Test point 18

Power window control 1. Pull plug I off the alarm system control module.

2. Pull off plug I on the convertible top control module.

3. Ohmmeter at alarm system control module plug I pin 18 and ground Display: °° Q

If display < 5fi, check wiring harness for chafing and pinching

1. Pull plug I off the alarm system control module.

2. Pull off the plug on the signal converter for the transponder.

3. Voltmeter at alarm system control module plug I pin 4 and ground Switch ignition on.

Display: 0 Volt

If battery voltage is displayed, check the wiring harness for pinches

Short to ground Fault code 18

Test point 19

Status lead, signal converter Short to B+ Fault code 19

Test point 20

Status lead, signal converter Short to ground Fault code 20

1. Pull plug I off the alarm system control module.

2. Pull off the plug on the signal converter for the transponder.

3. Ohmmeter at alarm system control module plug I pin 12 and ground.

Display:

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

Test point 21

W lead (DME -immobilizer) Open circuit Fault code 21

1. Pull plug I off the alarm system control module.

2. Unplug the DME (ECM) connector.

3. Ohmmeter at alarm system control module plug I pin 23 and ECM connector pin 88 or, as from model year '00, plug I pin 3

Display:

Note:

The wire is routed via the plug connection X 3/1 pin 14 (up to and including model year '99, direct wire as from model year '00).

4. Ohmmeter at alarm system control module plug I pin 23 and ground

5. Voltmeter at alarm system control module plug I pin 23 and ground

If no fault can be detected, either the DME control module or the alarm

Test point 22

Interior monitoring

Short to ground Fault code 22

1. Pull plug I off the alarm system control module.

2. Pull off the plug at the interior monitoring sensor.

3. Ohmmeter at alarm system control module plug I pin 24 and ground. If display < 5 Q, check wiring harness for chafing and pinching

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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