Checking the Hall Sensor

Checking the Hall sensor

Checking diagnostic trouble codes (DTCs)




If the malfunction is intermittent, it means that the malfunction has been registered at an earlier time but the malfunction no longer remains. Intermittent faults can occur for a number of different reasons. The fault is evaluated depending on how it occurs.
Check if the fault is permanent or intermittent.
Click on the VCT2000 symbol to read off the diagnostic trouble codes (DTCs).





Is the fault intermittent?

Yes - Troubleshooting procedure complete

No - Checking the Hall sensor

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Verification

Hint: After carrying out the repair, check that the fault has been remedied.

- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Check that the control of the roof is working in both directions.

Does operation of the roof work?

Yes - FAULT FOUND

No - Fault-tracing information

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Fault-tracing information
The fault must be diagnosed and remedied. As this is not the case, the fault-tracing has failed.
Exit fault-tracing or try again.

Do you want to exit fault-tracing?

Yes - Exit Fault-tracing

No - Checking diagnostic trouble codes (DTCs)

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Checking the Hall sensor




If the diagnostic trouble code is permanent, the fault is probably due to a damaged or transferred hall sensor.

- Check that hall sensor 6 and the front position sensor 17 are adequately secured.
- Check the electrical connectors to hall sensor 6 and the front position sensor 17. Check for contact resistance, oxidation and loose connections.
- Visually check the hall sensor and position sensor 17 for wear and signs of malfunctioning.
- Check that the roof has not become damaged in such a way that both sensors are activated at the same time.
In the event of signs of damage, replace the relevant hall sensor or position sensor.

Other information
- Covertible Top Position Switch Covertible Top Position Switch
- Signal specification Signal Specification, Convertible Roof Module (CRM)
- Checking wiring and terminals Checking Wiring and Terminals
- Calibration of position sensor Testing and Inspection
For information on cable routing, see associated wiring diagram.





Was a fault detected?

Yes - Verification

No - Checking the Hall sensor

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Checking the Hall sensor




Activate reading out of the position sensor's status by clicking the symbol for VCT2000.
Check that the hall sensor works by placing a nut or screw, of a magnetic material, e.g. iron, against the sensor. Check at the same time that the hall sensor's read-out value changes.
If no malfunction was found, try replacing hall sensor.

Note! The roof must be calibrated after replacing the position sensors.









Continue - Verification

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