Test Point 38

Fault Code 39
Signal converter faulty.

1. Check the power supply for the signal converter:
- Disconnect the connector on the signal converter.
- Voltmeter at plug housing pin 4 (negative) and pin 5 (positive).
Ignition key inserted.
Display: Battery voltage.
2. Check the control line for the signal converter (pin 6) to the alarm control unit plug I pin 4 for continuity, positive short and ground short.
3. Check the status line for the signal converter (pin 7) to the alarm control unit plug I pin 12 for continuity, positive short and ground short.
4. Check the data line for the signal converter (pin 8) to the alarm control unit plug I pin 3 for continuity, positive short and ground short.