LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2009 >> Durango Base, 3.7 K >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> (Front Control Module (FCM) - Electrical Diagnostics) >> DTC Troubleshooting >> P0691-Cooling Fan 1 Relay Control Circuit Low >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

Possible Causes 
(A16) FUSED B+ CIRCUIT
(N201) LOW SPEED FAN RELAY CONTROL CIRCUIT OPEN
(N201) LOW SPEED FAN RELAY CONTROL CIRCUIT SHORTED TO GROUND
LOW SPEED RADIATOR FAN RELAY
FRONT CONTROL MODULE (FCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  .