Scania fault code 1843
Code 1843 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
MBS
MBS expansion unit C, power supply pin group V3, current above limit value
MBS expansion unit C, current to the pin for power supply pin group V3 has exceeded the limit value of 20 A for more than 5 seconds.
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ALLISON Allison automatic gearbox
Incorrect gear ratio on 3rd gear
Actual 3rd gear ratio does not agree with the calculated 3rd gear ratio. Gear ratio is determined on the basis of turbine speed and output shaft speed. This measured gear ratio is…
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CID
Voltage feed
Too high a supply voltage to the interactive centre information display detected.
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DD
Voltage feed
Too high a voltage supply to the interactive driver display detected.
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