Allison WTEC II Fault Code: 23 PID: SPN: 12 FMI: Primary Shift Selector or RSI Link Fault
Main code 23 indicates a fault with a shift selector or the wiring between a shift selector and the ECU.
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Allison WTEC II Fault Code: 23 PID: SPN: 13 FMI: Primary Shift Selector Mode Function Fault
Main code 23 indicates a fault with a shift selector or the wiring between a shift selector and the ECU.
Allison WTEC II Fault Code: 23 PID: SPN: 14 FMI: Secondary Shift Selector or RSI Link Fault
Main code 23 indicates a fault with a shift selector or the wiring between a shift selector and the ECU.
Allison WTEC II Fault Code: 23 PID: SPN: 15 FMI: Secondary Shift Selector Mode Function Fault
Main code 23 indicates a fault with a shift selector or the wiring between a shift selector and the ECU.
Allison WTEC II Fault Code: 24 PID: SPN: 12 FMI: Sump fluid temperature, cold
Main code 24 indicates the ECU has detected either a high or low fluid temperature in the transmission sump (via the sump temperature sensor in the internal harness). All shifts are inhibited when Code 24 12 is set (only Neutral range operation is allowed). A related code is 33 12 which indicates a temperature reading outside the usable range of the sensor and indicates a probable sensor failure.
Allison WTEC II Fault Code: 24 PID: SPN: 23 FMI: Sump fluid temperature, hot
Main code 24 indicates the ECU has detected either a high or low fluid temperature in the transmission sump (via the sump temperature sensor in the internal harness). No upshifts are allowed above a calibration range when Code 24 23 is set. A related code is 33 12 which indicates a temperature reading outside the usable range of the sensor and indicates a probable sensor failure.
Allison WTEC II Fault Code: 25 PID: SPN: 00 FMI: Output speed sensor detected at 0 output rpm, Low
Main code 25 occurs if the output speed sensor reports a zero speed reading while both engine and turbine speeds are approximately equal, turbine speed is above a calibration value, and neutral is not selected or commanded.
Possible Causes:
1. Output speed sensor has failed
2. The required oncoming clutch or clutches did not come on.
Allison WTEC II Fault Code: 25 PID: SPN: 11 FMI: Output speed sensor, detected at 0 output rpm, 1st
Main code 25 occurs if the output speed sensor reports a zero speed reading while both engine and turbine speeds are approximately equal, turbine speed is above a calibration value, and neutral is not selected or commanded.
Possible Causes:
1. Output speed sensor has failed
2. The required oncoming clutch or clutches did not come on.
Code 25 11 can be generated by a false turbine speed reading. This may be due to crosstalk between solenoid and turbine speed sensor circuits caused by direct wire-to-wire short or by water in the electrical connectors.
Allison WTEC II Fault Code: 25 PID: SPN: 22 FMI: Output speed sensor, detected at 0 output rpm, 2nd
Main code 25 occurs if the output speed sensor reports a zero speed reading while both engine and turbine speeds are approximately equal, turbine speed is above a calibration value, and neutral is not selected or commanded.
Possible Causes:
1. Output speed sensor has failed
2. The required oncoming clutch or clutches did not come on.
Allison WTEC II Fault Code: 25 PID: SPN: 33 FMI: Output speed sensor, detected at 0 output rpm, 3rd
Main code 25 occurs if the output speed sensor reports a zero speed reading while both engine and turbine speeds are approximately equal, turbine speed is above a calibration value, and neutral is not selected or commanded.
Possible Causes:
1. Output speed sensor has failed
2. The required oncoming clutch or clutches did not come on.