Checking the Handset

Checking the handset

Checking components and wiring




- Ignition off.
Check the cable (microphone signal) between car-phone module A3 (terminal #3) and the handset D3(#34). Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable (speaker signal) between car-phone module A12 (12) and handset D4(terminal #35). Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable (power supply) between car-phone module A13 (terminal #13) and handset D7(terminal #38). Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable (cradle signal) between car-phone module A14 (terminal #14) and handset D6 (terminal #37). Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable (ground) between car-phone module A2 (terminal #2) and handset D5 (terminal #36). Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Try replacing the handset.
Remedy as necessary.

Other information:
- To access and replace the handset, see Replacing the handset Replacing the Handset
- To access and replace the car-phone module, see Telephone module/-control module (PHM), changing Service and Repair
- For information about signals and connectors, see Signal description. Phone module (PHM) Signal Specification
- To connect the breakout box, see Connecting the breakout box. Car phone module Connecting the Breakout Box.













Was a fault detected?

Yes - FAULT FOUND

No - No Fault Found

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