SPN 110 - FMI 2 (Fault Code 334)
Tuesday, August 07, 2018
Fault Codes CUMMINS ISB ISBe QSB4.5 QSB5.9 QSB6.7 ISC QSC8.3 ISL ISLe QSL9 CM850 (CM2850)
SPN110 FMI2
Engine Coolant Temperature - Data Erratic, Intermittent, or Incorrect
CODES:
Fault Code: 334
PID(P), SID(S): P110
SPN: 110
FMI: 2
Lamp: Amber
REASON: Engine Coolant Temperature - Data Erratic, Intermittent, or Incorrect. The engine coolant
temperature reading is not changed with engine operating conditions.
EFFECT: The ECM will estimate engine coolant temperature.
Circuit Description:
The engine coolant temperature sensor is used by the electronic control module (ECM) to monitor the engine coolant temperature. The ECM monitors the voltage on the signal pin and converts this to a temperature value. The engine coolant temperature value is use by the ECM for the engine protection system and engine emission control.
Component Location:
The engine coolant temperature sensor is located on the thermostat housing.
Shop Talk:
Two different failure modes of the engine coolant temperature sensor can trigger this fault code. The engine must be turned off for period of 8 hours before this diagnostic will run. When the keyswitch is turned ON after an 8 hour cold soak, engine coolant temperature is compared to intake manifold temperature. If coolant temperature is found to be higher than intake manifold temperature by a calibratable value, the fault code is logged. The diagnostic also checks to make sure that coolant temperature increases during the first 10 minutes of engine operation. If coolant temperature does not increase by a calibratable value, this fault code is logged.
Possible causes of this fault code include:
• Stuck in-range engine coolant temperature sensor.
• High resistance in the engine coolant temperature sensor signal or return lines.
On-Board Diagnostics (OBD) Information (Euro 4 Stage 1+ Certified Engines):
• The ECM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• An engine torque derate will be activated after 50 hours of engine operation with the fault code active.
• The ECM turns OFF the malfunction indicator lamp (MIL) after 1 ignition cycle that the diagnostic runs and does not fail. The MIL lamp cannot be cleared using the INSITE™ service tool.
• The fault code will be cleared from memory after 400 days or 9600 hours of engine operation.
Read More:
SPN 652 - FMI 5 (Fault Code 331)
SPN 654 - FMI 5 (Fault Code 332)
Blog.Teknisi
Engine Coolant Temperature - Data Erratic, Intermittent, or Incorrect
 |
| Engine Coolant Temperature Sensor |
CODES:
Fault Code: 334
PID(P), SID(S): P110
SPN: 110
FMI: 2
Lamp: Amber
REASON: Engine Coolant Temperature - Data Erratic, Intermittent, or Incorrect. The engine coolant
temperature reading is not changed with engine operating conditions.
EFFECT: The ECM will estimate engine coolant temperature.
Circuit Description:
The engine coolant temperature sensor is used by the electronic control module (ECM) to monitor the engine coolant temperature. The ECM monitors the voltage on the signal pin and converts this to a temperature value. The engine coolant temperature value is use by the ECM for the engine protection system and engine emission control.
Component Location:
The engine coolant temperature sensor is located on the thermostat housing.
Shop Talk:
Two different failure modes of the engine coolant temperature sensor can trigger this fault code. The engine must be turned off for period of 8 hours before this diagnostic will run. When the keyswitch is turned ON after an 8 hour cold soak, engine coolant temperature is compared to intake manifold temperature. If coolant temperature is found to be higher than intake manifold temperature by a calibratable value, the fault code is logged. The diagnostic also checks to make sure that coolant temperature increases during the first 10 minutes of engine operation. If coolant temperature does not increase by a calibratable value, this fault code is logged.
Possible causes of this fault code include:
• Stuck in-range engine coolant temperature sensor.
• High resistance in the engine coolant temperature sensor signal or return lines.
On-Board Diagnostics (OBD) Information (Euro 4 Stage 1+ Certified Engines):
• The ECM illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• An engine torque derate will be activated after 50 hours of engine operation with the fault code active.
• The ECM turns OFF the malfunction indicator lamp (MIL) after 1 ignition cycle that the diagnostic runs and does not fail. The MIL lamp cannot be cleared using the INSITE™ service tool.
• The fault code will be cleared from memory after 400 days or 9600 hours of engine operation.
Read More:
SPN 652 - FMI 5 (Fault Code 331)
SPN 654 - FMI 5 (Fault Code 332)
Blog.Teknisi
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