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The J1939 data lines consist of an expandable data bus allowing the addition of accessory control modules. The J1939 data lines are the primary data bus. Data is prioritized and then transmitted across the J1939 data lines to the appropriate control module.
Conditions for diagnostic trouble code (DTC):
1) CAN communication does not work
Observable symptoms
1) An electronic control unit (ECU) lacking communication with other ECUs can cause a number of symptoms
Probable cause
1) Internal fault in electronic control unit (ECU)
2) Connector
3) Data link
Detailed information
1) Faults on the datalink can be localised by combining this diagnostic trouble code (DTC) with other DTCs
Related products
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Allison 1000 & 2000 Gen 5 Fault Code:P1892 Throttle Position Sensor (TPS) PWM Signal – High Input
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P097C Shift Solenoid 3 (SS3) Control Circuit – Open
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2641 Torque Management Feedback Signal – LRTP
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2685 Actuator Supply Circuit Voltage 3 Low (HSD3)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:U0073 CAN Communication Bus 1 Off
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2686 Actuator Supply Circuit Voltage 3 High (HSD3)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2671 Actuator Supply Voltage 2 (HSD2) – High (Batt)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2684 Actuator Supply Circuit Voltage 3 Open (HSD3)
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P1891 Throttle Position Sensor (TPS) PWM Signal – Low Input
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2727 Pressure Control Solenoid 1 (PCS1) Control Circuit – Open
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P2670 Actuator Supply Voltage 2 (HSD2) – Low
1000 & 2000 Gen 5Rated 0 out of 5 -
Allison 1000 & 2000 Gen 5 Fault Code:P0979 Shift Solenoid 3 (SS3) Control Circuit – Low
1000 & 2000 Gen 5Rated 0 out of 5
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Detroit DD13 GHG14 (2014-16) Fault Code: SPN 3216 FMI 21 (MCM) Selective Catalyst Reduction (SCR) Inlet NOx Sensor – Drift (Low Box)
DD13 GHG14 (2014-16)Rated 0 out of 5 -
Detroit DD13 EPA07 (2007-09) Fault Code: SPN 411 FMI 1 (MCM) Exhaust Gas Recirculation Delta P Pressure is Too Low at Low Speeds and Loads
DD13 EPA07 (2007-09)Rated 0 out of 5 -
PACCAR MX (2004 Emissions) Fault Code: P1214 Injector Solenoid Valve Cylinder 6 – Short Circuit Between ECU (D420) Pin (A7) and Pin (A8)
MX (2004 Emissions)Rated 0 out of 5 -
PACCAR MX (2004 Emissions) Fault Code: P1050 Exhaust Gas Pressure After BPV – Data Erratic, Intermittent or Incorrect
MX (2004 Emissions)Rated 0 out of 5 -
Detroit DD13 EPA10 (2010-13) Fault Code: SPN 3242 FMI 20 (ACM) Diesel Oxidation Catalyst Temperature Drift – Inlet High or Outlet Low
DD13 EPA10 (2010-13)Rated 0 out of 5 -
CAT 3406E (Prefix 1MM or 2WS) Fault Code: 00 PID: SPN: 171 FMI: 11 Ambient Air Temperature Data Lost
3406E (Prefix 1MM or 2WS)Rated 0 out of 5