P1651 CHEVROLET - Fan 1 Relay Control Circuit
Repair Importance Level:
Repair Difficulty Level:
- Faulty Fan 1 Relay
- Fan 1 Relay harness is open or shorted
- Fan 1 Relay circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1651 Chevrolet Description
Output Driver Modules (ODM) are used by Powertrain Control Module (PCM) to turn on current-driven devices needed to control various engine and transaxle functions. Each ODM can control up to 7 outputs, including fan 1 relay, by supplying ground to device PCM is commanding on. ODMs can diagnose each circuit individually.
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