Looks like the EBCM and the ESC module need power from the run/crank relay and since the RCDLR powers that circuit that is most likely why those 2 modules have “no comms”….so your high speed bus is probably ok…I think your RCDLR is bad since you don’t hear anything when you try to start the car…with your scan tool you can try going into the RCDLR and there should be an Ignition Mode Switch” parameter…when the start button is not pressed it should read “idle”…if you press the start button once it should read ACC/OFF…if you hold the start button down it should read “CRANK”…if you want to remove the glovebox and the trim panel above it you can get to the backup antenna…if you remove the connector and put the positive lead of your DVOM on the orange wire and the black lead on the orange/black and select AC VOLTS when you press the start button you will see an AC voltage anywhere between .2 to maybe .8 volts.
Looks like the EBCM and the ESC module need power from the run/crank relay and since the RCDLR powers that circuit that is most likely why those 2 modules have “no comms”….so your high speed bus is probably ok…I think your RCDLR is bad since you don’t hear anything when you try to start the car…with your scan tool you can try going into the RCDLR and there should be an Ignition Mode Switch” parameter…when the start button is not pressed it should read “idle”…if you press the start button once it should read ACC/OFF…if you hold the start button down it should read “CRANK”…if you want to remove the glovebox and the trim panel above it you can get to the backup antenna…if you remove the connector and put the positive lead of your DVOM on the orange wire and the black lead on the orange/black and select AC VOLTS when you press the start button you will see an AC voltage anywhere between .2 to maybe .8 volts.
When I hold the bottom of the start button the scanner says ACC/OFF. When i put it in accessory mode it says IDLE. When I press the top of the start button it says CRANK. I checked the voltage at the backup antenna plug. When i first press the start button the voltage jumps around a little but then settles back at zero everytime.
Last edited by Gman's 14; Sep 24, 2024 at 04:09 PM.
OK, the ignition switch seems to work fine and if you see an AC voltage signal from the RCDLR that seems to be OK too but you still hear nothing from the RCLDR when you press the bottom of the switch or press the start button ??…you can verify that the run/crank relay is being energized by testing the ECM fuse in BCM fuse block with a 12 volt test light connected to ground and see if it lights when you push the start button…you may need 2 people for this…its a 15 amp fuse I believe…maybe another member will have some ideas ??
OK, the ignition switch seems to work fine and if you see an AC voltage signal from the RCDLR that seems to be OK too but you still hear nothing from the RCLDR when you press the bottom of the switch or press the start button ??…you can verify that the run/crank relay is being energized by testing the ECM fuse in BCM fuse block with a 12 volt test light connected to ground and see if it lights when you push the start button…you may need 2 people for this…its a 15 amp fuse I believe…maybe another member will have some ideas ??
I’d say it’s bad…maybe others can chime in and may agree or disagree…will the car start if you put the FOB into the backup antenna slot in the glovebox ??…you’re not getting any “no FOB detected” messages so it probably still won’t work.
