Scania MGU DTC 8704 Sensor supply voltage, prohibited value

MGU MGU control unit · Scania

Code 8704 (decimal). Some diagnostic tools show it in hexadecimal as 2200.

In short

The voltage supply to the sensor has an incorrect value.

Applies to: MGU2MGU2 (MGU2X)MGU2 (MGUC2)MGU2 (MGUC2X)

What does Scania MGU fault code 8704 mean?

The voltage supply to the sensor has an incorrect value.

What causes Scania DTC 8704?

- Fault in the supply voltage to the sensor. - Open circuit. - Fault in the supply voltage within the sensor. - Incorrect type of sensor connected.

How does the system react?

The inverter will be turned off.

What are the symptoms?

Occurs together with fault code 1200.

How to fix Scania MGU fault code 8704?

  1. Check the cable harnesses and harness-to-component connectors between the MGU control unit and resolver.
  2. Check the supply voltage and current strength.
  3. Check for short circuits between the sensor voltage supply and earth cables.
  4. Renew the resolver.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 8704 in other Scania systems

Compare code 8704 in every system →