Mercedes Benz Siemens FTC (722.7) Repair - TCUs

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Mercedes Benz Siemens FTC (722.7) - TCUs repair

Common problems

  • Multiple Gear change errors errors
  • P1840 - Valve Y3/7Y1 - PWM Solenoid valve 1/4 shift
  • P1841 - Valve Y3/7Y2 - PWM Solenoid valve 3 shift
  • P1842 - Valve Y3/7Y3 - PWM Solenoid valve 2/5/R shift
  • P1843 - Valve Y3/7Y4 - PWM Solenoid valve Torque converter lock up clutch
  • P1850 - Y3/7N1 - Transmission RPM sensor
  • P1858 - Y3/7S1 - Starter lock-out contact

Is your complaint not listed? Please contact our customer service

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How we work

We remanufacture the part you send. Prices are exclusive of VAT and possible shipping costs. Offer only applies to garages and dealers and not to individuals.

Can be remanufactured

OBDII Description
P1840 (2120) PWM solenoid valve 1 / 4 shift
P1841 (2121) PWM solenoid valve 3 shift
P1842 (2122) PWM solenoid valve 2 / 5 / R shift
P1843 PWM solenoid valve torque convertor lockup clutch
P1844 PWM shift valve circuit
P1850 (2204) Transmission RPM sensor Y3/7n1
P1858 (2227) Starter lockout contact
P1897 Control module N15/7 faulty
P1903 Control module N15/7 faulty

Remanufacture may be possible

OBDII Description
P1895 (200a) Internal fault in control unit

This error code will never actually appear independently. Therefore, look carefully at the rest of the error codes to make the correct diagnosis.

P1709 Park / Neutral switch
P1756 Selector lever implausible
P1872 CAN signal from gear regognition module faulty
P1875 CAN communication ESP
P2031 No signal or error signal from control unit N15/5
P2210 Selector lever coding is invalid
P2211 The selector lever is in an intermediate position
P2212 The selector lever position is implausible
P2318 Fault in CAN communication with control unit N15/5
P2333 The CAN signal from control unit N15/5
P2338 The CAN signal from control unit N15/5
2310 CAN communication with TCS failed
2311 CAN communication with ECU failed
2312 CAN communication with ECU failed
2315 CAN communication with instruments failed
2316 CAN communication with A/C failed
P240C The CAN signal for the selector lever position from control unit N15/5

These error codes may indicate that the gear selector lever is defective. In many cases, this is also revisable.

If in doubt, please contact our Customer Service.

Cannot be remanufactured

OBDII Description
P1884 (2123) PWM shift valve pressure
P1886 1-4 / -3 downshift PWM valve pressure too low OR 2-5 pressure too high
P1887 (2531) 1-4 or 2-5 shift slide valve jamming in basic position Shift valve pressure to low
P1888 1-4 or 2-5 shift slide valve jamming in basic position Shift valve pressure too high
P1889 2-5-R downshift PWM valve pressure too low Transmission slipping
P1893 Pressure too high at regulating valve or solenoid valve 1 / 4 or 3

These error codes often indicate mechanical defects. Check the gearbox carefully for wear and/or damage!

1. Log in or create an account

ACTRONICS works exclusively with car companies, brand dealers and specialists. You need an ACTRONICS account to place an order. Our customer service will assess whether your account is approved based on the information you have entered.

2. Find your part and create an order

Select your vehicle at the top of this page and choose the part number that you can read on the part. Can't read the OE number? Then select the option "OE number is not in the list" on this page. Can't find the part? Then request a quote.

3. Enter your diagnostic information and order details

When you register a revision order, we ask for more information about your diagnosis, such as your observations and/or an error code. This helps us to carry out the revision. After this, you choose your shipping and payment preference and start the order.

4. Packing & shipping

Make sure the part is securely packed so that it is not damaged during transport. Have you chosen our pick-up service? Then we will ensure that the part is picked up from you. This happens on working days (between 08:00 and 18:00) often within a few hours. Have you chosen to ship it yourself? Then bring the package to a parcel point near you. In both cases, you will receive instructions from our customer service.

5. We test the part

We test and inspect your part as soon as it arrives with us. Then we start the revision. Sometimes our test shows something different than the diagnostic information. In that case, we will contact you and share our findings and diagnosis. We only charge test costs for this and no revision costs.

6. We revise the part

Our specialists revise your part. You will receive updates so that you are always aware of the status of your order. If your part has successfully passed our final test, we will ship it to you. If necessary, we will provide additional workshop instructions and tips.