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volvo Workshop Repair Guides


V90 L6-2.9L VIN 96 B6304S (1998)

Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Service and Repair > Connecting and Disconnecting ECM > Page 308

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Engine Control Module: Service and Repair
Replacing Engine Control Module

Points To Observe When Replacing Engine Control Module

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When changing an engine control module (ECM) from one car to another, remember to note any diagnostic trouble codes (DTCs) before
removing engine control module from the car.

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Always check the engine control module and cable harness connectors for bent or damaged pins and sockets which may be the cause of faults.

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Remove soundproofing panel and lower A-pillar panel.

Removing Locking Strip

As part of the anti-theft system on cars equipped with an engine immobilizer, the engine control module is locked into place with a locking strip. The
locking strip is installed with a security screw.

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Mark up the center of the screw and drill a suitable hole for a screw puller. Insert screw puller and remove the screw.

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Remove the locking strip.

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Clean swarf from cover.

Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Service and Repair > Connecting and Disconnecting ECM > Page 308

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