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.
A buzzing sound should be heard from the heater.
Check the function of the heater. See Engine coolant heater, test running Engine Coolant Heater, Test Running.
Other information:
- For a description of parameters, see Description of parameters Description of Parameters
- For a description of activations, see Activating components/functions Activating Components/Functions.
Does the heater operate?
Yes - Intermittent fault
No - Checking the connector
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Checking the connector
- Ignition off
- Check the control module connector for contact resistance and oxidation. Remedy if necessary.
Check for damage carefully
- 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.
A buzzing sound should be heard from the heater.
Check the function of the heater. See Engine coolant heater, test running Engine Coolant Heater, Test Running.
If the heater now functions, the cause of the fault was loose connections in the connector.
Other information:
- To access the control module or connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- Checking wiring and terminals Checking Wiring And Terminals.
Does the heater operate?
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. Use the smart tool.
Warning! Do not activate the fuel pump (FP) for longer than a few seconds.
Check the circuit between control module 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:
- To access the control module or connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access or replace the water pump, see Water pump engine coolant heater, replacing Service and Repair
- To access or replace the fuel pump (FP), see Fuel pump auxiliary heater, replacing Service and Repair
- To access or replace combustion fan see Fuel injection nozzle / fan motor / pressure equalizer, replacing Fuel Injection Nozzle / Fan Motor / Pressure Equalizer, Replacing
- For other values, see Signal specification Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Verification
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Verification
Verification
Verification
Hint: After the repair it is necessary to check that the fault has been rectified.
- Ignition off.
- Connect connector, install components etc.
- Ignition on.
Note! It is important that only the ignition is on for the heater to start up.
- Activate the heater.
A buzzing sound should be heard from the heater.
Check the function of the heater as described in Engine coolant heater, test running Engine Coolant Heater, Test Running.
Additional information:
- For a description of the parameters, see Description of parameters Description of Parameters.
- For a description of activations, see Activating components/functions Activating Components/Functions.
Does the heater work?
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 control module connector. Check for loose connections. Check for contact resistance and oxidation.
Check the circuit between control module 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:
- To access the control module or connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access or replace the water pump, see Water pump engine coolant heater, replacing Service and Repair
- To access or replace the fuel pump (FP), see Fuel pump auxiliary heater, replacing Service and Repair
- To access or replace combustion fan see Fuel injection nozzle / fan motor / pressure equalizer, replacing Fuel Injection Nozzle / Fan Motor / Pressure Equalizer, Replacing
- For other values, see Signal specification Signal Specification
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Fault-tracing information
DONE
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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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