Missing
Missing
Checking the power supply
- Ignition on.
Note! It is important that only the ignition is on in order for the heater to start.
- Activate the heater.
Listen for a buzzing sound which indicates that the heater is running.
Check the heater function.
Other information:
- Engine coolant heater, test running Component Tests and General Diagnostics
Is the heater working?
Yes - Intermittent fault
No - Checking the connector
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Checking the connector
- Ignition off
- Check the control module connector. Check for contact resistance and oxidation. Remedy if necessary.
In particular, check for any damage
- Reinstall the components, reconnect the connectors etc.
- Ignition on.
Note! It is important that only the ignition is on in order for the heater to start.
- Activate the heater.
Listen for a buzzing sound which indicates that the heater is running.
Check the heater function.
If the heater now functions, the cause of the fault was loose connections in the connector.
Other information:
- Connecting the breakout box Connecting the Breakout Box
- Engine coolant heater, test running Component Tests and General Diagnostics
- Checking wiring and terminals Checking Wiring And Terminals
Is the heater working?
Yes - Fault Found
No - Checking the supply circuit
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Checking the supply circuit
- Ignition on.
There is a common power supply for the water pump, fuel pump (FP) and combustion fan. It is easier to locate the fault if the components are activated one at a time.
Activate the water pump, fuel pump (FP) and combustion fan.
Warning! Do not activate the fuel pump (FP) for longer than a few seconds.
Check the circuit between combustion preheater module (CPM) terminal #11 and the components which are connected to the supply circuit (water pump terminal 2, fuel pump (FP) terminal 2 and combustion fan supply terminal). Check for an open-circuit. Check for a short-circuit to ground.
Remedy as necessary.
Other information:
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Specification
- Water pump engine coolant heater, replacing Service and Repair
- Fuel pump auxiliary heater, replacing Service and Repair
- Fuel injection nozzle / fan motor / pressure equalizer, replacing Fuel Injection Nozzle / Fan Motor / Pressure Equalizer, Replacing
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Read off the engine coolant temperature.
Note! It is important that only the ignition is on in order for the heater to start.
- Activate the heater.
Hint: After repair, the voltage of the flame sensor can be checked. The voltage must be a maximum of 1.0 V.
Check the heater function.
Caution! In order for to enable start of the heater itself, the battery voltage must be normal, coolant temperature must be lower than +96 °C and the heater's after-run/stop sequence must be finished. There must also be enough fuel in the tank.
Caution! If the heater or other components are not activated, try closing down the activation window and then starting the activation again with the symbol for VCT2000.
Other information:
- Engine coolant heater, test running Component Tests and General Diagnostics.
Is the heater working?
Yes - VERIFIED
No - VERIFICATION FAILEDPAPER
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
PAPER - No Fault Found
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - FAULT-TRACING FAILED
Attempt New Test - Checking the power supply
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Intermittent fault
Check the combustion preheater module (CPM) connectors. Check for loose connections. Check for contact resistance and oxidation.
Check the circuit between combustion preheater module (CPM) terminal #11 and the components which are connected to the supply circuit (water pump terminal 2, fuel pump (FP) terminal 1 and combustion fan supply terminal). Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground.
Remedy as necessary.
Other information:
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Specification
- Water pump engine coolant heater, replacing Service and Repair
- Fuel pump auxiliary heater, replacing Service and Repair
- Fuel injection nozzle / fan motor / pressure equalizer, replacing Fuel Injection Nozzle / Fan Motor / Pressure Equalizer, Replacing
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - Fault Found
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Attempt New Test - Checking the power supply
DONE - DONE
FAULT FOUND - Fault Found
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