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Home >> Fiat >> 2018 >> 500 Lounge, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Electric Vehicle Control Unit (EVCU) Module - DTCS P1139-00 To U1487-00 - 500 - Electric) >> DTC Troubleshooting >> P1640-00-Shift Module Motor Performance >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
(H25) MOTOR (-) CIRCUIT OPEN OR SHORTED TO GROUND
(H25) MOTOR (-) CIRCUIT OPEN OR SHORTED TO VOLTAGE
(H26) MOTOR (+) CIRCUIT OPEN OR SHORTED TO GROUND
(H26) MOTOR (+) CIRCUIT OPEN OR SHORTED TO VOLTAGE
PARK PAWL MOTOR
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 HIGH-VOLTAGE POWER DOWN PROCEDURE to perform the High Voltage Power Down procedure.

Always perform the Pre-Diagnostic Troubleshooting Procedure before proceeding. Refer to  EVCU PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .