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Home >> Dodge and Ram >> 2024 >> ProMaster 2500 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Electric Vehicle Control Unit Module (EVCU) - DTCS P0691-00 To P0A02-00) >> DTC Troubleshooting >> P0691-00 Cooling Fan 1 Control Circuit Low >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2024 RAM ProMaster EV. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
LOW VOLTAGE DTC IN ELECTRIC VEHICLE CONTROL UNIT (EVCU)
COOLING FAN CONTROL CIRCUIT SHORT TO GROUND
COOLING FAN CONTROL CIRCUIT OPEN
COOLING FAN MODULE
ELECTRIC VEHICLE CONTROL UNIT (EVCU)

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