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Doosan 110 forklift showing Faulty code D4

Pavazhira ยท 2020-07-27 13:56

I have a 110 doosan forrklift which was sometimes disengaging from gears to neutral nd it was showing "D4 "faulty and i found out that it was the Alternator which was overcharging .31volts at idling. Then the transmission Ecm shuts down and put the transmission in neutral position. Now i fixed the alternator the problem is solved but now i need some schooling on this alternator to transmission ecm . How do they link

Replies4
  1. #1Bigbert2020-08-13 06:57

    Which brand and type of transmission is fitted?

  2. #2Pavazhira2020-08-13 14:34

    Doosan D110S-5 forklift fitted with 3WG-161 Zf transmission

  3. #3Bigbert2020-08-13 15:16

    Hi Pavazhira, so quite simple. To prevent TCU from longterm overvoltage its is detecting this state from, guess, some above 32 V and switches to neutral, even will do a complete shutdown. There is no further direct link to alternator, but presumably to engine via CAN.

  4. #4Pavazhira2020-08-14 07:25

    Oh ! noted with thanks