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Data Communication System: Other Chevrolet Spark M300

Communication Devices 2 illustrations ~5482 words

Control Module U Code List

This list includes all Data Communications related U-code DTCs in alphanumeric order with descriptors for all devices. Not all DTCs listed will be applicable to all vehicles.

For symptom byte information, refer to Symptom Byte List .

DTCDTC Descriptor
U0001High Speed CAN Bus Malfunction
U0002High Speed CAN Bus
U0020Low Speed CAN Bus
U0028MOST Bus
U0029MOST Bus Performance
U0073Control Module Communication Bus A Off
U0074Control Module Communication Bus B Off
U0075Control Module Communication Object Detection CAN Bus Off
U0077Control Module Communication Chassis Expansion CAN Bus Off
U0078Control Module Communication Low Speed CAN Bus Off
U007AControl Module Communication High Voltage Energy Management CAN Bus Off
U0100Lost Communication With Engine Control Module
U0101Lost Communication With Transmission Control Module
U0102Lost Communication with Transfer Case Control Module
U0103Lost Communication with Shift Lever Module
U0104Lost Communication With Cruise Control Module
U0105Lost Communication with Fuel Injector Control Module
U0109Lost Communication with Fuel Pump Control Module
U010ELost Communication with Reductant Sensor Module
U010FLost Communication with Air Conditioning Control Module
U0111Lost Communication with Battery Energy Control Module
U0112Lost Communication with Battery Energy Control Module
U0115Lost Communication with Engine Control Module B
U0117Lost Communication With Power Take-Off Control Module
U0121Lost Communication With Electronic Brake Control Module
U0122Lost Communication With Vehicle Stability Control Module
U0125Lost Communication With Multi-axis Acceleration Sensor Module
U0126Lost Communication With Steering Wheel Angle Sensor Module
U0128Lost Communication With Park Brake Control Module
U0129Lost Communication with Brake System Control Module
U012ALost Communication With Chassis Control Module
U0130Lost Communication With Electric Power Steering Control Module
U0131Lost Communication With Power Steering Control Module
U0132Lost Communication With Suspension Control Module
U0133Lost Communication With Air Suspension Control Module
U0136Lost Communication With Differential Control Module - Rear
U0137Lost Communication with Trailer Brake Control Module
U0139Lost Communication With Suspension Control Module
U0140Lost Communication With Body Control Module
U0146Lost Communication with Infotainment Gateway Module
U0151Lost Communication With Inflatable Restraint Sensing and Diagnostic Module
U0155Lost Communication With Instrument Cluster
U0158Lost Communication With Head-Up Display
U0159Lost Communication With Parking Assist Control Module
U0160Lost Communication With Chime Alarm Control Module
U0164Lost Communication with HVAC Control Module
U0166Lost Communication with Auxiliary Heater Control Module
U0167Lost Communication with Immobilizer Control Module
U0168Lost Communication With Keyless Entry Control Module
U016BLost Communication with Electric A/C Compressor Control Module
U0170Lost Communication with Passenger Presence Detection Sensor Module
U0181Lost Communication With Headlamp Leveling Control Module
U0182Lost Communication With Lighting Control Module - Front
U0184Lost Communication With Radio
U0186Lost Communication With Speaker Amplifier Module
U0196Lost Communication With Rear Audio Control Module
U0191Lost Communication With Television
U0193Lost Communication With Digital Radio Receiver Control Module
U0197Lost Communication With Telephone Control Module
U0198Lost Communication With Telematic Control Module
U0201Lost Communication With Transfer Case Control Module
U0203Lost Communication With Left Rear Door Switch Panel Control Module
U0204Lost Communication With Right Rear Door Switch Panel Control Module
U0207Lost Communication With Moveable Roof Control Module
U0208Lost Communication with Seat Memory Control Module
U0209Lost Communication With Front Seat Heating Control Module
U0210Lost Communication With Rear Seat Heating Control Module
U0230Lost Communication With Liftgate Control Module
U0232Lost Communication with Side Object Detection Control Module - Left
U0233Lost Communication with Side Object Detection Control Module - Right
U0236Lost Communication With Steering Column Lock Module
U0237Lost Communication With Multimedia Player Interface Module
U023ALost Communication With Vehicle Direction Camera Control Module (without UGN)
Lost Communication With Active Safety Control Module (with UGN)
U0248Lost Communication with Remote Accessory Module
U0249Lost Communication with Entertainment Control Module - Rear
U0250Lost Communication with Impact Classification System Module
U0252Lost Communication With Trailer Interface Control Module
U0254Lost Communication With Remote Start Module
U0255Lost Communication With Info Display Module
U0256Lost Communication With Infotainment Faceplate Control Module
U0257Lost Communication With Info Display Module/Infotainment Faceplate Control Module
U0264Lost Communication With Camera Module - Rear
U0265Lost Communication with Left Front Short Range Radar Sensor Module
U0268Lost Communication with Right Front Short Range Radar Sensor Module
U0269Lost Communication with Front Long Range Object Sensor
U026ALost Communication with Frontview Camera Module
U026BLost Communication with Rear Short Range Object Sensor
U0293Lost Communication with Hybrid/EV Powertrain Control Module
U029DLost Communication with NOx Sensor 1 Module
U029ELost Communication with NOx Sensor 2 Module
U0301Software Incompatibility with Engine Control Module
U0302Software Incompatibility with Transmission Control Module
U0305Software Incompatibility With Cruise Control Module
U0315Software Incompatibility with Electronic Brake Control Module
U0401Invalid Data Received From Engine Control Module
U0402Invalid Data Received From Transmission Control Module
U0403Invalid Data Received From Transfer Case Control Module
U0405Invalid Data Received From Cruise Control Module
U0415Invalid Data Received From Electronic Brake Control Module
U0416Invalid Data Received From Vehicle Dynamics Control Module
U0417Invalid Data Received From Park Brake Control Module
U0418Invalid Data Received From Brake System Control Module
U0420Invalid Data Received From Power Steering Control Module
U0421Invalid Data Received From Suspension Control Module
U0422Invalid Data Received From Body Control Module
U0423Invalid Data Received From Instrument Cluster
U0424Invalid Data Received From HVAC Control Module
U0428Invalid Data Received From Steering Wheel Angle Sensor Module
U0431Invalid Data Received From Body Control Module "A"
U0432Invalid Data Received From Multi-axis Acceleration Sensor Module
U0437Invalid Data Received From Differential Control Module - Rear
U0438Invalid Data Received From Trailer Brake Control Module
U0452Invalid Data Received From Inflatable Restraint Sensing and Diagnostic Module
U0465Invalid Data Received From Power Take-Off Control Module
U0499Invalid Data Received From Telematic Control Module
U053BInvalid Data Received From Active Safety Control Module
U056BInvalid Data Received From Camera Module - Front
U0594Invalid Data Received From Hybrid/EV Powertrain Control Module
U1501LIN Bus 1
U1502LIN Bus 2
U1505LIN Bus 5
U150ELIN Bus 14
U150FLIN Bus 15
U1510(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 0 (B67 Ultrasonic Intrusion Sensor)
(K33 HVAC Control Module) LIN Bus 1 Lost Communication With Device 0 (A26 HVAC Controls)
(A11 Radio) LIN Bus 1 Lost Communication with Device 0 (A20 Radio/HVAC Control)
(P16 Instrument Cluster) LIN Bus 1 Lost Communication with Device 0 (S70R Steering Wheel Controls Switch - Right)
U1511(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 1 Lost Communication With Device 1 (E13L Headlamp - Left)
(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 1 (K99 Steering Column Position Control Module)
U1512(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 1 Lost Communication With Device 2 (E13R Headlamp - Right)
U1513(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 1 Lost Communication With Device 3 (E13L Headlamp - Left)
U1514(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 1 Lost Communication With Device 4 (E13R Headlamp - Right)
U1515(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 5 (M75 Windshield Wiper Motor)
U1516(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 6 (B110 Battery Sensor Module)
U1517(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 7 (K62 Sunroof Sunshade Motor Module)
U1518(P16 Instrument Cluster) LIN Bus 1 Lost Communication with Device 8 (P29 Head-Up Display)
U1519(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 9 (S52 Outside Rearview Mirror Switch)
(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 9 (K96 Mirror Control Module / K96L Mirror Control Module - Left)
U151A(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 10 (B117 Rain Sensor)
U151B(K9 Body Control Module) LIN Bus 1 Lost Communication With Device 11 (K61 Sunroof Control Module)
(K40 Seat Memory Control Module) LIN Bus 1 Lost Communication With Device 11 (S79P Window Switch - Passenger)
U151C(K33 HVAC Control Module) LIN Bus 1 Lost Communication With Device 0 (K33A HVAC Control Module - Auxiliary)
U1520(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 0 (P25 Power Sounder Content Theft Deterrent Alarm Module)
U1521(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 2 Lost Communication With Device 1 (E13L Headlamp - Left)
U1522(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 2 (K65 Tire Pressure Indicator Module)
(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 2 Lost Communication With Device 2 (E13R Headlamp - Right)
U1523(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 2 Lost Communication With Device 3 (E13L Headlamp - Left)
U1524(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 4 (K29F Seat Heating Control Module - Front)
(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 2 Lost Communication With Device 4 (E13R Headlamp - Right)
U1526(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 6 (K29R Seat Heating Control Module - Rear)
U152C(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 12 (K18 Compass Module)
U152D(K9 Body Control Module) LIN Bus 2 Lost Communication With Device 13 (P2 Transmission Shift Lever Position Indicator)
U1530(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 0 (M74P Window Motor - Passenger)
U1531(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 3 Lost Communication with Device 1 (E13LA Headlamp Assembly - Left)
U1532(K26 Headlamp Control Module / K28 Headlamp Leveling Control Module) LIN Bus 3 Lost Communication with Device 2 (E13RA Headlamp Assembly - Right)
U1534(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 4 (M74D Window Motor - Driver)
U1538(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 8 (S79D Window Switch - Driver)
U153A(K9 Body Control Module) LIN Bus 3 Lost Communication With Device 10 (S79P Window Switch - Passenger)
U1540(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 0 (M74RR Window Motor - Right Rear)
U1544(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 4 (M74LR Window Motor - Left Rear)
U1548(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 8 (S79LR Window Switch - Left Rear)
U154A(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 10 (S79RR Window Switch - Right Rear)
U154B(K9 Body Control Module) LIN Bus 4 Lost Communication With Device 11 (K49 Rear Seat Control Module)
U1556(K38 Chassis Control Module) LIN Bus 5 Lost Communication with Device 6 (K133 Trailer Brake Power Control Module)
U15E1(A11 Radio) LIN Bus 14 Lost Communication with Device 1 (A26 HVAC Controls)
U15E3(A11 Radio) LIN Bus 14 Lost Communication with Device 3
U15F0(K74 Human Interface Control Module) LIN Bus 15 Lost Communication with Device 0 (P17 Info Display Module)
U179314V Power Module Lost Communication with Hybrid/EV Powertrain Control Module on Powertrain Expansion Communication Bus
U179514V Power Module Powertrain Expansion Communication Bus Off
U179ALost Communication with Hybrid/EV Powertrain Control Module 2
U1803Lost Communication with Hybrid/EV Powertrain Control Module 2
U1804Lost Communication with Inside Rearview Mirror Control Module
U1806Battery Energy Control Module High Voltage Energy Management CAN Bus Off
U1807Battery Charger Control Module High Voltage Energy Management CAN Bus Off
U180AElectric A/C Compressor Control Module High Speed CAN Bus Off
U180BBattery Energy Control Module High Speed CAN Bus Off
U180CBattery Charger Control Module High Speed CAN Bus Off
U180DElectronic Brake Control Module Chassis Expansion CAN Bus Off
U1811Battery Energy Control Module Powertrain Expansion CAN Bus Off
U1814Powertrain Wake-Up Communication Circuit
U1815Lost Communication with Drive Motor Control Module 1 on Bus B
U1816Lost Communication with Drive Motor Control Module B on Bus B
U1817Lost Communication with Hybrid/EV Powertrain Control Module on Powertrain Expansion CAN Bus
U1818Lost Communication with Engine Control Module on Powertrain Expansion Communication Bus
U1821Lost Communication with 14V Power Module on Powertrain Expansion Communication Bus
U1826Lost Communication with Multi-Axis Acceleration Sensor Module on Powertrain Expansion CAN Bus
U1827Lost Communication with Steering Angle Sensor Module on Powertrain Expansion CAN Bus
U182AHybrid/EV Powertrain Control Module Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus
U182DLost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182EDrive Motor Control Module 1 Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U182FDrive Motor Control Module 2 Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U1831Drive Motor Control Module 1 Lost Communication with Hybrid/EV Powertrain Control Module on Powertrain Expansion CAN Bus
U1833Lost Communication with Electronic Brake Control Module on Chassis Expansion CAN Bus
U1838Lost Communication with Battery Charger Control Module on High Voltage Energy Management CAN Bus
U1839Auxiliary Transmission Fluid Pump Control Module Lost Communication with Engine Control Module
U183ALost Communication with Telematics Communication Interface Control Module on High Speed CAN Bus
U183BAuxiliary Transmission Fluid Pump Control Module Lost Communication with Transmission Control Module
U183CAuxiliary Transmission Fluid Pump Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2 on Powertrain Expansion Communication Bus
U183ELost Communication with Telematics Communication Interface Control Module on Low Speed CAN Bus
U1844Battery Energy Control Module Lost Communication with Hybrid/EV Powertrain Control Module on Bus B
U1845Drive Motor Control Module 1 Lost Communication with Hybrid/EV Powertrain Control Module
U1846Drive Motor Control Module 2 Lost Communication with Hybrid/EV Powertrain Control Module
U1847Drive Motor Control Module 1 Lost Communication with Battery Energy Control Module on Powertrain Expansion CAN Bus
U1849Drive Motor Control Module 1 Lost Communication with Transmission Control Module
U184ALost Communication with Body Control Module on Low Speed CAN Bus
U184BLost Communication with Remote Heater and Air Conditioning Control Module on Low Speed CAN Bus
U184CLost Communication with Instrument Cluster on Low Speed CAN Bus
U184DLost Communication with Radio on Low Speed CAN Bus
U184ELost Communication with Inflatable Restraint Sensing and Diagnostic Module on Low Speed CAN Bus
U184FElectric A/C Compressor Control Module Lost Communication with Engine Control Module
U1850Drive Motor Control Module 2 Lost Communication with Transmission Control Module
U1858Electronic Brake Control Module Lost Communication with Hybrid/EV Powertrain Control Module on Chassis Expansion CAN Bus
U185ALost Communication with Battery Energy Control Module on High Voltage Energy Management CAN Bus
U185BBattery Energy Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2 on High Voltage Energy Management CAN Bus
U185CBattery Charger Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2 on High Voltage Energy Management CAN Bus
U185DFuel Injector Control Module Lost Communication with Engine Control Module
U185EFuel Injector Control Module Lost Communication with Body Control Module
U1860Electric A/C Compressor Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U1861Battery Charger Control Module Lost Communication with Engine Control Module
U186AElectronic Brake Control Module Lost Communication with Engine Control Module
U186BElectronic Brake Control Module Lost Communication with Transmission Control Module
U1875Drive Motor Control Module 1 Lost Communication with Battery Energy Control Module
U1876Drive Motor Control Module 1 Lost Communication with Engine Control Module
U1879Drive Motor Control Module 2 Lost Communication with Engine Control Module
U1885Battery Energy Control Module Lost Communication with Hybrid/EV Powertrain Control Module
U1886Battery Energy Control Module Lost Communication with Engine Control Module
U1888Hybrid/EV Powertrain Control Module Lost Communication with Battery Energy Control Module
U18A1Lost Communication with Coolant Temperature Control Module on High Voltage Energy Management CAN Bus
U18A2Lost Communication with Fuel Pump Driver Control Module
U18A3Lost Communication with Human Machine Interface Control Module
U18A4Lost Communication with Hybrid/EV Battery DC Charging Communications Gateway Module on High Voltage Energy Management CAN Bus
U18A5Lost Communication with Fuel Injector Control Module on Powertrain Expansion CAN Bus
U18B9Primary High Speed CAN Bus Subnet Configuration List
U18BFSecondary High Speed CAN Bus Subnet Configuration List
U1900Lost Communication With Speech to Text Interface Module
U1901Lost Communication with Infotainment Multifunction Switch Module
U2098MOST Communication Enable Circuit
U2099High Speed Communication Enable Circuit
U209EObject Detection Control Module High Speed Communication Enable Circuit 1
U209FObject Detection Control Module High Speed Communication Enable Circuit 2
U2100CAN Bus Communication
U2101CAN Bus Maximum List of Control Modules
U2103Fewer Controllers On Bus Than Programmed
U2105Lost Communication with Engine Control Module
U2106Lost Communication with Transmission Control Module
U2107Lost Communication with Body Control Module
U2108Lost Communication with Electronic Brake Control Module
U2125Lost Communication with Telematic Unit
U2127Lost Communication with Front HVAC Control Module
U2139Lost Communication with Column Integration Module
U2144Lost Communication with Distance Sensing Cruise Control Module
U2176Lost Communication with Power Take-Off Control Module
U2178Lost Communication With Trailer Interface Control Module
U2400Fuel Injector Control Module High Speed CAN Bus Off
U2401Battery Energy Control Module Dedicated Bus 1 Off
U2501Invalid Data Received From Hybrid/EV Powertrain Control Module 2
U2502Invalid Data Received From Electronic Brake Control Module on Chassis Expansion CAN Bus
U2503Invalid Data Received From Object Detection Control Module
U2504Invalid Data Received From Trailer Brake Driver Control Module
U2505Invalid Data Received from Human Machine Interface Control Module on MOST Bus
U2506Invalid Data Received From Dual Battery Control Module
U2507Invalid Data Received from Instrument Cluster on MOST Bus
U2508Invalid Data Received from Audio Amplifier on MOST Bus
U2602Battery Energy Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U2603Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 1
U2604Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 2
U2605Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 3
U2606Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 4
U2608Electric A/C Compressor Control Module Lost Communication with Hybrid/EV Powertrain Control Module
U2609Battery Charger Control Module Lost Communication with Hybrid/EV Powertrain Control Module
U2611Auxiliary Transmission Fluid Pump Control Module Lost Communication with Hybrid/EV Powertrain Control Module
U2612Battery Charger Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U2613Drive Motor 1 Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U2614Drive Motor 2 Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U2615Auxiliary Transmission Fluid Pump Control Module Lost Communication with Hybrid/EV Powertrain Control Module 2
U2616Fuel Pump Driver Control Module Lost Communication with ECM
U2617Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 5
U2618Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 6
U2619Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 7
U2620Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 8
U2621Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 9
U2622Battery Energy Control Module Lost Communication with Hybrid/EV Battery Interface Control Module 10

Control Module U Code List

Reference Information

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC B1000 is not set. If DTC B1000 is set Replace the device that set the DTC. If DTC B1000 is not set
  3. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC B1001 is not set. If DTC B1001 is set Program the device that set the DTC. Verify the DTC does not set. If the DTC sets, replace the device that set the DTC. If the DTC does not set All OK. If DTC B1001 is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC B101D is not set. If DTC B101D is set with symptom byte 43 Program the device that set the DTC. Verify the DTC does not set. If the DTC sets, replace the device that set the DTC. If the DTC does not set All OK. If DTC B101D is set with any symptom byte, except symptom byte 43 Replace the device that set the DTC. If DTC B101D is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify that DTC U0028 or U0029 is not set. If any of the DTCs are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If none of the DTCs are set
  3. Verify DTC B101E is not set. If DTC B101E is set Program the device that set the DTC. Verify the DTC does not set. If the DTC sets, replace the device that set the DTC. If the DTC does not set All OK. If DTC B101E is not set
  4. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC C056D is not set. If DTC C056D is set in a device that can be programmed Program the device that set the DTC. Verify the DTC does not set. If the DTC sets, replace the device that set the DTC. If the DTC does not set All OK. If DTC C056D is set in a device that cannot be programmed Replace the device that set the DTC. If DTC C056D is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

Data Communication Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool References

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC C056E is not set. If DTC C056E is set Program the device that set the DTC. Verify the DTC does not set. If the DTC sets, replace the device that set the DTC. If the DTC does not set All OK. If DTC C056E is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

Data Communication Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool References

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC P0602 is not set. If DTC P0602 is set Program the device that set the DTC. Verify the DTC does not set. If the DTC sets, replace the device that set the DTC. If the DTC does not set All OK. If DTC P0602 is not set
  3. Verify DTC P0601, P0603, P0604, P0606, or P062F is not set. If DTC P0601, P0603, P0604, P0606, or P062F is set Replace the device that set the DTC. If DTC P0601, P0603, P0604, P0606, or P062F is not set
  4. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

This DTC may not be retrieved with a current status. Diagnosis is accomplished via the symptom, Scan Tool Does Not Communicate with High Speed GMLAN Device. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device in order to isolate an intermittent condition caused by a short on the GMLAN serial data circuits.

Action Taken When the DTCs Sets

The device uses a default value for the missing parameter.

Diagnosis of this DTC is accomplished via the symptom or an additional DTC. Refer to Scan Tool Does Not Communicate with Low Speed GMLAN Device , or Diagnostic Trouble Code (DTC) List - Vehicle .

  1. The device suspends all message transmission.
  2. The device uses default values for all parameters received on the serial data circuits.
  3. In the transmission control module, DTC U0073 will cause the transmission to go into default gears.
  4. In the engine control module and transmission control module, DTC U0073 will cause the malfunction indicator lamp (MIL) to illuminate.
  5. If equipped with eAssist, DTC U0073 in the hybrid powertrain control module is a type B DTC and will cause the malfunction indicator lamp to illuminate and result in the engine operating in conventional engine mode and will maintain 14 V module operation.
  6. The device inhibits the setting of all other communication DTCs.
  1. Refer to «Data Link References»(ref-544492-S32517214662013042400000) to determine which serial data communication system is used for a specific device.
  2. This DTC may not be retrieved with a current status. Diagnosis is accomplished using the symptom. Refer to «Symptoms - Data Communications»(ref-544492-S13530583662013042400000) .

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify two or more devices are not communicating on the chassis high speed GMLAN serial data circuit. Refer to «Data Link References»(ref-544492-S32517214662013042400000) to determine how many devices should be communicating on the bus. If only one device is not communicating Refer to Circuit/System Testing - Testing the Device Circuits. If two or more devices are not communicating
  3. Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. Disconnect the scan tool from the X84 Data Link Connector. The following tests will be done at the X84 Data Link Connector. It may take up to 2 minutes for all vehicle systems to power down.
  4. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  5. Ignition ON.
  6. Test for less than 4.5 V between the serial data circuits listed below and ground: Chassis high speed GMLAN serial data terminal 12 Chassis high speed GMLAN serial data terminal 13 If 4.5 V or greater Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Voltage. If less than 4.5 V
  7. Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. It may take up to 2 minutes for all vehicle systems to power down.
  8. Test for greater than 100 ohms between the serial data circuits listed below and ground: Chassis high speed GMLAN serial data terminal 12 Chassis high speed GMLAN serial data terminal 13 If 100 ohms or less Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Ground. If greater than 100 ohms
  9. Test for 50-70 ohms between the serial data circuit terminals 12 and 13: If less than 35 ohms Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short between the Circuits. If between 35-50 ohms There may be a third terminating resistor between the serial data circuits. This can happen if the incorrect device is installed. Some devices are available with and without the terminating resistors installed to reduce the need of terminating resistors in the wiring harness. Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short between the Circuits. If greater than 70 ohms but less than infinite Refer to Circuit/System Testing - Testing the Serial Data Circuits for an Open/High Resistance. If infinite resistance Repair the open/high resistance in the circuit between the X84 Data Link Connector and the first splice/device in the serial data circuit. If between 50-70 ohms
  10. Refer to Circuit/System Testing - Testing the Device Circuits.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup
  1. Ignition ON.
  2. Verify DTC U0078 is not set. If DTC U0078 is set Refer to «Scan Tool Does Not Communicate with Low Speed GMLAN Device»(ref-544492-S21783918672013042400000) . If DTC U0078 is not set
  3. All OK

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Determine the device that is not communicating. Refer to «Control Module U Code List»(ref-544492-S16486046762013042400000) .
  2. Verify that DTC U0073, U2100, U0074, U0078, U1814, U2099, B1325, B1330, B1370, B1380, B1424, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, or P0562 is not set. If any of the DTCs are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If none of the DTCs are set
  3. Verify that DTC U0125 and DTC U0126 are not set together. If both of the DTCs are set together Refer to «Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device»(ref-544492-S22472375712013042400000) . If both of the DTCs are not set together
  4. Engine running for 10 s.
  5. Ignition ON, engine OFF, verify that DTC U0100-U02FF is not set. If the DTC U0100-U02FF is set in any device, except the K17 Electronic Brake Control Module Refer to Circuit/System Testing. If the DTC U0100-U02FF is set in the K17 Electronic Brake Control Module with any symptom byte, except symptom bytes 71, 72, and 74 Refer to Circuit/System Testing. If the DTC U0100-U02FF is set in the K17 Electronic Brake Control Module with symptom byte 71, 72, or 74 along with other DTCs set Diagnose all other DTCs first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If the DTC U0100-U02FF is set in the K17 Electronic Brake Control Module with symptom byte 71, 72, or 74 and without other DTCs set Program the K17 Electronic Brake Control Module. Verify the DTC does not set. If the DTC sets, replace the K17 Electronic Brake Control Module. If the DTC does not set All OK. If the DTC U0100-U02FF is not set
  6. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC U0300-U0336 is not set. If DTC U0300-U0336 is set Program the device specified by the DTC descriptor. Verify the DTC does not set. If the DTC sets, replace the device specified by the DTC descriptor. If the DTC does not set All OK. If DTC U0300-U0336 is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Engine running for 10 s.
  2. Ignition ON, engine OFF, verify DTC U0400-U05FF is not set. If DTC U0400-U05FF is set along with other DTCs set Diagnose all other DTCs first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If DTC U0400-U05FF is set without other DTCs set Program the device specified by the DTC descriptor. Verify the DTC does not set. If the DTC sets, replace the appropriate device. If the DTC does not set All OK. If DTC U0400-U05FF is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Determine the LIN device that is not communicating. Refer to «Control Module U Code List»(ref-544492-S16486046762013042400000) .
  2. Verify that DTC B1325, B1330, B1370, B1380, B1424, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, or P0562 is not set. If any of the DTCs are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If none of the DTCs are set
  3. Refer to Circuit/System Testing.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify DTC U18B9-U18BF is not set. If DTC U18B9-U18BF is set along with other DTCs set Diagnose all other DTCs first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If DTC U18B9-U18BF is set without other DTCs set Program the device that set the DTC. Ignition OFF, remove the scan tool, open and close the driver door. Wait 60 s. Verify the DTC does not set. If the DTC sets, replace the appropriate device. If the DTC does not set All OK. If DTC U18B9-U18BF is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References

  1. Ignition ON.
  2. Verify DTC U2101 is not set. If DTC U2101 is set along with other DTCs set Diagnose all other DTCs first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-544470-S39215059612013042400000) . If DTC U2101 is set without other DTCs set Program the device that set the DTC. Clear the DTC. Ignition OFF, remove the scan tool, open and close the driver door. Wait 60 s. Verify the DTC does not set. If the DTC sets, replace the appropriate device. If the DTC does not set All OK. If DTC U2101 is not set
  3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for device replacement, programming and setup

Symptoms - Data Communications

Note. The following steps must be completed before using the symptom tables.

  1. Perform the «Diagnostic System Check - Vehicle»(ref-544470-S31312478522013042400000) before using the symptom tables in order to verify that all of the following are true: There are no Diagnostic Trouble Codes (DTC) set. The devices can communicate via the serial data links.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Data Link Communications Description and Operation»(ref-544492-S05690012742013042400000) .

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify two or more devices are not communicating on the chassis high speed GMLAN serial data circuit. Refer to «Data Link References»(ref-544492-S32517214662013042400000) to determine how many devices should be communicating on the bus. If only one device is not communicating Refer to Circuit/System Testing - Testing the Device Circuits. If two or more devices are not communicating
  3. Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. Disconnect the scan tool from the X84 Data Link Connector. The following tests will be done at the X84 Data Link Connector. It may take up to 2 minutes for all vehicle systems to power down.
  4. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  5. Ignition ON.
  6. Test for less than 4.5 V between the serial data circuits listed below and ground. Terminal 12 Terminal 13 If 4.5 V or greater Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Voltage. If less than 4.5 V
  7. Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 m (9.8 ft) away from vehicle. It may take up to 2 minutes for all vehicle systems to power down.
  8. Test for greater than 100 ohms between the serial data circuits listed below and ground. Terminal 12 Terminal 13 If 100 ohms or less Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Ground. If greater than 100 ohms
  9. Test for 50-70 ohms between the serial data circuit terminals 12 and 13. If less than 35 ohms Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short between the Circuits. If between 35-50 ohms There may be a third terminating resistor between the serial data circuits. This can happen if the incorrect device is installed. Some devices are available with and without the terminating resistors installed to reduce the need of terminating resistors in the wiring harness. Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short between the Circuits. If greater than 70 ohms but less than infinite Refer to Circuit/System Testing - Testing the Serial Data Circuits for an Open/High Resistance. If infinite resistance Repair the open/high resistance in the circuit between the X84 Data Link Connector and the first splice/device in the serial data circuit. If between 50-70 ohms
  10. Refer to Circuit/System Testing - Testing the Device Circuits.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify two or more devices are not communicating on the high speed GMLAN serial data circuit. Refer to «Data Link References»(ref-544492-S32517214662013042400000) to determine how many devices should be communicating on the bus. If only one device is not communicating Refer to Circuit/System Testing - Testing the Device Circuits. If two or more devices are not communicating
  3. Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 meters (9.8 feet) away from vehicle. Disconnect the scan tool from the X84 data link connector. The following tests will be done at the X84 data link connector. It may take up to 2 minutes for all vehicle systems to power down.
  4. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  5. Ignition ON.
  6. Test for less than 4.5 V between the serial data circuits listed below and ground. Terminal 6 Terminal 14 If 4.5 V or greater Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Voltage. If less than 4.5 V
  7. Ignition OFF, all access doors closed, all vehicle systems OFF, and all keys at least 3 meters (9.8 feet) away from vehicle. It may take up to 2 minutes for all vehicle systems to power down.
  8. Test for greater than 100 ohms between the serial data circuits listed below and ground. Terminal 6 Terminal 14 If 100 ohms or less Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Ground. If greater than 100 ohms
  9. Test for 50-70 ohms between the serial data circuit terminals 6 and 14. If less than 35 ohms Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short between the Circuits. If between 35-50 ohms There may be a third terminating resistor between the serial data circuits. This can happen if the incorrect device is installed. Some devices are available with and without the terminating resistors installed to reduce the need of terminating resistors in the wiring harness. Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short between the Circuits. If greater than 70 ohms but less than infinite Refer to Circuit/System Testing - Testing the Serial Data Circuits for an Open/High Resistance. If infinite resistance Repair the open/high resistance in the circuit between the X84 data link connector and the first splice/device in the serial data circuit. If between 50-70 ohms
  10. Refer to Circuit/System Testing - Testing the Device Circuits.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Schematic Reference

  1. «Data Communication Schematics»(ref-544492-S23415892822013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS -- INDEX

Description and Operation

Data Link Communications Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-544474-S28522670622013042400000)
  2. «Connector Repairs»(ref-544474-S01694319662013042400000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-544474-S10250380742013042400000)
  4. «Wiring Repairs»(ref-544474-S21510154002013042400000)

Scan Tool Reference

Control Module References for scan tool information

Note. Use the schematic to identify the following: Devices the vehicle is equipped with Device and splice pack locations on the low speed GMLAN serial data circuit The low speed GMLAN serial data circuit terminals for each device or splice pack

  1. Attempt to communicate with all devices on the low speed GMLAN serial data circuit. Refer to «Data Link References»(ref-544492-S32517214662013042400000) .
  2. Verify which devices are communicating on the low speed GMLAN serial data circuit. If only one device is not communicating Diagnose that device only. Refer to «DTC U0100-U02FF»(ref-544492-S30124306732013042400000) . If one or more devices are communicating but not all Refer to Circuit/System Testing - Testing the Serial Data Circuit for an Open/High Resistance. If none of the devices are communicating
  3. Ignition OFF, all access doors closed, all vehicle systems OFF, all keys at least 3 m (9.8 ft) away from vehicle. Disconnect the scan tool from the X84 Data Link Connector. The following tests will be done at the X84 Data Link Connector. It may take up to 2 minutes for all vehicle systems to power down.
  4. Test for less than 10 ohms between the ground circuit terminal 5 and ground. If 10 ohms or greater Ignition OFF. Test for less than 2 ohms in the ground circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, repair the open/high resistance in the ground connection. If less than 10 ohms
  5. Ignition ON.
  6. Test for less than 4.5 V between the serial data circuit terminal 1 and ground. If 4.5 V or greater Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Voltage. If less than 4.5 V
  7. Ignition OFF, all access doors closed, all vehicle systems OFF, all keys at least 3 m (9.8 ft) away from vehicle. It may take up to 2 minutes for all vehicle systems to power down.
  8. Test for greater than 100 ohms between the serial data circuit terminal 1 and ground. If 100 ohms or less Refer to Circuit/System Testing - Testing the Serial Data Circuits for a Short to Ground. If greater than 100 ohms
  9. Disconnect the appropriate harness connector at the first splice pack closest in the circuit to the X84 Data Link Connector.
  10. Test for less than 2 ohms between the X84 Data Link Connector's serial data circuit terminal 1 and the splice pack harness connector's serial data input terminal. If 2 ohms or greater Repair the open/high resistance in the serial data circuit. If less than 2 ohms
  11. Replace the splice pack.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «GMLAN and Media Oriented Systems Transport (MOST) Wiring Repairs»(ref-544488-S05796214642013042400000)
  2. «Control Module References»(ref-544475-S18239609172013042400000) for device replacement, programming and setup

Data Link References

This table identifies which serial data link that a particular device uses for in-vehicle data transmission. Some devices may use more than one data link to communicate. Some devices may have multiple communication circuits passing through them without actively communicating on that data link. This table is used to assist in correcting a communication malfunction. Not all devices listed will be applicable to all vehicles. Refer to the schematics to determine which devices apply. For the description and operation of these serial data communication circuits, refer to Data Link Communications Description and Operation .

CodeDeviceData Link TypeDiagnostic Procedure
Schematic Reference: Data Communication Schematics
A11RadioLow Speed GMLANScan Tool Does Not Communicate with Low Speed GMLAN Device
B119Multi-axis Acceleration SensorChassis High Speed GMLANScan Tool Does Not Communicate with Chassis High Speed GMLAN Device
K9Body Control ModuleHigh Speed GMLAN Low Speed GMLANScan Tool Does Not Communicate with High Speed GMLAN Device Scan Tool Does Not Communicate with Low Speed GMLAN Device
K17Electronic Brake Control ModuleHigh Speed GMLAN Chassis High Speed GMLANScan Tool Does Not Communicate with High Speed GMLAN Device Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device
K20Engine Control ModuleHigh Speed GMLANScan Tool Does Not Communicate with High Speed GMLAN Device
K36Inflatable Restraint Sensing and Diagnostic ModuleLow Speed GMLANScan Tool Does Not Communicate with Low Speed GMLAN Device
K43Power Steering Control ModuleHigh Speed GMALNScan Tool Does Not Communicate with High Speed GMLAN Device
K71Transmission Control ModuleHigh Speed GMLANScan Tool Does Not Communicate with High Speed GMLAN Device
K73Telematics Communication Interface Control ModuleHigh Speed GMALN Low Speed GMLANScan Tool Does Not Communicate with High Speed GMLAN Device Scan Tool Does Not Communicate with Low Speed GMLAN Device
K85Passenger Presence Detection ModuleLow Speed GMLANScan Tool Does Not Communicate with Low Speed GMLAN Device
P16Instrument ClusterLow Speed GMLANScan Tool Does Not Communicate with Low Speed GMLAN Device

Data Link References

Scheme 12

Scheme 12: Body Control Module Replacement
Scheme 12: Body Control Module Replacement
CalloutComponent Name
Preliminary Procedures Prepare body control module for replacement. Refer to Control Module References . Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection . Remove instrument panel lower reinforcement bracket. Refer to Instrument Panel Lower Reinforcement Bracket Replacement .
1Body Control Module Procedure Disconnect electrical connector. Unclip body control module from body control module bracket. After replacement, refer to Control Module References for programming and set up procedures.

Body Control Module Replacement

Scheme 13

Scheme 13: Body Control Module Bracket Replacement
Scheme 13: Body Control Module Bracket Replacement
CalloutComponent Name
Preliminary Procedures Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection . Remove the body control module. Refer to Body Control Module Replacement .
1Body Control Module Bracket Nut (Qty: 3) CAUTION: Refer to Fastener Caution .
2Body Control Module Bracket
CAUTION
Refer to Fastener Caution .

Body Control Module Bracket Replacement

Power Mode Master

This vehicle body control module (BCM) functions as the power mode master (PMM). The ignition switch is a low current switch with multiple discrete ignition switch signals to the PMM for determining the power mode that will be sent over the serial data circuits to the other modules that need this information; the PMM will activate relays and other direct outputs of the PMM as needed. Refer to Power Mode Description and Operation for a complete description of power mode functions.

Gateway

The body control module (BCM) in this vehicle functions as a gateway or translator. The purpose of the gateway is to translate serial data messages between the GMLAN high speed bus and the GMLAN low speed bus for communication between the various modules. The gateway will interact with each network according to that network's transmission protocol.

All communication between the BCM and a scan tool is on the high speed GMLAN serial data circuits. A lost communication DTC typically is set in modules other than the module with a communication failure.

Body Control

The various body control module (BCM) input and output circuits are illustrated in the corresponding functional areas on the BCM electrical schematics. Refer to the Body Control System Schematics for more detailed information.

Data Link Connector (DLC)

The X84 Data Link Connector (DLC) is a standardized 16-cavity connector. Connector design and location is dictated by an industry wide standard, and is required to provide the following

  1. Pin 1 Low speed GMLAN communications terminal
  2. Pin 2 Class 2 communications terminal
  3. Pin 3 Mid speed GMLAN serial bus (+) terminal or Object high speed GMLAN serial bus (+) terminal
  4. Pin 4 Scan tool power ground terminal
  5. Pin 5 Common signal ground terminal
  6. Pin 6 High speed GMLAN serial data bus (+) terminal
  7. Pin 7 Keyword communications terminal
  8. Pin 11 Mid speed GMLAN serial bus (-) terminal or Object high speed GMLAN serial bus (-) terminal
  9. Pin 12 Chassis high speed GMLAN serial bus (+) terminal
  10. Pin 13 Chassis high speed GMLAN serial bus (-) terminal
  11. Pin 14 High speed GMLAN serial data bus (-) terminal
  12. Pin 16 Scan tool power, battery positive voltage terminal

Serial Data Reference

The scan tool communicates over the various buses on the vehicle. When a scan tool is installed on a vehicle, the scan tool will try to communicate with every device that could be optioned into the vehicle. If an option is not installed on the vehicle, the scan tool will display No Comm (or Not Connected) for that optional device. In order to avert misdiagnoses of No Communication with a specific device, refer to Data Link References for a list of devices, the buses they communicate with, and the RPO codes for a specific device.

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