Applies to: ACC1
What does Scania ACC fault code 18 mean?
The battery voltage is too high or too low.
What causes Scania DTC 18?
Fault on the power supply.
How does the system react?
The following components are switched off if the voltage level is too high or too low: - Air control motor: 18 V > - > 30 V - Water valve: 18 V > - > 30 V - Recirculation motor: 18 V > - > 34 V - Control unit fan: 18 V > - > 34 V - Fan motor: 21.5 V > - > 30 V - LCD display: > 34 V - Lighting up/down: > 34 V - Lighting panel: > 34 V - All status LEDs: > 34 V - Auxiliary heater output signal: 18 V > - > 34 V
How to fix Scania ACC fault code 18?
- Check the wiring and the harness-to-component connector.
- Check the voltage level using SDP3.
- Check the power supply.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.
Code 18 in other Scania systems
- 18hex 0012 Communication with the BMS control unit
- 18hex 0012 Communication with the tachograph (TCO)
- 18hex 0012 Wheel speed
- 18hex 0012 No CAN message
- 18hex 0012 Brake pedal sensor
- 18hex 0012 CAN bus
- 18hex 0012 No CAN message
- 18hex 0012 High supply voltage
- 18hex 0012 Engine shutdown due to too high temperatures in the aftertreatment system.
- 18hex 0012 Engine shutdown due to too high temperatures in the aftertreatment system.
- 18hex 0012 Engine shutdown due to too high temperatures in the aftertreatment system.
- 18hex 000012 The temperature in the exhaust gas aftertreatment system is too high
- 18hex 0012 Extra sensor 1
- 18hex 0012 Rotational speed sensor
- 18hex 0012 Headlamp wiper and washer