Scania Truck logo

SCANIA Truck Coordinator COO Fault Codes

Code Title Fault Causes Notes Remedy

 

1

Cruise control

 

The voltage in the cruise control switch circuit is too high or too low.

 

Short circuit or open circuit. Cruise control switch malfunction possible.

 

While this DTC is active, cruise control and manual idle speed control are not possible.

 

Check the cruise control switch, including wiring and electrical connectors.

 

3

Radio controls

 

The voltage in the circuit located on the steering wheel radio control panel is either too high or too low.

 

Short circuit or open circuit. There may be a fault in the radio control panel located on the steering wheel.

 

While this DTC is active, radio control from the steering wheel panel is not possible.

 

Check the radio control panel located on the steering wheel, including the wires and connectors.

 

4

Communication with the engine control unit

 

Interruption of data exchange between the coordinator and the engine control unit.

 

The cause of the malfunction may be:

 

Open in CAN red circuit.

 

Short circuit or open circuit in the power supply of the engine control unit.

 

Failure of the control unit.

 

While there is a malfunction, some problems may arise when activating the power take-off unit, which is connected via the coordinator.

 

Check the wiring and electrical connectors of the red CAN bus. Check the engine control unit power supply circuit (30) and the engine control unit turn on signal circuit (15).

 

5

Contact with tachograph

 

Interruption of data exchange between coordinator and tachograph.

 

The cause of the malfunction may be:

 

Open in CAN yellow circuit.

 

Short circuit or open circuit of the tachograph power supply.

 

Internal fault in the tachograph.

 

 

Check the wiring and electrical connections for the yellow CAN bus. Check the tachograph power supply circuit (30) and the tachograph trigger signal circuit (15). In the instrument cluster you can see if any trouble code is generated by the tachograph.

 

6

Communication with the EBS control unit

 

Interruption of data exchange between the coordinator and the EBS control unit.

 

The cause of the malfunction may be:

 

Open in CAN red circuit.

 

Short circuit or open circuit in the power supply circuit of the EBS control unit.

 

Fault in the EBS control unit.

 

As long as the presence of a fault is confirmed (active fault), the brake warning light remains on. It is also possible that the activation of the engine brake retarder does not occur properly.

 

Check the wiring and electrical connectors of the red CAN bus. Check the EBS control unit power supply circuit (30) and the EBS control unit enable signal circuit (15).

 

7

Communication with the CUV control unit

 

The connection between the coordinator and the control unit of the CUV review system has been broken.

 

The cause of the malfunction may be:

 

Open in CAN yellow circuit.

 

Short circuit or open circuit in the CUV control unit power circuit.

 

CUV control unit malfunction.

 

While this fault code is active it will be impossible to determine whether a trailer is attached to the car or not.

 

Check the wiring and electrical connections for the yellow CAN bus. Check the CUV control unit power supply circuit (30) and the CUV control unit enable signal circuit (15). In the instrument cluster, you can see if any trouble code has been generated by the CUV control unit.

 

8

Link to instrument cluster

 

Interruption of data exchange between the coordinator and the instrument cluster.

 

The cause of the malfunction may be:

 

Open in CAN yellow circuit.

 

Short circuit or open circuit in the instrument cluster power supply.

 

Malfunction in the instrument cluster itself.

 

 

Check the wiring and electrical connections for the yellow CAN bus. Check the power supply of the instrument cluster (30) and the signal circuit for switching on the instrument cluster (15).

 

9

Ignition switch signals

 

Invalid combination of signals from the coordinator to the ignition lock. This fault code is set when the coordinator receives the on-network power-on signal in the absence of the ignition key finding signal in the lock.

 

Malfunction in the electric circuit of the ignition lock or internal malfunction in the ignition lock.

 

The inability to start the engine while there is a malfunction.

 

Check ignition lock, including connecting wires and connectors.

 

Measure the voltage on the "ignition key inserted" pin. When the ignition key is in the lock, the voltage must be equal to the battery voltage, that is, 24 V. When the key is removed, the voltage must be 0 V.

 

10

Check engine control unit

 

The coordinator was unable to verify the engine control unit. The engine control unit is perceived as faulty or not intended for use on this vehicle.

 

The engine control unit PIN is inconsistent with the coordinator PIN.


12

Ignition key test

 

Ignition key can not be tested.

 

Before issuing permission to start the engine, the immobilizer should receive confirmation from the coordinator about the use of a legal ignition key. The ignition key shown here is not legal.

 

The key does not have a built-in responder or the defendant is defective. However, it may be that the key ("key", "responder" and "remote control" in this case are identical) is "trained" under another coordinator, or the key identification process was interrupted due to the fact that multiple keys with responders.

 

A receiver malfunction can also cause a malfunction code to be written.

 

When this fault occurs, the immobilizer warning light flashes.

 

Make sure the correct ignition key is in the ignition switch. Check that there are no other keys with a built-in responder on the bundle of the regular ignition key. Check the transceiver and wiring.

 

13

Accelerator Pedal Position Sensor

 

The voltage in the accelerator pedal position sensor circuit was higher or lower than the allowed value. The accelerator pedal position sensor generates two separate output signals and the fault relates to the main output signal (output signal 1).

 

Short circuit or open circuit in the main output signal (output signal 1) of the accelerator pedal position sensor. It is also possible malfunction of the accelerator pedal position sensor.

 

While this DTC is active, the engine will not respond to an attempt to change the fuel supply.

 

Check the accelerator pedal sensor, including wiring and electrical connectors.

 

14

Accelerator Pedal Position Sensor

 

The voltage in the accelerator pedal position sensor circuit was higher or lower than the allowed value. The accelerator pedal position sensor generates two separate output signals and the fault relates to the backup output signal (output signal 2).

 

Short circuit or open circuit in the backup output signal circuit (output signal 2) of the accelerator pedal position sensor. It is also possible malfunction of the accelerator pedal position sensor.

 

While this DTC is active, the engine will not respond to an attempt to change the fuel supply.

 

Check the accelerator pedal sensor, including wiring and electrical connectors.

 

15

Accelerator Pedal Position Sensor

 

Two signals (main and backup) of the accelerator pedal position sensor are unreliable with respect to each other.

 

Short circuit or open circuit. It is also possible malfunction of the accelerator pedal position sensor.

 

While this DTC is active, the engine will not respond to an attempt to change the fuel supply.

 

Check the accelerator pedal sensor, including wiring and electrical connectors.

 

sixteen

Brake pedal sensor

 

The voltage in the brake pedal position sensor circuit was higher or lower than the permissible value. The brake pedal position sensor generates two separate output signals and the fault relates to the main output signal (output 1).

 

Short circuit or open circuit in the main output signal (output signal 1) of the brake pedal position sensor. It is also possible malfunction of the brake pedal position sensor.

 

As long as the presence of a fault is confirmed (active fault), the brake warning light remains on. It is also possible that the activation of the engine brake retarder does not occur properly.

 

Check the brake pedal sensor, including wiring and electrical connectors.

 

17

Brake pedal sensor

 

The voltage in the brake pedal position sensor circuit was higher or lower than the permissible value. The brake pedal position sensor generates two separate output signals and the fault refers to the backup output signal (output 2).

 

Short circuit or open circuit in the backup output signal circuit (output signal 2) of the brake pedal position sensor. There may also be an internal fault in the brake pedal sensor or a short circuit in the pressure switch / refrigerant pressure sensor T6 circuit.

 

As long as the presence of a fault is confirmed (active fault), the brake warning light remains on. It is also possible that the activation of the engine brake retarder does not occur properly.

 

Check the brake pedal sensor, including wiring and electrical connectors. Check the pressure switch or refrigerant pressure sensor T6, including the wiring and connectors.

 

18

Brake pedal sensor

 

Two signals (main and backup) of the brake pedal position sensor are unreliable with respect to each other.

 

Short circuit or open circuit. There may also be an internal fault in the brake pedal sensor or a short circuit in the pressure switch / refrigerant pressure sensor T6 circuit.

 

While the presence of a fault is confirmed (active fault).


19

Clutch pedal position sensor

 

Too high or too low voltage in the clutch pedal position sensor circuit.

 

A short or open circuit in the clutch pedal sensor circuit. In addition, there may be an internal fault in the clutch pedal sensor.

 

As long as this DTC is active there will be difficulty in shifting gears.

 

Check the clutch pedal sensor, including wiring and electrical connectors.

 

20

Red CAN bus

 

The data transfer via the red CAN bus was completely interrupted.

 

Short circuit in the red CAN bus.

 

As long as this DTC is active, none of the functions associated with the red CAN bus can be implemented.

 

Check the wiring and electrical connectors of the red CAN bus.

 

21

Yellow CAN bus

 

The data transmission on the yellow CAN bus was completely interrupted.

 

Short circuit in yellow CAN bus.

 

While this fault code is active, none of the functions associated with the yellow CAN bus can be implemented.

 

Check the wiring and electrical connections for the yellow CAN bus.

 

22

Green CAN bus

 

Data transmission over the green CAN bus was completely interrupted.

 

Short circuit in green CAN bus.

 

As long as this DTC is active, none of the functions associated with the green CAN bus can be implemented.

 

Check the wiring and electrical connections for the green CAN bus.

 

23

Pedal positions

 

The signals from the accelerator position sensor and from the brake pedal position sensor are unreliable with respect to each other.

 

At the same time, the accelerator and brake pedals were pressed. This can happen due to jamming of the accelerator pedal or due to breakage of the return spring. In exceptional cases, the appearance of a DTC may be caused by a fault in the wiring or an internal fault in the sensor.

 

As long as this fault exists, there is a possibility that the engine will not return to idle speed with the accelerator pedal released.

 

First of all, you need to check that the accelerator pedal released corresponds to the idle position (no signal from the external engine load). Then check that there is no brake signal when the brake pedal is released.

 

If necessary, check both pedal position sensors and related wiring, including connectors.

 

24

Fuel level

 

Too high or too low voltage in the fuel level sensor circuit.

 

Short circuit or open circuit. Possible fuel level sensor malfunction.

 

As long as this fault exists, the fuel gauge will indicate that the tank is empty.

 

Check the condition of the fuel level sensor, including the connecting wires and connectors. Check also the mechanical part of the sensor.

 

25

Speed control function during descent

 

The voltage in the circuit of the speed control switch during descent is above or below normal.

 

Short circuit or open circuit. There may be a malfunction of the speed control switch during descent.

 

As long as this fault exists, the speed control system cannot be enabled during descent.

 

Check the speed control switch during descent, including wiring and electrical connectors.

 

26

Coordinator

 

Incorrect or unreliable data.

 

Internal fault in the coordinator.

 

As long as a malfunction is present, malfunctions can occur in the Opticruise system.

 

Clear the trouble code memory, then turn off and turn on the ignition with the key. After that, check if this DTC is generated again. If so, replace the coordinator.

 

27

Ignition switch signals

 

The start signal (50) from the ignition lock to the coordinator was too long. A fault code is generated if the duration of the start signal has exceeded five minutes.

 

Malfunction in the ignition switch or starter relay.

 

As long as this fault exists, the coordinator will send repeated engine start requests to the engine control unit.

 

Check the ignition switch and starter relay.