Replace interior monitoring sensor.
Test Point 37
TEST POINT 37
Interior monitoring Sensor Faulty
Fault Code 37
Fault Effect: No passenger compartment monitoring
Procedure
Replace interior monitoring sensor.
Test Point 38
TEST POINT 38
Signal Converter Faulty
Fault Code 39
Fault Effect: No engine start possible
Procedure
1. Check the power supply for the signal converter:
Disconnect the plug 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 lead for the signal converter (pin 6) to the alarm system control module plug I, pin 4 for open circuit, short to B+ and short
to ground.
3. Check the control lead for the signal converter (pin 8) to the alarm system control module plug I, pin 3 for open circuit, short to B+ and short
to ground.
Test Point 39
TEST POINT 39
Signal Converter, Coil Fault
Fault Code 40
Fault Effect: No engine start possible
Procedure
1. Check the transponder coil.
Disconnect the plug on the signal converter.
- Connect ohmmeter to pins 1 and 2
Display: 20 - 25 ohms @ 20 锟斤拷C
- Connect ohmmeter to pin 1 and ground