SPN 1188 - FMI 4 (Fault Code 466)
Thursday, July 05, 2018
Automatic Lubrication System,
Fault Codes CUMMINS GTA38 K38 K50 QSK38 QSK50/60 CM850,
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SPN1188 FMI4
Engine Turbocharger Wastegate Actuator 1 Position Circuit - Voltage Below Normal or Shorted to Low Source
CODES:
Fault Code: 466
PID(P), SID(S): S32
SPN: 1188
FMI: 4/4
Lamp: Amber
REASON: Low voltage detected at the wastegate actuator number 1 circuit.
EFFECT: Engine power derate.
Circuit Description:
The wastegate actuators are devices used by the Engine Control Module(ECM) to control boost pressure.
Component Location:
The wastegate controller is located on the air inlet horn.
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 wastegate actuator circuit voltage was out of range low.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
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 ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• Use the recommended Cummins® electronic service tool or equivalent to verify the fault code is inactive.
• The “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
Possible cause of this fault code:
Malfunctioning turbocharger wastegate
• A short circuit to ground in the engine harness
• An open circuit in the engine harness
Read More:
SPN 94 - FMI 18 (Fault Code 482)
SPN 1349 - FMI 3 (Fault Code 483)
Blog.Teknisi
Engine Turbocharger Wastegate Actuator 1 Position Circuit - Voltage Below Normal or Shorted to Low Source
 |
| Wastegate Actuator |
CODES:
Fault Code: 466
PID(P), SID(S): S32
SPN: 1188
FMI: 4/4
Lamp: Amber
REASON: Low voltage detected at the wastegate actuator number 1 circuit.
EFFECT: Engine power derate.
Circuit Description:
The wastegate actuators are devices used by the Engine Control Module(ECM) to control boost pressure.
Component Location:
The wastegate controller is located on the air inlet horn.
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 wastegate actuator circuit voltage was out of range low.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
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 ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• Use the recommended Cummins® electronic service tool or equivalent to verify the fault code is inactive.
• The “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
Possible cause of this fault code:
Malfunctioning turbocharger wastegate
• A short circuit to ground in the engine harness
• An open circuit in the engine harness
Read More:
SPN 94 - FMI 18 (Fault Code 482)
SPN 1349 - FMI 3 (Fault Code 483)
Blog.Teknisi
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