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Home >> Volvo >> 2004 >> V40 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Guard Lock And Alarm (GLA) & Immobilizer Module (IMM) Diagnostic Trouble Codes >> IMM-321: Communication With The Engine Control Module (ECM). Signal Missing (B4204T2 CVVT; 2000) >> Signal missing >> Replacing a component

Replacing a component

Install a new Engine control module (ECM) with correct part no.

CAUTION:

The Engine control module (ECM) must not be connected until at least 10 seconds after the ignition has been switched off and the blower fan has stopped running.

Continue when the fault has been remedied. 

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