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Cummins ISB CM550 (1990-94) Fault Code: 515 PID: 91 SPN: 91 FMI: 4 Coolant Level Sensor Circuit
Posted by PerDiezel Solutions on
Circuit DescriptionThe coolant level sensor monitors the coolant level within the coolant system and passesinformation to the electronic control module (ECM) through the engine harness. Component LocationThe coolant level sensor is located in the radiator top tank or surge tank. Shop TalkThis is an original equipment manufacturer (OEM)-supplied component and will vary in sensorlocation.1) If a shorting plug is used in the coolant level circuit, verify that it is wired correctly.2) Inspect the wiring harness between the Weather-Pack four-way connector and the coolant level sensor for damage.3) Make sure the coolant level sensor is located in the middle of the...
Cummins ISB CM550 (1990-94) Fault Code: 516 PID: 91 SPN: 91 FMI: 3 Coolant Level Sensor Circuit
Posted by PerDiezel Solutions on
Circuit DescriptionThe coolant level sensor monitors the coolant level within the coolant system and passesinformation to the electronic control module (ECM) through the engine harness. Component LocationThe coolant level sensor is located in the radiator top tank or surge tank. Shop TalkThis is an original equipment manufacturer (OEM)-supplied component and will vary in sensorlocation.1) If a shorting plug is used in the coolant level circuit, verify that it is wired correctly.2) Inspect the wiring harness between the Weather-Pack four-way connector and the coolant level sensor for damage.3) Make sure the coolant level sensor is located in the middle of the...
Cummins ISB CM550 (1990-94) Fault Code: 516 PID: 91 SPN: 91 FMI: 3 Coolant Level Sensor Circuit
Posted by PerDiezel Solutions on
Circuit DescriptionThe coolant level sensor monitors the coolant level within the coolant system and passesinformation to the electronic control module (ECM) through the engine harness. Component LocationThe coolant level sensor is located in the radiator top tank or surge tank. Shop TalkThis is an original equipment manufacturer (OEM)-supplied component and will vary in sensorlocation.1) If a shorting plug is used in the coolant level circuit, verify that it is wired correctly.2) Inspect the wiring harness between the Weather-Pack four-way connector and the coolant level sensor for damage.3) Make sure the coolant level sensor is located in the middle of the...
Cummins ISB CM550 (1990-94) Fault Code: 516 PID: 91 SPN: 91 FMI: 4 Coolant Level Sensor Circuit
Posted by PerDiezel Solutions on
Circuit DescriptionThe coolant level sensor monitors the coolant level within the coolant system and passesinformation to the electronic control module (ECM) through the engine harness. Component LocationThe coolant level sensor is located in the radiator top tank or surge tank. Shop TalkThis is an original equipment manufacturer (OEM)-supplied component and will vary in sensorlocation.1) If a shorting plug is used in the coolant level circuit, verify that it is wired correctly.2) Inspect the wiring harness between the Weather-Pack four-way connector and the coolant level sensor for damage.3) Make sure the coolant level sensor is located in the middle of the...
Cummins ISB CM550 (1990-94) Fault Code: 517 PID: 252 SPN: FMI: Fuel Pump Valve Feedback Error
Posted by PerDiezel Solutions on
Circuit DescriptionA mechanically stuck fuel control valve has been detected by the pump controller. Component LocationThe fuel pump is located on the backside of the gear housing. Shop TalkThis fault is typically set when a fuel pump beginning of injection point error (bit 10) isrecognized at engine speeds of more than 700 rpm and commanded fueling of more than 20mm³ for two seconds at a battery voltage of 9 VDC. In most instances, Fault Code 517 will occur in conjunction with Fault Code 363. The same diagnostic steps can be applied. The fault code can also be triggered by electrical...