Home»Freightliner » Freightliner Business Class M2 Fault Codes List – Bulkhead Module
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See also:
- Freightliner Business Class M2 Fault Codes List – ABS System Troubleshooting
- Freightliner Business Class M2 Fault Codes List – Automated-Manual Transmissions
Bulkhead Module Fault Codes PDF
Freightliner Business Class M2 Fault Codes List – Bulkhead Module PDF
Bulkhead Module Fault Code Information
| J1587 SIDs for Bulkhead Module (BHM) MID 164 | ||
| SID | Description | Possible FMI |
| 000 | Backlighting Dimmer Switch Fault | 7 |
| 001 | Clutch Switch Fault | 7 |
| 002 | Reserved for Future Use | — |
| 003 | Headlamp Switch Disagreement–Both park and on inputs are closed | 7 |
| 004 | Multifunction Turn Signal Switch High Beam Input Fault | 2 |
| 005 | Ignition Switch Fault | 7 |
| 006 | Marker Interrupt Switch Fault | 7 |
| 007 | Multifunction Turn Signal Switch Disagreement–Both wiper high and wiper low inputs are on. | 2 |
| 008 | Multifunction Turn Signal Switch Disagreement–Wiper on/off is off and wiper high or low input is on | 2 |
| 009 | Wiper Park Input Fault | 7 |
| 010 | ICU3-M2 Hazard Switch CAN Feedback Error | 2 |
| 011 | Multifunction Turn Signal Switch Left Turn Signal Input Fault | 2 |
| 012 | Multifunction Turn Signal Switch Right Turn Signal Input Fault | 2 |
| 013 | Multifunction Turn Signal Switch Washer Switch Input Fault | 2 |
| 014 | Multifunction Turn Signal Switch Wiper On/Off Input Fault | 2 |
| J1587 SIDs for Bulkhead Module (BHM) MID 164 | ||
| SID | Description | Possible FMI |
| 015 | Multifunction Turn Signal Switch Wiper Low Input Fault | 2 |
| 016 | Multifunction Turn Signal Switch Wiper High Input Fault | 2 |
| 017 | Wheel-Based Vehicle Speed CAN Message Error | 2 |
| 018 | Wake-up Hardware Fault–Modules are kept awake | 7 |
| 019 | Unknown Keep Awake Fault–Modules are kept awake. | 7 |
| 020 | Extra Smart Switch | 7 |
| 021 | Duplicate Smart Switch | 7 |
| 022 | Missing Smart Switch | 7 |
| 023 | Fifth Wheel Solenoid Unexpected Pressure Feedback | 7 |
| 024 | Fifth Wheel Solenoid No Pressure Feedback | 7 |
| 025 | End of Frame Air Unexpected Pressure Feedback | 7 |
| 026 | End of Frame Air No Pressure Feedback | 7 |
| 027 | Axle Lift Unexpected Pressure Feedback | 7 |
| 028 | Axle Lift No Pressure Feedback | 7 |
| 029 | Suspension Dump Unexpected Pressure Feedback | 7 |
| 030 | Suspension Dump No Pressure Feedback | 7 |
| 031 | Suspension Proportioning Unexpected Pressure Feedback | 7 |
| 032 | Suspension Proportioning No Pressure Feedback | 7 |
| 033 | Cigar Lighter Output Fault | 7 |
| 034 | BHM/ICU3-M2 Ignition Mismatch | 7 |
| 035 | BHM/ICU3-M2 Hazard Switch Mismatch | 2 |
| 036 | BHM/ICU3-M2 Wiper Park Mismatch | 2 |
| 037 | Missing Transmission CAN Message | 9 |
| 038 | Missing Chassis Module CAN Message | 9 |
| 039 | Remote Bucket Switch Stuck Fault | 7 |
| 040 | Axle Lift 2 Unexpected Pressure Feedback | 7 |
| 041 | Axle Lift 2 No Pressure Feedback | 7 |
| 042 | PTO 1 Unexpected Pressure Feedback | 7 |
| 043 | PTO 1 No Pressure Feedback | 7 |
| 044 | PTO 2 Unexpected Pressure Feedback | 7 |
| 045 | PTO 2 No Pressure Feedback | 7 |
| 046 | CHM No PWM DRLs Fault | 8 |
| 047–049 | Reserved for Future Use | — |
| 050 | BHM B1.A—Fuel Level Input Fault (Not Used) | 3, 4 |
| 051 | BHM B1.F, B1.P, B2.K, B2.L, B6.A8—Ignition Power Output Fault | 5, 6 |
| 052 | BHM B1.J—Main BHM Power VBAT5 Input Fault | 3, 4 |
| J1587 SIDs for Bulkhead Module (BHM) MID 164 | ||
| SID | Description | Possible FMI |
| 053 | BHM B1.K, B5.C—Tail/Clearance Lamp Output Fault | 5, 6 |
| 054 | BHM B1.L—Left High Beam Output Fault | 5, 6 |
| 055 | BHM B1.N—Main BHM Power VBAT3 Input Fault | 3, 4 |
| 056 | BHM B1.R—Left Low Beam Output Fault | 5, 6 |
| 057 | BHM B2.M—A/C Clutch Output Fault | 5, 6 |
| 058 | BHM B3.D—Main BHM Power VBAT1 Input Fault | 3, 4 |
| 059 | BHM B3.E—Horn Output Fault | 3, 4, 5, 6 |
| 060 | BHM B3.F—Wiper High Speed Output Fault | 5, 6 |
| 061 | BHM B3.G—Washer Pump Output Fault | 5, 6 |
| 062 | BHM B3.H—Wiper Low Speed Output Fault | 5, 6 |
| 063 | BHM B4.B—Starter Relay Output Fault | 5, 6 |
| 064 | BHM B4.E, B4.F—Spare Output Fault | 3, 4, 5, 6 |
| 065 | BHM B4.G—Main BHM Power VBAT2 Input Fault | 3, 4 |
| 066 | BHM B4.K—Main BHM Power VBAT4 Input Fault | 3, 4 |
| 067 | BHM B4.M, B5.E—Spare Output Fault | 3, 4, 5, 6 |
| 068 | BHM B5.A, B7.A12—Dome Lamp Battery Power Output Fault | 5, 6 |
| 069 | BHM B6.A9, B6.A10—HVAC/Radio Ignition Power Output Fault | 5, 6 |
| 070 | BHM B5.B—Dome Lamp Switched Power Output Fault | 5, 6 |
| 071 | BHM B5.D—ICU Wake Output Fault | 5, 6 |
| 072 | BHM B5.F—Cigar Light Output Fault | 3, 4, 5, 6 |
| 073 | BHM B5.G—Spare Ignition Power Output Fault | 3, 4, 5, 6 |
| 074 | BHM B5.H, B7.A1—Panel Lamps Output Fault | 3, 4, 5, 6 |
| 075 | CHM C1.A, C1.H, C1.J—Backup Lamps/Alarm Output Fault | 5, 6 |
| 076 | CHM C1.G, C2.H, C3.N—Left Turn Signal Output Fault | 5, 6 |
| 077 | CHM C1.L—Right Stop Lamp Output Fault | 5, 6 |
| 078 | CHM C1.N—Left Stop Lamp Output Fault | 5, 6 |
| 079 | CHM C1.P, C2.E, C3.R—Right Turn Signal Output Fault | 5, 6 |
| 080 | CHM C2.A—Trailer Power Relay Output Fault | 3, 4 |
| 081 | CHM C2.F, C4.C, C4.D, C4.L, C4.M—Park/Marker Lamp Output | 3, 4, 5, 6 |
| 082 | CHM C3.A—Spare Output Fault | 3, 4, 5, 6 |
| 083 | CHM C3.C, C3.D—Spare Output Fault | 5, 6 |
| 084 | CHM C3.E—Low Air Pressure Input Fault | 3, 4 |
| 085 | CHM C3.F—Park Brake Input Fault | 3, 4 |
| 086 | CHM C3.J—Main CHM Power VBAT2 Input Fault | 3, 4 |
| 087 | CHM C3.K—Right DRL Output Fault | 5, 6 |
| 088 | CHM C3.L—Right Low Beam Output | 5, 6 |
| J1587 SIDs for Bulkhead Module (BHM) MID 164 | ||
| SID | Description | Possible FMI |
| 089 | CHM C4.F—Left DRL Output Fault | 5, 6 |
| 090 | CHM C4.J—Main CHM Power VBAT3 Input Fault | 3, 4 |
| 091 | CHM C4.K—Right High Beam Output | 5, 6 |
| 092 | CHM C4.P—Main CHM Power VBAT1 Input Fault | 3, 4 |
| 093 | CHM C5.A—Solenoid #0 Pressure Feedback Fault | 3, 4 |
| 094 | CHM C5.B—Solenoid #1 Pressure Feedback Fault | 3, 4 |
| 095 | CHM C5.F—Solenoid #2 Pressure Feedback Fault | 3, 4 |
| 096 | CHM C5.G—Solenoid #3 Pressure Feedback Fault | 3, 4 |
| 097 | CHM C5.H—Solenoid #0 Output Fault | 3, 4 |
| 098 | CHM C5.J—Solenoid #1 Output Fault | 3, 4 |
| 099 | CHM C5.L—Solenoid #2 Output Fault | 3, 4 |
| 100 | CHM C5.M—Solenoid #3 Output Fault | 3, 4 |
| 101 | EXM Fault (Fault in one of the EXM Outputs) | 3, 4, 5, 6 |
| J1939 SPNs for Bulkhead Module (BHM) SA 33 | ||
| SPN | Description | Possible FMI |
| 70 | Parking Brake Switch | 2 |
| 80 | Washer Fluid Level | 2 |
| 84 | Wheel-based Vehicle Speed | 19 |
| 96 | Fuel Level | 19 |
| 97 | Water In Fuel Indicator | 19 |
| 163 | Transmission Current Range | 12, 19 |
| 177 | Transmission Oil Temperature Sensor | 3, 4 |
| 523 | Transmission Current Gear | 12, 19 |
| 524 | Transmission Selected Gear | 12, 19 |
| 597 | ABS Service Brake Switch | 2 |
| 598 | Clutch Switch | 7 |
| 879 | Front Left Turn Signals Output Fault | 5, 6 |
| 880 | Trailer Stop Lamp Relay Output Fault | 4 |
| 881 | Front Right Turn Signals Output Fault | 5, 6 |
| 882 | Park/Marker Lights Output Fault | 4, 5, 6 |
| 973 | Engine Retarder Selection | 19 |
| 1487 | Backlighting Dimmer Switch Fault | 7 |
| 1550 | A/C Clutch Output Fault | 5, 6 |
| 2003 | Missing Transmission CAN Message | 9 |
| J1939 SPNs for Bulkhead Module (BHM) SA 33 | ||
| SPN | Description | Possible FMI |
| 2071 | Missing Chassis Module CAN Message | 9 |
| 6890 | CHM No PWM DRLs Fault | 8 |
| 6897 | Fuel Water Separator Heater Output Fault | 6 |
| 6898 | Brake Air Dryer Output Fault | 6 |
| 6906 | PTO 2 No Pressure Feedback | 7 |
| 6907 | PTO 2 Unexpected Pressure Feedback | 7 |
| 6908 | PTO 1 No Pressure Feedback | 7 |
| 6909 | PTO 1 Unexpected Pressure Feedback | 7 |
| 6910 | Axle Lift 2 No Pressure Feedback | 7 |
| 6911 | Axle Lift 2 Unexpected Pressure Feedback | 7 |
| 6912 | Remote Bucket Switch Stuck Fault | 7 |
| 6915 | Lamp and Gauge Ignition Output Fault | 4, 5, 6 |
| 6916 | BHM/ICU3-M2 Wiper Park CAN Message Mismatch | 2 |
| 6917 | BHM/ICU3-M2 Hazard Switch CAN Message Mismatch | 2 |
| 6918 | Missing Smart Switch | 7 |
| 6919 | Duplicate Smart Switch | 7 |
| 6920 | Extra Smart Switch | 7 |
| 6921 | Unknown Keep Awake Fault–Modules are kept awake | 7 |
| 6922 | Wake-up Hardware Fault–Modules are kept awake | 7 |
| 6923 | Wiper Parked Input Fault | 7 |
| 6924 | Multifunction Turn Signal Switch Disagreement–Wiper on/off input is off and wiper high or low input is on | 2 |
| 6925 | Multifunction Turn Signal Switch Disagreement–Both wiper high and wiper low inputs are on | 2 |
| 6926 | Marker Interrupt Switch Fault | 7 |
| 6927 | Utility Lamp Output Fault | 3, 4, 5, 6 |
| 6928 | Suspension Proportioning No Pressure Feedback | 7 |
| 6929 | Suspension Proportioning Unexpected Pressure Feedback | 7 |
| 6930 | Suspension Proportioning Solenoid Output Fault | 3, 4, 5, 6 |
| 6931 | Suspension Dump No Pressure Feedback | 7 |
| 6932 | Suspension Dump Unexpected Pressure Feedback | 7 |
| 6933 | Suspension Dump Solenoid Output Fault | 3, 4, 5, 6 |
| 6934 | Spotlights Output Fault | 3, 4, 5, 6 |
| 6935 | Snow Plow Relay Output Fault | 3, 4, 5, 6 |
| 6936 | Rear 2 Differential Lock Pressure Feedback Fault | 7 |
| 6937 | Rear 2 Differential Lock Solenoid Output Fault | 3, 4, 5, 6 |
| 6938 | Rear 1 Differential Lock Pressure Feedback Fault | 7 |
| J1939 SPNs for Bulkhead Module (BHM) SA 33 | ||
| SPN | Description | Possible FMI |
| 6939 | Rear 1 Differential Lock Solenoid Output Fault | 3, 4, 5, 6 |
| 6940 | Optional Feature Output Fault | 3, 4, 5, 6 |
| 6941 | Heated Mirrors Output Fault | 3, 4, 5, 6 |
| 6942 | Interaxle Pressure Feedback Fault | 7 |
| 6943 | Interaxle Solenoid Output Fault | 3, 4, 5, 6 |
| 6944 | Fuel Water Separator Heater Output Fault | 4, 5, 6 |
| 6945 | Front Differential Lock Pressure Feedback Fault | 7 |
| 6946 | Front Differential Lock Solenoid Output Fault | 3, 4, 5, 6 |
| 6947 | Fog Lamp Output Fault | 5, 6 |
| 6949 | Fire Pump Pressure Feedback Fault | 7 |
| 6950 | Fire Pump Solenoid Output Fault | 3, 4, 5, 6 |
| 6951 | Fifth Wheel Slide No Pressure Feedback | 7 |
| 6952 | Fifth Wheel Slide Unexpected Pressure Feedback | 7 |
| 6953 | Fifth Wheel Slide Solenoid Output Fault | 3, 4, 5, 6 |
| 6954 | End of Frame Air No Pressure Feedback | 7 |
| 6955 | End of Frame Air Unexpected Pressure Feedback | 7 |
| 6956 | End of Frame Air Solenoid Output Fault | 3, 4, 5, 6 |
| 6957 | Daytime Running Lights (DRL) Output Fault | 5, 6 |
| 6958 | Brake Line Air Dryer Output Fault | 3, 4, 5, 6 |
| 6959 | Axle Shift Pressure Feedback Fault | 7 |
| 6960 | Axle Shift Solenoid Output Fault | 3, 4, 5, 6 |
| 6961 | Axle Lift No Pressure Feedback | 7 |
| 6962 | Axle Lift Unexpected Pressure Feedback | 7 |
| 6963 | Axle Lift Solenoid Output Fault | 3, 4, 5, 6 |
| 6964 | Air Horn Solenoid Output Fault | 5, 6 |
| 6965 | BHM VBAT 5 Input Fault | 3, 4 |
| 6966 | BHM VBAT 4 Input Fault | 3, 4 |
| 6967 | BHM VBAT 3 Input Fault | 3, 4 |
| 6968 | BHM VBAT 2 Input Fault | 3, 4 |
| 6969 | BHM VBAT 1 Input Fault | 3, 4 |
| 6970 | Wiper High Output Fault | 5, 6 |
| 6971 | Wiper Low Output Fault | 5, 6 |
| 6972 | Multifunction Turn Signal Switch Wiper High Input Fault | 2 |
| 6973 | Multifunction Turn Signal Switch Wiper Low Input Fault | 2 |
| 6974 | Multifunction Turn Signal Switch Wiper On/Off Input Fault | 2 |
| 6975 | ICU3-M2 Wiper Park CAN Feedback Error | 2 |
| J1939 SPNs for Bulkhead Module (BHM) SA 33 | ||
| SPN | Description | Possible FMI |
| 6976 | Washer Pump Output Fault | 5, 6 |
| 6977 | Multifunction Turn Signal Switch Washer Switch Input Fault | 2 |
| 6978 | Multifunction Turn Signal Switch Right Turn Signal Input Fault | 2 |
| 6979 | Multifunction Turn Signal Switch Left Turn Signal Input Fault | 2 |
| 6980 | Right Stop Lamp Output Fault | 5, 6 |
| 6981 | Left Stop Lamp Output Fault | 5, 6 |
| 6982 | Wake Up Hardware Fault | 5, 6 |
| 6983 | Starter Relay (mag switch) Output Fault | 5, 6 |
| 6984 | Ignition System, Accessory Power Outputs Fault | 5, 6 |
| 6985 | Ignition System, Ignition Power Outputs Fault | 2, 5, 6 |
| 6986 | Ignition Switch Fault | 7 |
| 6987 | Taillights, Clearance Lights, License Plate Lights Output Fault | 5, 6 |
| 6988 | Left Low Beam Output Fault | 5, 6 |
| 6989 | Right Low Beam Output Fault | 5, 6 |
| 6990 | Left High Beam Output Fault | 5, 6 |
| 6991 | Right High Beam Output Fault | 5, 6 |
| 6992 | Multifunction Turn Signal Switch High Beam Input Fault | 2 |
| 6993 | Headlamp Switch Disagreement–Both park and on inputs are closed. | 7 |
| 6994 | ICU3-M2 Hazard Switch CAN Feedback Error | 19 |
| 6995 | Horn Output Fault | 3, 4, 5, 6 |
| 6996 | Dome Lamps Switched Power Output Fault | 5, 6 |
| 6997 | Cigar Lighter Output Fault | 3, 4, 5, 6 |
| 6998 | Dome Lamps Battery Power Output Fault | 5, 6 |
| 6999 | Backup Lamps/Alarm Output Fault | 5, 6 |
| 7000 | Panel Lamp Backlighting PWM Output Fault | 3, 4, 5, 6 |
| 524280 | Component ID Mismatch | 31 |
| 524281 | Application to Parameter Incompatibility | 31 |
| 524282 | Parameter Checksum Failure | 12 |
| 524283 | Application Checksum Failure | 12 |
| 524284 | Boot Block Checksum Failure | 12 |
| 524285 | Boot Hold Line is Active | 4 |
| 524286 | Ram Failure | 12 |
| Failure Mode Identifiers | ||
| FMI | J1939 Description | J1587 Description |
| 00 | Data valid but above normal operational range–Most severe level | Data valid but above normal operational range (engine overheating) |
| 01 | Data valid but below normal operational range–Most severe level | Data valid but below normal operational range (engine oil pressure too low) |
| 02 | Data erratic, intermittent, or incorrect | Data erratic, intermittent, or incorrect |
| 03 | Voltage above normal or shorted high | Voltage above normal or shorted high |
| 04 | Voltage below normal or shorted low | Voltage below normal or shorted low |
| 05 | Current below normal or open circuit | Current below normal or open circuit |
| 06 | Current above normal or grounded circuit | Current above normal or grounded circuit |
| 07 | Mechanical system not responding or out of adjustment | Mechanical system not responding properly |
| 08 | Abnormal frequency, pulse width, or period | Abnormal frequency, pulse width, or period |
| 09 | Abnormal update rate | Abnormal update rate |
| 10 | Abnormal rate of change | Abnormal rate of change |
| 11 | Root cause not known | Failure mode not identifiable |
| 12 | Bad intelligent device or component | Bad intelligent device or component |
| 13 | Out of Calibration | Out of Calibration |
| 14 | Special Instructions | Special Instructions |
| 15 | Data valid but above normal operational range–Least severe level | Reserved for future assignment by the SAE Subcommittee |
| 16 | Data valid but above normal operational range–Moderately severe level | — |
| 17 | Data valid but below normal operational range–Least severe level | — |
| 18 | Data valid but below normal operational range–Moderately severe level | — |
| 19 | Received network data in error | — |
| 31 | Condition Exists | — |
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Don 14/02/2021Hi, my name is Don, and I have a frustrating problem. (2006 Thomas Freightliner, 6.7L Cummins, Allison 2000 Transmission) will not crank. Noticed a “Range Inhibit” message illuminated on the upper left corner of the IP. Put a scanner on it, and retrieved three Active codes (Bulkhead Module – SID 37 FMI 2 – Missing Transmission CAN message – Data erratic, intermittent, or incorrect. Bulkhead Module – SPN 2003 FMI 19 – Missing Transmission CAN message – Received network data in error. Engine – 241 FMI N/A – Wheel-based vehicle speed – data erratic, or incorrect. The ECM lost the vehicle speed signal). I’ve tested every fuse, and relay. Inspected all wire harnesses, connections. Checked voltage on ignition wires to the bulkhead, and ohms on pins C & D on the bus interface connection. Swopped TCM, Bulkhead module, ignition switch, and starter, but no change.
Reply ↓
- DAN 21/09/2021
Did you figure issue out? Allison Transmissions World Headquarters in Indianapolis have great engineers who may be able to lead you through troubleshooting tree. Their 2000 series manuals are a great help.
It reads as though you tried basic approaches. Throwing parts at these types of issues are simply too expensive. Plus, switching out TCM’s can also ruin a good one if there’s circuit to circuit shorts in wiring harnesses.
Hope you had technical assistance …
Reply ↓
- James McElroy 28/02/2022
Hi my name James I own a 2005 m2 106 sport with a cat 7 motor and Allison Transmission My truck will not turn over and have plenty of battery voltage 12.8 volts when i turn the key all the gauges work but will not spin over i found a Sid- 22 code which the description for the code is Missing Smart Switch does anyone know what this is thanks James
Reply ↓
- emma 11/10/2022
Fault Codes
1
FAULT CODEFMIDESCRIPTIONFIRST DETECTEDLAST OBSERVEDTYPE
SPN-214Engine ECU Temperature (use SPN 1136)Oct 10, 5:21 PMOct 10, 5:42 PMIntermittent
SPN-69127Transmission Internal Component 2 SpeedOct 10, 5:21 PMOct 10, 5:21 PMIntermittent
SPN-3932351Oct 10, 5:21 PMOct 10, 5:21 PMIntermittent
PID-1681Battery Potential (Voltage)Oct 10, 5:21 PMOct 10, 5:21 PMIntermittent
PID-1581Battery Potential (Voltage)—SwitchedOct 10, 5:21 PMOct 10, 5:21 PMIntermittent
PID-1684Battery Potential (Voltage)Oct 10, 5:21 PMOct 10, 5:21 PMIntermittent
SPN-656142Oct 10, 11:51 AMOct 10, 11:51 AMIntermittent
what is all these codes are my truck dyingReply ↓
- Chase 23/10/2022
I have a 2015 m2 106 no active faults. 11.9 volts on the dash. When turning the key on I have power but get a long warning horn…instrument cluster will reset everything looks fine, but will not crank or start. Haven’t found a bad fuse and tried jumping it, but still nothing.
Reply ↓
Don 
DAN 
James McElroy 
emma 
Chase 