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Home >> Volvo >> 2003 >> C70 2.3 53, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Electronic Climate Control (ECC), Manual Climate Control (MCC), Heater Module (HEA) - Diagnostic Trouble Code (DTC) Diagnostics - 2 Of 2 (Coupe)) >> HEA-843: Control Module Power Supply. Signal Too High (1999-2002) >> Signal Too High >> Intermittent Fault

Intermittent Fault

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.

The control module has earlier registered too high voltage. This may have been caused by a battery charger with faulty voltage being connected to the battery or an intermittent fault in the charging regulator.

Fig 1: Identifying Battery
GLL101059Courtesy of VOLVO CARS OF NORTH AMERICA.
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