SPN 635 - FMI 6 (Fault Code 395)
Wednesday, July 11, 2018
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SPN635 FMI6
Engine Timing Actuator Driver Circuit - Current Above Normal or Grounded Circuit
CODES:
Fault Code: 395
PID(P), SID(S): S20
SPN: 635
FMI: 6/6
Lamp: Amber
REASON: High current detected at the front timing actuator circuit.
EFFECT: Possible reduced engine performance.
Circuit Description:
The timing actuators are actuated by the engine control module (ECM) to control fuel metering. Each timing actuator is connected to the ECM by a supply and a return wire. An electrical pulse is sent to the timing actuator from the ECM on the supply wire and returns to the ECM on the return wire. Each solenoid valve is normally closed, and it is only opened by an electrical pulse from the ECM during metering.
Component Location:
The front timing actuator is located on the fuel control housing.
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) has detected high current at the front timing actuator circuit.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) 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 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 amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• 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 causes of this fault code include:
• A short circuit to battery in the engine harness.
• Low actuator resistance.
• Supply wire open or shorted to ground.
Read More:
SPN 1244 - FMI 6 (Fault Code 397)
SPN 1244 - FMI 5 (Fault Code 396)
Blog.Teknisi
Engine Timing Actuator Driver Circuit - Current Above Normal or Grounded Circuit
 |
| Front Timing Actuator Circuit |
CODES:
Fault Code: 395
PID(P), SID(S): S20
SPN: 635
FMI: 6/6
Lamp: Amber
REASON: High current detected at the front timing actuator circuit.
EFFECT: Possible reduced engine performance.
Circuit Description:
The timing actuators are actuated by the engine control module (ECM) to control fuel metering. Each timing actuator is connected to the ECM by a supply and a return wire. An electrical pulse is sent to the timing actuator from the ECM on the supply wire and returns to the ECM on the return wire. Each solenoid valve is normally closed, and it is only opened by an electrical pulse from the ECM during metering.
Component Location:
The front timing actuator is located on the fuel control housing.
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) has detected high current at the front timing actuator circuit.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) 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 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 amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• 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 causes of this fault code include:
• A short circuit to battery in the engine harness.
• Low actuator resistance.
• Supply wire open or shorted to ground.
Read More:
SPN 1244 - FMI 6 (Fault Code 397)
SPN 1244 - FMI 5 (Fault Code 396)
Blog.Teknisi
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