Fault Effect: Power window control without function
Procedure
1. Pull off plug I on the alarm control unit.
2. Pull off plug I on the convertible top control unit.
3. Ohmmeter at plug I alarm control unit pin 18 and ground.
Display: infinity
If display < 5 ohms, check the wiring harness for pinches and chafing damage.
Test Point 19
TEST POINT 19
Status Line, Signal Converter, Positive Short
Fault Code 19
Fault Effect: No engine start possible
Procedure
1. Pull off plug I on the alarm control unit.
2. Pull off the plug on the signal converter for the transponder.
3. Voltmeter at plug I alarm control unit pin 12 and ground. Switch on the ignition.
Display: 0 Volts
If the battery voltage is displayed, check the wiring harness for pinches and chafing damage.
Test Point 20
TEST POINT 20
Status Line, Signal Converter, Ground Short
Fault Code 20
Fault Effect: No engine start possible
Procedure
1. Pull off plug I on the alarm control unit.
2. Pull off the plug on the signal converter for the transponder.
3. Ohmmeter at plug I alarm control unit pin 12 and ground.
Display: infinity
If display < 5 ohms, check the wiring harness for pinches and chafing damage.
Test Point 21
TEST POINT 21
W-line (DmE Immobilizer) Interruption
Fault Code 21
Fault Effect: No engine start possible