Test point 18

Power window control 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.

If display < 5 Q, check the wiring harness for pinches and chafing damage.

Ground short Fault code 18

Test point 19

Status line, signal converter Positive short Fault code 19

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.

If the battery voltage is displayed, check the wiring harness for pin-

Test point 20

Status line, signal converter Ground short Fault code 20

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.

If display < 5 Q, check the wiring harness for pinches and chafing

Fault, fault code

Test point 21

W-line (DME immobilizer) Interruption Fault code 21

1. Pull off plug I on the alarm control unit.

2. Pull off the DME plug.

3. Ohmmeter at plug alarm control unit pin 23, and DME plug pin 88.

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