Faulty Signal

Faulty signal

Checking the function of the glow plug




- Ignition on.

Note! It is important that only the ignition is on in order for the heater to start.

- Activate the heater.
Check the heater function.

Other information
- Engine coolant heater, test running Component Tests and General Diagnostics





Is the heater working?

Yes - Checking components and wiring

No - Checking components and wiring

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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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VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

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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 function of the glow plug

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Checking components and wiring
Check the electrical terminal for the glow plug and the combustion preheater module (CPM) connector. Check for contact resistance and oxidation. Check for damage in particular.
Check the cable between combustion preheater module (CPM) terminal #1 and the glow plug terminal. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
With the ignition on and the glow plug electrical terminal disconnected, the voltage between the glow plug electrical terminal (control module side) and ground must be approximately 9 V.
Replace the glow plug if no fault is found in the cable.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Specification
- Glow plug engine coolant heater, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals










Continue - Verification

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Checking components and wiring
Check the electrical terminal for the glow plug and the combustion preheater module (CPM) connector. Check for contact resistance and oxidation. Check for loose connections.
Check the cable between combustion preheater module (CPM) terminal #1 and the glow plug terminal. Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground. Check for an intermittent short-circuit to supply voltage.
With the ignition on and the glow plug electrical terminal disconnected, the voltage between the glow plug electrical terminal (control module side) and ground must be approximately 9 V.
Remedy as necessary.

Other information
- Connecting the breakout box Connecting the Breakout Box
- Signal specification Signal Specification
- Glow plug engine coolant heater, replacing Service and Repair
- Checking wiring and terminals Checking Wiring And Terminals









Continue - Verification

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