Check Error Code ALLISON Transmission 4700RDS (Road Engine) using Shift Selector Display

To read Diagnostic Codes in the Digital Display:

Diagnostic codes will appear two characters at a time on a pushbutton or Select/ Monitor Display,
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Using a pushbutton selector, press the UP and DOWN arrows 2 times,
the Code Position (d1) is the first item displayed, followed by the Diagnostic Trouble Code (DTC), ** P, 07, 22. Each item is displayed for about one second, the display cycles continuously until the next code list position is accessed by pressing the MODE button. 



To CLEAR Diagnostic Codes:

• Press and Hold the MODE button for 10 seconds to clear both active and inactive codes.

Troubleshooting:
DTC P0721/ P0722 Output Speed Sensor Circuit Performance/ No Signal


Read More:
Solenoid Test on ALLISON Transmission using ALLISON DOC Software
Double Cat-Eyes on Shift Selector Display - ALLISON 4700 OFS Transmission







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