Fault code: 4707 SCANIA

Error identification:

The driver stage for the solenoid valve warns of a fault.

Cause:

The fault can be due to a short circuit in the electrical cables, solenoid valve or internally in the control unit.

Notes:

The control unit attempts to get the engine to continue using the faulty cylinder as long as possible. Certain types of short circuits can affect multiple cylinders. Fault codes will be generated for those cylinders affected by the short circuit. However, there may be instances where another cylinder is short circuited without generating any fault codes.

If fault codes are generated for more than one cylinder, maximum engine torque will be reduced by approx. 30%.

Action:

Check the circuit components, harness-to-harness connectors and electrical cables.

Check the resistance of the solenoid valve. Resistance should be 0.4 – 0.6 ohms. Also check the resistance between the solenoid valve connection and the engine. If the resistance is below 100 ohms, there is probably a short circuit.

Clear the fault code memory.

If the fault remains, first renew the unit injector and if necessary the control unit.