Circuit Description
The fuel temperature sensor is located in the fuel pump. Fuel temperature information is
passed to the engine control module (ECM) through the controller area network datalink.
Component Location
The fuel temperature sensor is located in the fuel pump.
Shop Talk
This fault code is typically set when the fuel pump controller communicates to the ECM that the fuel temperature measured in the fuel inlet to the pump (temperature sensor) exceeds the allowable threshold value (93°C [199°F]). This signal does not set a final temperature defect in the controller and, in most cases, identifies a fuel overheat condition on the engine/vehicle.
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Cummins ISB CM550 (1990-94) Fault Code: 243 PID: 121 SPN: 513 FMI: 4 Exhaust Brake Supply Circuit
Cummins ISB CM550 (1990-94) Fault Code: 242 PID: 84 SPN: 84 FMI: 10 Vehicle Speed Sensor (VSS Circuit
Cummins ISB CM550 (1990-94) Fault Code: 241 PID: 84 SPN: 84 FMI: 2 Vehicle Speed Sensor Circuit
Cummins ISB CM550 (1990-94) Fault Code: 235 PID: 111 SPN: 111 FMI: 1 Engine Coolant Level – Engine Protection
Cummins ISB CM550 (1990-94) Fault Code: 234 PID: 190 SPN: 190 FMI: 0 Engine Overspeed Circuit
