Fault Code Guide

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
Bulkhead Module 54.12
Bulkhead Module Fault Code Information
Business Class M2 Workshop Manual, Supplement 22, September 2012410/6