Cummins ISM CM875 (2003-06) Fault Code: 2377 PID: S33 SPN: 647 FMI: 3/3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.

The ECM monitors the voltage level on this circuit. When the ECM commands the fan signal low, it expects the voltage level to be approximately 0 volts. If it detects a higher voltage, this fault is recorded. This usually indicates an open circuit or short circuit to a voltage source in the harness.

Once the fault code becomes active, the fan must be cycled to clear the code. This can be done by cycling the manual fan switch, if equipped, or by operating the engine and satisfying the fan engagement requirements.

If Fault Code 2377 is still active after completing the following troubleshooting steps, consult the OEM service literature for procedures to check the fan clutch device for an open circuit or short circuit to ground.

Possible repairs:

1)Replace the fan control solenoid.
2)Repair or replace the OEM harness.
3)Replace the ECM.

Related

Categories Cumminz, DTC TRUCKS, ISM CM875 (2003-06) Tags -, 2003-06, 2377, 3/3, 647, Above, at, Circuit, Circuit., CM875, Code, Control, Cummins, Detected, Fan, Fault, FMI, High, ISM, Normal, Open, or, PID, S33, Shorted, Source., SPN, the, to, Voltage

Volvo PROSIS Offline 2019 Parts Catalog Installation Service
Trucks software $45.00
Rated 0 out of 5
Noregon JPRO Commercial Fleet Diagnostics 2017 v3
JPRO $35.00
Rated 0 out of 5
Meritor Wabco Tool Box 12.9.1
Trucks software $35.00
Rated 0 out of 5
Diamond Logic Builder DLB 2019 Database 2019
Navistar $50.00
Rated 0 out of 5
Allison Doc Premium Update 2023 v2
Allison $102.00
Rated 0 out of 5

Detroit Diagnostic Link (DDDL 8.09) Engineering level 10
Detroit $40.00
Rated 0 out of 5
Volvo Premium Tech Tool PTT 2.8.130 Diagnostic Software 04.2022 ACPI ( 1 PC )
Trucks software $143.00
Rated 0 out of 5
DOWNLOAD NISSAN UD DIESEL PC-CONSULT DIAGNOSTIC 1.1.13 & PC-REPROMASTER 1.2.0
NISSAN UD $100.00
Rated 0 out of 5
Allison DOC 2021 V2 (1PC)
Allison $67.00
Rated 0 out of 5
Allison DOC 2019 PC software + GEN5 2019 truck
Allison $40.00
Rated 0 out of 5
Diamond Logic Builder DLB 2019 Database 2019
Navistar $50.00
Rated 0 out of 5
Eaton Service Ranger 4 4.2 database 2017
Eaton $50.00
Rated 0 out of 5
Wabco Diagnostic Software 2021 (Tebs-E 6.01) + PINS
Trucks software $60.00
Rated 0 out of 5
Diagnostic Software for Navistar Diamond Logic Builder 2023 (DLB)
Navistar $94.00
Rated 0 out of 5
Caterpillar ET 2022A Electronic Technician + Factory Password (1PC)
CAT $96.00
Rated 0 out of 5
Scania SDP3 2.48.6 Diagnosis & Programming for VCI 3 VCI3 without Dongle
Scania $30.00
Rated 0 out of 5
JOHN DEERE SERVICE ADVISOR 5.3.225 DATABASE AG + CF ENGLISH 2023
John Deere $250.00
Rated 0 out of 5
MANUAL SERVICE DEUTZ AGROTRON 108-118-128
Trucks software $38.00
Rated 0 out of 5
Allison Doc Premium Update 2023 v2
Allison $102.00
Rated 0 out of 5
Wabco PIN Code Calculator Diagnostic Software PIN 1 PIN 2
Trucks software $10.00
Rated 0 out of 5

SERVICE MANUAL Fuso FK & FM Series 1996-2001
FUSO $38.00
Rated 0 out of 5
DETROIT DT12 TRANSMISSIONS – Service manual – PDF
DETROIT $55.00
Rated 0 out of 5
SERVICE MANUAL BOBCAT 310 – 313 SMS
BOBCAT $45.00
Rated 0 out of 5
SERVICE MANUAL BOBCAT 56-76 sms
BOBCAT $51.00
Rated 0 out of 5
SERVICE MANUAL BENDIX EC-60
BENDIX $17.00
Rated 0 out of 5
SERVICE MANUAL VOLVO D13 (2009)
TRUCK MANUALS $25.00
Rated 0 out of 5
SERVICE MANUAL BOBCAT 3200 sms
BOBCAT $40.00
Rated 0 out of 5
SERVICE MANUAL International Engines DT466 & DT530 (2001-2003) C
INTERNATIONAL ENGINES $31.00
Rated 0 out of 5
SERVICE MANUAL HINO FD.FE.FF.SG 2017
HINO $36.00
Rated 0 out of 5
SERVICE MANUAL BOBCAT 2410 sms
BOBCAT $34.00
Rated 0 out of 5