Scania truck auxiliary heater system combustion air fan motor ATA 131-134 trouble repair guide.
Related Contents:
2024.07 Scania SDP3 V2.61.2 V2.40 Diagnostic Software Free Download
2023 2018 Scania Multi EPC Parts Catalogue Free Download
Scania VCI3 Diagnostic Adapter Full Chips
Procedures:
ATA 131
Combustion air fan motor
Error identification
The auxiliary heater does not start.
Cause
Interruption in the combustion air fan motor circuit.
Notes
Important! 18 V combustion air fan motor! The combustion air fan motor must not be connected directly to + 24 V.
Action
Check the combustion air fan motor. See the Internal electrical diagram under Connections. Measurement points 1 and 2 in harness-to-harness connector A for the control unit.
Resistance:
Approximately 4 ohms.
If necessary, renew the control unit.
ATA 132
Combustion air fan motor
Error identification
The auxiliary heater does not start.
Cause
Short circuit in the combustion air fan motor circuit.
Notes
Important! 18 V combustion air fan motor! The combustion air fan motor must not be connected directly to + 24 V.
Action
Check the combustion air fan motor. See the Internal wiring diagram under Connections. Measurement points 1 and 2 in connector A for the control unit.
Resistance:
Approximately 4 ohms.
ATA 133
Error identification
The fan wheel for the combustion air fan motor is not moving.
Cause
The fan wheel is blocked, the fan wheel is turning too quickly, or the magnet is missing from the fan wheel.
Notes
Action
Check that the magnet is on the fan wheel.
Check that the fan wheel is not jammed.
Check the combustion air fan motor. See the Internal electrical diagram under Connections. Measurement points 1 and 2 in harness-to-harness connector A for the control unit.
Resistance:
Approximately 4 ohms.
If necessary, renew the control unit.
ATA 134
Error identification
Short circuit or overloading on the auxiliary heater combustion air fan motor.
Cause
Electrical or mechanical fault in the auxiliary heater combustion air fan motor. Voltage supplied too high or fault on the control unit.
Notes
Important! If the voltage exceeds 18 V, there is a risk that the heater will be damaged.
Action
Check the auxiliary heater cable harness for signs of short circuits.
Check the function and condition of the auxiliary heater combustion air fan motor.
Check the control unit.
For more information about Scania truck,please refer to:Scania Trouble Repair.
This instruction show you guide on how to solve Doosan G2 Stage V machine P00BE…
New improved oil cooler pipes have been introduced on 6 cylinder Phaser/1000 Series engines. The…
This instruction show you guide on how to perform Paccar EPA10 to EPA13 MX Engine…
Here is the instruction show you guide on how to solve Fendt 1100MT Tractor trouble…
Here is the simple guide on how to perform cylinder leak-down test for Detroit GHG17…
Vehicles: Montana 1.8, Celta 1.4 and Corsa 1.0. Main components 1 Nozzles / Canister…