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Home >> Volvo >> 2003 >> C70 2.3 53, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Immobilizer Module (IMM) And Guard Lock And Alarm (GLA) - Diagnostic Trouble Codes (DTC) (Coupe)) >> IMM-321: Initiation Signal From Engine Control Module (ECM), Signal Missing (1999-2002) >> Signal missing >> Replacing engine control module

Replacing engine control module

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Install the new engine control module (ECM) with correct P/N.

CAUTION:

The engine control module (ECM) must not be disconnected until at least 4 minutes after switching off the ignition. Neither may it be disconnected while the engine cooling fan (FC) is still running. (If nothing else is indicated when replacing the relevant engine control module (ECM)).

Select Continue when the fault has been remedied. 

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