Scania ELC DTC 774 Control box 1

ELC Electronically controlled air suspension · Scania · 2 variants

Code 774 (decimal). Some diagnostic tools show it in hexadecimal as 0306.

In short

The voltage on the input from the control box has been too low.

Variant 1

Applies to: ELC3

What does Scania ELC fault code 774 mean?

The voltage on the input from the control box has been too low.

What causes Scania DTC 774?

This fault code is generated if the control box and/or cable harness has been shorted to ground.

How does the system react?

If the fault occurs there will be no standby function and level control using the control box. The yellow warning symbol is on when the fault is active. Note: On vehicles with blackout lighting (BOL) the fault code can be ignored. The fault code is activated on these vehicles since supply and earth to the operation unit are interrupted when the blackout lighting function is used.

How to fix Scania ELC fault code 774?

Check the cable harness for damage or forbidden connections and make sure the control box is intact.

Variant 2

Applies to: ELC3 (ELC3Rear)

Detection

The voltage on the input from the control box has been too low.

Possible cause

This fault code is generated if the control box and/or cable harness has been shorted to ground.

System reaction

If the fault occurs there will be no standby function and level control using the control box. The yellow warning symbol is on when the fault is active. Note: On vehicles with blackout lighting (BOL) the fault code can be ignored. The fault code is activated on these vehicles since supply and earth to the operation unit are interrupted when the blackout lighting function is used.

How to fix

Check the cable harness for damage or forbidden connections and make sure the control box is intact.

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

Code 774 in other Scania systems

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