Checking Hands-Free and Handset Mode, Phone Module (PHM)
Checking hands-free and handset mode
Fault-tracing information
The phone module (PHM) determines whether the call should be connected via hands-free or the handset based on the hook signal of the handset. If the handset is in its holder (i.e. "on the hook"), all calls are connected via hands-free. The handset is activated when it is removed from its holder.
Check that the handset is properly positioned in its holder.
- Ignition in position 1.
- Telephone call connected.
Switch between handset and hands-free mode via the menu in the display.
Do both handset and hands-free mode work?
Yes - Verification
No - Checking the telephone holder magnet
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Checking the telephone holder magnet
The handset houses a detector that is actuated by the magnetic field from the telephone holder magnet. It closes or opens a circuit depending on whether the handset is in or out of the holder.
Check whether the Phone module (PHM) detects that the handset is removed and placed back in its cradle by clicking the VCT2000 symbol.
If the Phone module (PHM) cannot detect whether the handset is in or out of its cradle, continue fault tracing the magnet as follows:
- Lift up the handset.
- Run a metal object over the magnet (paper clip or similar). See the illustration.
- If there is a strong reaction, the magnet is functional.
- If there is no reaction, replace the holder with magnet.
If the function check is successful the fault has been remedied.
Other information:
- Signal specification Signal Specification, Phone Module (PHM)
Was a fault detected?
Yes - Verification
No - Checking the connectors
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Checking the connectors
With functioning magnet but still lost function of the handset, try checking the connectors for the handset.
- Check that the connector (1) for the secrecy handset in the center console is connected.
- Check that the cable terminals of the connector have not retracted and that they are in the locked position.
With correctly connected connector but still lost function of the handset, try with another handset.
If this handset works, replace with a new handset.
If there is no function, replace the holder with magnet.
Other information:
Was a fault detected?
Yes - Verification
No - Information
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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.
- Switch on the carphone.
Make a call so that both the handset and the hands-free system are used. See the instruction manual.
Is the carphone working?
Yes - FAULT FOUND
No - Information
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Information
Information
Fault-tracing information
The fault must now be detected and remedied. As this is not the case, troubleshooting has failed.
Exit symptom symptom troubleshooting or try again.
Do you want to exit symptom troubleshooting?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Fault-tracing information
FAULT-TRACING FAILED - No Fault Found
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