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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: Initiating Signal From Engine Control Module (ECM) (1998) >> Signal missing >> Checking open-circuit/oxidation

Checking open-circuit/oxidation

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.

Check cable between breakout box terminal #50(#4) and engine control module (ECM) #B36 on engines with control module M4.4 and MSA 15.7 for an open-circuit according to Open-circuit, permanent faults .

Check cable between breakout box terminal #48(#2) and engine control module (ECM) #B5 on engines control module Fenix 5.2 for an open-circuit according to Open-circuit, permanent faults .

Check ground terminals and switches for contact resistance and oxidation according to Contact resistance and oxidation .

Fig 1: Identifying Ohms Display
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.

Select "Continue" when the fault has been repaired.