Checking components and wiring
Check the cable between keypad unit / carphone module terminal #A1 and handset terminal #E3. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults . Check for an open-circuit according to Open-circuit, permanent faults .
Check the cable between keypad unit / carphone module terminal #A2 and handset terminal #E5. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults . Check for an open-circuit according to Open-circuit, permanent faults .
Check the cable between keypad unit / carphone module terminal #A4 and handset terminal #E6 for a short-circuit to ground according to Short-circuit to ground, permanent faults .
Check the cable between keypad unit / carphone module terminal #A3 and handset terminal #E7 for an open-circuit according to Open-circuit, permanent faults .
Check the cable between carphone box terminal #C1 and keypad unit / carphone module terminal #B1 for an open-circuit according to Open-circuit, permanent faults .
Check the cable between carphone box terminal #C8 and keypad unit / carphone module terminal #B8 for an open-circuit according to Open-circuit, permanent faults .
Remedy as necessary.
If no fault was found try a new handset.
Other information:
- To access and replace the handset, see Handset holder
- To access and replace the carphone box, see Carphone box
- To access and replace the keypad unit / carphone module:
- For -2004, see:Radio cassette player, replacing .
- For 2005-, see:Audio unit, replacing .
- For information about signals and connectors, see Signal specification, Keypad unit / carphone module (PHM)
- To connect the breakout box, see Connecting the breakout box, Carphone module .