Checking the Carphone Handset
Checking the carphone handset
Checking structure week
- Ignition on
Read out the vehicle's structure week by clicking on the symbol for VCT2000.
1. Vehicles with structure week up to and incl. 200445, that is, year 2004 week 45.
2. Vehicles with structure week from and incl. 200446, that is, year 2004 week 46.
Select one of the above alternatives.
1 - Checking components and wiring 1
2 - Checking components and wiring 2
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Checking components and wiring 1
In case of open circuit/short-circuiting of cables, defective handset or connector, the carphone handset will not work. This results in the user only being able to use handsfree.
Checking connectors and cables
Check the cable for voltage feed between phone module (PHM) connector #A7 (#7) and the handset's connector #5 (#25) for open circuit.
Check the cable for ground between phone module (PHM) connector #A18 (#18) and the handset's connector #3 (#23) for open circuit, short-circuit to ground and short-circuit to voltage.
Check the connectors for loose connections, damaged or bent pins as well as oxidation.
If no malfunction was found, try replacing the handset.
Other information:
- For further information about the fuses and relays, see wiring diagram.
- Connecting the breakout box Connecting the Breakout Box, Phone Module (PHM)
- Signal specification Signal Specification, Phone Module (PHM)
- Location of components Locations
- Phone module (PHM), replacing Phone Module (PHM), Replacing
- Handset, replacing Handset, Replacing
- Checking wiring and terminals Checking Wiring and Terminals
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Checking components and wiring 2
Checking the carphone handset
Checking components and wiring
The carphone handset will not function in the event of an open-circuit or short-circuit in the wiring, of a defective handset or faulty connectors. This means that the user will only be able to use the handsfree function.
Checking the connectors and cables
Check the power supply cable between phone module (PHM) connector terminal #11 (#53) and handset connector terminal #5 (#25). Check for an open-circuit.
Check the ground cable between phone module (PHM) connector terminal #B6 (#48) and handset connector terminal #3 (#23). Check for an open-circuit, for a short-circuit to ground and a short-circuit to supply voltage.
Check the connectors for loose connections, damaged or bent terminal pins and oxidation.
Try replacing the carphone handset if no fault is found.
Other information:
- To access the phone module (PHM), see Phone module (PHM), replacing Phone Module (PHM), Replacing
- To access or replace the handset, see Handset, replacing Handset, Replacing
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Phone Module (PHM)
- For information about signals and connectors, see Signal specification Signal Specification, Phone Module (PHM)
- Checking wiring and terminals Checking Wiring and Terminals.
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