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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (3.0L Diesel - DTCS P0627-00 To P1692-00) >> DTC Troubleshooting >> P0691-00-Cooling Fan 1 Control Circuit Low >> Set Condition

Set Condition

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The Powertrain Control Module (PCM) sends a Pulse-Width Modulated (PWM) signal to the Cooling Fan Module to operate the Engine Cooling Fan. The PCM detects that the Cooling Fan Control circuit is below a calibrated voltage for a calibrated threshold of time.

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