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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (1.6L Engine - DTCS P0646 To P127C) >> Diagnosis And Testing >> P0691-Low Speed Fan Relay Control Circuit >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(A16) FUSED (B+) CIRCUITS
(Z903) GROUND CIRCUIT
(N201) LOW SPEED RAD FAN CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE
(N201) LOW SPEED RAD FAN CONTROL CIRCUIT OPEN
(N201) LOW SPEED RAD FAN CONTROL CIRCUIT SHORTED TO GROUND
RADIATOR COOLING FAN MODULE
POWERTRAIN CONTROL MODULE

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