Connecting Breakout Box (Connector A)

Connecting breakout box, connector A

Connecting the breakout box

Is the breakout box connected to the Motronic 4.4 connector?

Yes - No Fault Found

No - Connecting breakout box to Motronic 4.4 connector A (black)

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Connecting breakout box to Motronic 4.4 connector A (black)
- Ignition off.
- Disconnect control module.

Note! The engine control module (ECM) must not be removed from the car until the main relay has interrupted its power supply. This may take up to 150 seconds (cars with an immobilizer 245 seconds) after the ignition has been switched off.

Connect adapter 951 1351 ADAPTOR 86-PIN 951 1351 Adaptor 86-Pin to engine control module (ECM) connector and connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to adapter.





Continue - Checking ground terminals

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Checking ground terminals




- Ignition off.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
Connect an ohmmeter between battery negative terminal and:
- #13 (#A13) on the breakout box.
- #28 (#A28) on the breakout box.
- #42 (#A42) on the breakout box.









The ohmmeter should read approximately 0 ohms for all readings.

OK - Reading is OK

Not OK - Checking for an open-circuit

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Checking for an open-circuit




- Check ground terminals 31/32 and 31/33 at rear of engine and their cables for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Check ground lead between engine and chassis for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Continue - No Fault Found

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Reading is OK
- Return to the fault-tracing procedure where it was interrupted.

Continue - No Fault Found

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