Main code 35 indicates the ECU has detected a complete power loss before the ignition was turned off.When this happens, the ECU is not able to save the current operating parameters in memory before turning itself off. Power interruption. (Not an active code; only appears after power is restored.) During power interruption, DNS light is not illuminated and the transmission will not shift. Allison WTEC II Fault Code: 34 PID: SPN: 16 FMI: EEPROM, Real Time Block Checksum Allison WTEC II Fault Code: 34 PID: SPN: 15 FMI: EEPROM, Diagnostic Queue Block Checksum Allison WTEC II Fault Code: 34 PID:...

Main code 35 indicates the ECU has detected a complete power loss before the ignition was turned off. When this happens, the ECU is not able to save the current operating parameters in memory before turning itself off. Real-time EEPROM write interruption. (Power interruption at the same time the ECU is recording a critical code to the real-time section of the EEPROM.) Allison WTEC II Fault Code: 35 PID: SPN: 00 FMI: Power interruption (Code set after power restored) Allison WTEC II Fault Code: 34 PID: SPN: 16 FMI: EEPROM, Real Time Block Checksum Allison WTEC II Fault Code: 34...

Main code 36 indicates the system has detected a mismatch between the ECU hardware and the ECU EPROM software or that there is a TransID (TID) problem. Allison WTEC II Fault Code: 35 PID: SPN: 16 FMI: Real Time EEPROM Write Interruption Allison WTEC II Fault Code: 35 PID: SPN: 00 FMI: Power interruption (Code set after power restored) Allison WTEC II Fault Code: 34 PID: SPN: 16 FMI: EEPROM, Real Time Block Checksum Allison WTEC II Fault Code: 34 PID: SPN: 15 FMI: EEPROM, Diagnostic Queue Block Checksum Allison WTEC II Fault Code: 34 PID: SPN: 14 FMI: EEPROM,...

Main code 41 indicates the ECU has detected either an open circuit or a short-to-ground in a solenoid or the solenoid wiring. The DO NOT SHIFT response is activated when this code is detected and all solenoids are turned off. Neutral start is inoperable; all display segments are on if the code is logged during ECU initialization (ignition on). Allison WTEC II Fault Code: 36 PID: SPN: 00 FMI: Mismatch between ECU hardware and software Allison WTEC II Fault Code: 35 PID: SPN: 16 FMI: Real Time EEPROM Write Interruption Allison WTEC II Fault Code: 35 PID: SPN: 00 FMI:...

Main code 41 indicates the ECU has detected either an open circuit or a short-to-ground in a solenoid or the solenoid wiring. The DO NOT SHIFT response is activated when this code is detected and all solenoids are turned off. Neutral start is inoperable; all display segments are on if the code is logged during ECU initialization (ignition on). Allison WTEC II Fault Code: 41 PID: SPN: 12 FMI: Open or short-to-ground, A solenoid circuit Allison WTEC II Fault Code: 36 PID: SPN: 00 FMI: Mismatch between ECU hardware and software Allison WTEC II Fault Code: 35 PID: SPN: 16...