Fault Code 21 - W Lead Porsche

5. If no fault can be detected on the wiring harness, reattach the plug to the alarm control module and the airbag control module.

6. Switch on the ignition and clear the fault memory of the alarm

If the fault no longer occurs, the DME control module is faulty.

If the fault occurs again, detach the plug on the airbag control module.

7. Clear the fault memory of the airbag system.

If the fault no longer occurs, the airbag control module is faulty. If the fault occurs again, the alarm system control module is faulty.

Test point 18

Power window control Short to ground Fault code 18

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

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

3. Ohmmeter on alarm control module plug I pin 18 and ground.

If display <5 £2, check wiring harness for chafing and pinching

Test point 19

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

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

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

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

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

Test point 20

Status lead, signal converter Short to ground Fault code 20

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

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

3. Ohmmeter on alarm control module plug I pin 12 and ground. 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 off plug I on the alarm control module.

2. Unplug the DME (ECM) connector.

3. Ohmmeter at plug I, alarm control module pin 23, and

Note

The lead is routed via plug connection X 3/1 pin 14.

4. Ohmmeter on alarm control module plug I pin 23 and ground. Display: °° Q

5. Voltmeter at plug I alarm control module pin 23 and ground. Switch ignition on.

Display: 0 Volt

If no fault can be detected in the wires, either the DME control module or the alarm system control module is faulty.

90 01 Diagnosis/troubleshooting, alarm system two-motor lock

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Responses

  • ottone
    What is a porsche 911 dme and immobilizer?
    1 year ago
  • gerald
    Where short porsche 996 obd socket?
    1 year ago

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