Scania ATA DTC 109 ADR

ATA ATA control unit · Scania

Code 109 (decimal). Some diagnostic tools show it in hexadecimal as 006D.

In short

Auxiliary heater switched off.

Applies to: ATA1ATA2

What does Scania ATA fault code 109 mean?

Auxiliary heater switched off.

What causes Scania DTC 109?

Auxiliary heater switched off due to ADR

How does the system react?

On vehicles without ADR, pin H13-6 should be earthed via connector C218-8. On ADR vehicles, the heater is switched off if the engine speed is below 50 rpm or if the voltage on pin H13-4 exceeds 15 V

How to fix Scania ATA fault code 109?

Check the cable harness and control unit.

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

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