Net 1y16f

·0 U0001 - Controller Area Network (CAN) Bus Communication (ECM) ·1 U1000 - Class 2 Communication Malfunction ·2 U1001~U1254 - Loss of XXX Communications ·3 U1002~U1015 - Loss of serial communications for class 2 devices ·4 U1016 - Loss of Class 2 Communication with VCM ·5 U1016 - Loss of Communications with PCM ·6 U1017~U1025 - Loss of serial communications for class 2 devices ·7 U1026 - Loss of ATC Class 2 Communication ·8 U1027~U1039 - Loss of Serial Communications for Class 2 Devices ·9 U1040 - Loss of Class 2 Communications with ABS ·10 U1041 - Loss of EBCM Communication ·11 U1042 - Lost Communications with Brake/Traction Control System ·12 U1043~U1055 - Loss of Serial Communications for Class 2 Devices ·13 U1056 - Loss of Communications with RSS ·14 U1057~U1060 - Loss of Serial Communications for Class 2 Devices ·15 U1161 - Loss of PDM Serial Data ·16 U1062 - Loss of Serial Communications for Class 2 Devices ·17 U1163 - Loss of RRDM Serial Data ·18 U1064 - Loss of Communications with DIM ·19 U1065 - Loss of Communications with IPM ·20 U1066 - Loss of Communications with RIM ·21 U1067~U1069 - Loss of Serial Communications for Class 2 Devices ·22 U1170 - Loss of Driver Door Switch Asm Serial Data ·23 U1071~U1087 - Loss of Serial Communications for Class 2 Devices ·24 U1088 - Loss of Communications with SDM ·25 U1089~U1095 - Loss of Serial Communications for Class 2 Devices ·26 U1096 - Loss of Communications with IPC ·27 U1097~U1127 - Loss of serial communications for class 2 devices ·28 U1128 - Loss of Communications with IRC ·29 U1129 - Loss of Communications with AMP ·30 U1130~U1143 - Loss of serial communications for class 2 devices ·31 U1144 - Loss of Communications with PHN ·32 U1145 - Loss Of NAV Communications ·33 U1146 - Loss Of Onstar Communiction

·34 U1147~U1151 - Loss of serial communications for class 2 devices ·35 U1152 - Loss Of ACM Serial Data Communication ·36 U1152 - Loss of Data HCM ·37 U1153 - Loss of Communications with C ·38 U1154~U1159 - Loss of serial communications for class 2 devices ·39 U1160 - Loss of Communications with DDM ·40 U1161 - Loss of Door Module SBI ·41 U1162 - Loss of Rear Driver Door Module SBI ·42 U1163 - Loss of Rear Door Module SBI ·43 U1164 - Loss Of DIM Serial Data Communication ·44 U1165 - Loss of serial communications for class 2 devices ·45 U1166 - Loss of Communications with SCM ·46 U1167 - Loss of serial communications for class 2 devices ·47 U1168 - Loss Of TTM Communications ·48 U1169 - Loss of Communications with MMM ·49 U1170 - Loss of Driver Door Switch SBI ·50 U1171~U1175 - Loss of serial communications for class 2 devices ·51 U1176 - Loss Of RFA Communications ·52 U1177~U1191 - Loss of serial communications for class 2 devices ·53 U1192 - Loss of VTD Class 2 Serial Data Com ·54 U1193 - Loss of VIM Class 2 Communication ·55 U1194~U1254 - Loss of serial communications for class 2 devices ·56 U1255 - Class 2 Communication Malfunction (Serial Data Line Malfunction) ·57 U1300 - Class 2 Short to Ground ·58 U1301 - Class 2 Short to Battery ·59 U1304 - Loss Of UART Communications ·60 U1305 - Class 2 Data Link Low or High ·61 U1500 - Inter-Device Dedicated Bus Malfunction ·62 U1713 - Loss of Front Door Module to Window Motor High Speed Comm. ·63 U1715 - Loss of Front Door Module to Window Motor High Speed Comm. ·64 U1714 - Loss of Front Door Module to Window Motor Normal Speed Comm. ·65 U1716 - Loss of Front Door Module to Window Motor Normal Speed Comm. ·66 U1800 - Controller Area Network (CAN) Bus Communication ·67 U2000 - Invalid BFC Transmitted SPI Data

·68 U2001 - Invalid IPC Transmitted SPI Data ·69 U2002 - SPI Data-In Low ·70 U2003 - SPI Data-In High ·71 U2004 - SPI Data-Out Low ·72 U2005 - SPI Data-Out High ·73 U2006 - SPI Clock-Out Low ·74 U2007 - SPI Clock-Out High ·75 U2050 - SIR PPS/S Communications Link malfunction ·76 U2100 - Controller Area Network (CAN) Bus OFF ·77 U2100 - CAN-BUS Communication Malfunction ·78 U2102 - More Controllers on Bus than Programmed ·79 U2103 - Fewer Controllers On Bus Than Programmed ·80 U2104 - CAN Bus Reset Counter Overrun ·81 U2105 - CAN Bus Error ECM ·82 U2105 - Lost Comm with Engine Control System ·83 U2106 - Lost Comm with Trans Control System ·84 U2107 - Lost Communications with Body Control System ·85 U2108 - CAN Bus Error ABS ·86 U2108 - Lost Comm with ABS Control System ·87 U2150 - Navigation ECU Gateway Communication Error ·88 U2151 - Navigation ECU Communication Malfunction ·89 U2153 - VICS ECU Communication Error

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Class 2 Diagnostic Tips

This information applies to all GM vehicles Using Class 2 communication. DTC U1000 or U1255 may set current or history, with or without other

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