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Home >> Fiat >> 2014 >> 500c Abarth >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Body Control Module (BCM) - DTCS B226A-00 To U1493-00 - 500E) >> Diagnosis And Testing >> U1218-00-Lost Communication With Electric Cabin Heater >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2014 Fiat 500e. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
FUSED B(+) CIRCUIT OPEN OR SHORTED TO GROUND
GROUND CIRCUIT OPEN
LIN BUS CIRCUIT OPEN
ELECTRIC CABIN HEATER
WARNING:

On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury. Refer to STANDARD PROCEDURE .

NOTE: When performing any key-on procedure you must charge the 12 volt battery with a setting of 20 amps minimum or the High Voltage Battery could discharge below recommended manufacture specifications and destroy the battery cells.