SPN 111 - FMI 1 (Fault Code 235)
Sunday, July 15, 2018
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SPN111 FMI1
Coolant Level - Data Valid But Below Normal Operating Range - Most Severe Level
CODES:
Fault Code: 235
PID(P), SID(S): P111
SPN: 111
FMI: 1/1
Lamp: Red
REASON: The engine coolant is severely low.
EFFECT: Engine may be shut down.
Circuit Description:
The coolant level sensor is a switch and is used to measure the level of the engine coolant in the radiator top tank. The coolant level sensor is immersed in the coolant and returns a different signal voltage when immersed in coolant versus being out of coolant. The engine control module (ECM) monitors the change in the signal voltage to determine the level of the engine coolant.
Component Location:
The engine coolant level sensor is typically located in the radiator top tank or surge tank. Refer to the OEM service manual for the location.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the coolant level was below normal.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
• The engine will be shut down if the Engine Protection Shutdown feature is enabled.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
• It is necessary to use the "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent to clear this fault.
Shop Talk:
Possible causes of this fault code include:
• Low coolant level
Read More:
SPN 84 - FMI 2 (Fault Code 241)
SPN 84 - FMI 10 (Fault Code 242)
Blog.Teknisi
Coolant Level - Data Valid But Below Normal Operating Range - Most Severe Level
 |
| Engine Coolant Level Sensor Circuit |
CODES:
Fault Code: 235
PID(P), SID(S): P111
SPN: 111
FMI: 1/1
Lamp: Red
REASON: The engine coolant is severely low.
EFFECT: Engine may be shut down.
Circuit Description:
The coolant level sensor is a switch and is used to measure the level of the engine coolant in the radiator top tank. The coolant level sensor is immersed in the coolant and returns a different signal voltage when immersed in coolant versus being out of coolant. The engine control module (ECM) monitors the change in the signal voltage to determine the level of the engine coolant.
Component Location:
The engine coolant level sensor is typically located in the radiator top tank or surge tank. Refer to the OEM service manual for the location.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the coolant level was below normal.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
• The engine will be shut down if the Engine Protection Shutdown feature is enabled.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
• It is necessary to use the "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent to clear this fault.
Shop Talk:
Possible causes of this fault code include:
• Low coolant level
Read More:
SPN 84 - FMI 2 (Fault Code 241)
SPN 84 - FMI 10 (Fault Code 242)
Blog.Teknisi
I have full coolant. Could it be just bad sensor? It is 2020 freightliner 26ft box truck. 61k miles.
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