h2 trouble code

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h2 trouble code

Postby psychoh2 » Fri Feb 22, 2008 11:55 pm

hey guys i plugged my hypertech in the h2 and got a dtc today it came up a v1000 or a u1000 ? what is this ?
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Re: h2 trouble code

Postby Rich » Sun Feb 24, 2008 12:15 am

psychoh2 wrote:hey guys i plugged my hypertech in the h2 and got a dtc today it came up a v1000 or a u1000 ? what is this ?


I wish I had read this earlier. I had my reader with me today and it displays the code and the actual problem. If you have no check engine light it's probably nothing serious.
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Re: h2 trouble code

Postby Rich » Sun Feb 24, 2008 12:25 am

okay, it's a network code. Whatever the heck that is. :lol: I have a call into my buddy to ask what a 'class 2 communication malfunction' is.

oh, and it was a U - there is no V.

U0001 - Controller Area Network (CAN) Bus Communication (ECM)
U1000 - Class 2 Communication Malfunction
U1001~U1254 - Loss of XXX Communications
U1002~U1015 - Loss of serial communications for class 2 devices
U1016 - Loss of Class 2 Communication with VCM
U1016 - Loss of Communications with PCM
U1017~U1025 - Loss of serial communications for class 2 devices
U1026 - Loss of ATC Class 2 Communication
U1027~U1039 - Loss of Serial Communications for Class 2 Devices
U1040 - Loss of Class 2 Communications with ABS
U1041 - Loss of EBCM Communication
U1042 - Lost Communications with Brake/Traction Control System
U1043~U1055 - Loss of Serial Communications for Class 2 Devices
U1056 - Loss of Communications with RSS
U1057~U1060 - Loss of Serial Communications for Class 2 Devices
U1161 - Loss of PDM Serial Data
U1062 - Loss of Serial Communications for Class 2 Devices
U1163 - Loss of RRDM Serial Data
U1064 - Loss of Communications with DIM
U1065 - Loss of Communications with IPM
U1066 - Loss of Communications with RIM
U1067~U1069 - Loss of Serial Communications for Class 2 Devices
U1170 - Loss of Driver Door Switch Asm Serial Data
U1071~U1087 - Loss of Serial Communications for Class 2 Devices
U1088 - Loss of Communications with SDM
U1089~U1095 - Loss of Serial Communications for Class 2 Devices
U1096 - Loss of Communications with IPC
U1097~U1127 - Loss of serial communications for class 2 devices
U1128 - Loss of Communications with IRC
U1129 - Loss of Communications with AMP
U1130~U1143 - Loss of serial communications for class 2 devices
U1144 - Loss of Communications with PHN
U1145 - Loss Of NAV Communications
U1146 - Loss Of Onstar Communiction
U1147~U1151 - Loss of serial communications for class 2 devices
U1152 - Loss Of ACM Serial Data Communication
U1152 - Loss of Data HCM
U1153 - Loss of Communications with CCP
U1154~U1159 - Loss of serial communications for class 2 devices
U1160 - Loss of Communications with DDM
U1161 - Loss of PASS Door Module SBI
U1162 - Loss of Rear Driver Door Module SBI
U1163 - Loss of Rear PASS Door Module SBI
U1164 - Loss Of DIM Serial Data Communication
U1165 - Loss of serial communications for class 2 devices
U1166 - Loss of Communications with SCM
U1167 - Loss of serial communications for class 2 devices
U1168 - Loss Of TTM Communications
U1169 - Loss of Communications with MMM
U1170 - Loss of Driver Door Switch SBI
U1171~U1175 - Loss of serial communications for class 2 devices
U1176 - Loss Of RFA Communications
U1177~U1191 - Loss of serial communications for class 2 devices
U1192 - Loss of VTD Class 2 Serial Data Com
U1193 - Loss of VIM Class 2 Communication
U1194~U1254 - Loss of serial communications for class 2 devices
U1255 - Class 2 Communication Malfunction (Serial Data Line Malfunction)
U1300 - Class 2 Short to Ground
U1301 - Class 2 Short to Battery
U1304 - Loss Of UART Communications
U1305 - Class 2 Data Link Low or High
U1500 - Inter-Device Dedicated Bus Malfunction
U1713 - Loss of Front Door Module to Window Motor High Speed Comm.
U1715 - Loss of Front Door Module to Window Motor High Speed Comm.
U1714 - Loss of Front Door Module to Window Motor Normal Speed Comm.
U1716 - Loss of Front Door Module to Window Motor Normal Speed Comm.
U1800 - Controller Area Network (CAN) Bus Communication
U2000 - Invalid BFC Transmitted SPI Data
U2001 - Invalid IPC Transmitted SPI Data
U2002 - SPI Data-In Low
U2003 - SPI Data-In High
U2004 - SPI Data-Out Low
U2005 - SPI Data-Out High
U2006 - SPI Clock-Out Low
U2007 - SPI Clock-Out High
U2050 - SIR PPS/CPS Communications Link malfunction
U2100 - Controller Area Network (CAN) Bus OFF
U2100 - CAN-BUS Communication Malfunction
U2102 - More Controllers on Bus than Programmed
U2103 - Fewer Controllers On Bus Than Programmed
U2104 - CAN Bus Reset Counter Overrun
U2105 - CAN Bus Error ECM
U2105 - Lost Comm with Engine Control System
U2106 - Lost Comm with Trans Control System
U2107 - Lost Communications with Body Control System
U2108 - CAN Bus Error ABS
U2108 - Lost Comm with ABS Control System
U2150 - Navigation ECU Gateway Communication Error
U2151 - Navigation ECU Communication Malfunction
U2153 - VICS ECU Communication Error
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Re: h2 trouble code

Postby Rich » Sun Feb 24, 2008 12:35 am

This information applies to all GM vehicles Using Class 2 communication.
DTC U1000 or U1255 may set current or history, with or without other DTCs.
These DTCs set when the control module does not receive a message that it was expecting from another control module, and does not know which control module did not send the message.
If the DTC U1000 or U1255 is set in history with other DTCs set current or history, diagnose the other DTCs first.
If the DTC U1000 or U1255 is set current, this usually indicates a module that is currently not communicating or a configuration issue. For example, if the control module is configured for an option (i.e., OnStar, keyless entry, memory mirrors, etc.) that the vehicle does not have, it may expect to receive a message regarding this missing feature. This would usually occur due to the control module being recently replaced and incorrectly set up.
When the DTC U1000 or U1255 is current, the module that is not communicating may not even be listed on the Tech 2 on the Diagnostic Circuit Check /Class 2 Message Monitor list.
If the DTC U1000 or U1255 has set in history without other DTCs, replacing the control module that set the DTC is most likely NOT the solution. The module that has set the code is looking for an input from another module that is not communicating. Because the module did not receive an input that it is expecting to see, it sets a U1000 or U1255 which indicates there was a loss of communications. Look at the customer's concern (i.e., intermittent, erratic tachometer operation). This will probably be a better indication of the control module that is the source of the concern.
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Re: h2 trouble code

Postby psychoh2 » Sun Feb 24, 2008 1:20 am

hey thanks for the info rich that helped a bunch . by the info you just gave me , the u1000 code is actually or probably from disconnecting the onstar fuse why??? i dont know the hypertech manual tells you to do so before downloading there program to the ecu and maybe that set the code? the h2 runs fine so i guess all is good ... thanks again rich and i had a awsome time in hollister .
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Re: h2 trouble code

Postby Rich » Sun Feb 24, 2008 12:45 pm

psychoh2 wrote:by the info you just gave me , the u1000 code is actually or probably from disconnecting the onstar fuse why??? i dont know the hypertech manual tells you to do so before downloading there program to the ecu and maybe that set the code? the h2 runs fine so i guess all is good ... thanks again rich and i had a awsome time in hollister .


I'd say no doubt it's from pulling the onstar fuse. Clear the code and forget it.
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Re: h2 trouble code

Postby johnlu69 » Sat Dec 10, 2016 11:20 am

I Got the code for Lost Communication with TCM also traction failed, also check engine light is on. i try to move it into gear a few time it was hard but this morning i went to autozone and it worked fine but after i got home and put it in park and try to move it to drive nope its hard again. can some one please give me a hand. thanks. lu hernandez
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Re: h2 trouble code

Postby johnlu69 » Thu Dec 15, 2016 11:28 am

My Traction Failed came back on again. ugh fixin to recheck the battery and spark plugs. see how that goes. man cant catch a break espeically when i dont knw anything about mechanic work.lol but thanks to everyone for the help. hooah
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