SPN 627 - FMI 12 (Fault Code 351)
SPN 627 - FMI 12 (Fault Code 351)
SPN627 FMI12
CODES:
Fault Code: 351
PID(P), SID(S): S251
SPN: 627
FMI: 12
Lamp: AMBER
SRT:
REASON: Injector Power Supply - Bad Intelligent Device or Component.
The ECM measured injector boost voltage is low.
EFFECT: Possible low power, engine misfire, and/or engine will NOT start.
Circuit Description:
Between each injection event, the electronic control module (ECM) attempts to recharge the injector power supply. The injector power supply consists of a bank of capacitors; this power supply is maintained at high voltage. Recharging is accomplished by recovering energy stored in the injector solenoids. For the injector power supply to remain fully charged, there must be good ECM battery power and ground, a good engine speed sensor, and good injector circuits.
Component Location:
The injector power supply is located inside the ECM.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine speed is greater than 500 rpm.
Conditions for Setting the Fault Codes:
The ECM detects that the measured injector power supply voltage is lower than the commanded injector power supply voltage.
Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code:
The ECM will turn off the amber CHECK ENGINE light immediately after the keyswitch is cycled.
Shop Talk:
Read More:
SPN 110 - FMI 2 (Fault Code 334)
SPN 629 - FMI 12 (Fault Code 343)
Blog.Teknisi
SPN627 FMI12
 |
| ISC and ISL with CM2150 - Injector Power Supply |
CODES:
Fault Code: 351
PID(P), SID(S): S251
SPN: 627
FMI: 12
SRT:
 |
| ISB with CM2150 - Injector Power Supply |
REASON: Injector Power Supply - Bad Intelligent Device or Component.
The ECM measured injector boost voltage is low.
EFFECT: Possible low power, engine misfire, and/or engine will NOT start.
Circuit Description:
Between each injection event, the electronic control module (ECM) attempts to recharge the injector power supply. The injector power supply consists of a bank of capacitors; this power supply is maintained at high voltage. Recharging is accomplished by recovering energy stored in the injector solenoids. For the injector power supply to remain fully charged, there must be good ECM battery power and ground, a good engine speed sensor, and good injector circuits.
Component Location:
The injector power supply is located inside the ECM.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine speed is greater than 500 rpm.
Conditions for Setting the Fault Codes:
The ECM detects that the measured injector power supply voltage is lower than the commanded injector power supply voltage.
Action Taken When the Fault Code is Active:
The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code:
The ECM will turn off the amber CHECK ENGINE light immediately after the keyswitch is cycled.
Shop Talk:
- Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
- This fault code will become active when the engine is running, the primary engine speed sensor signal is present, the battery charge is above a minimum threshold, and, at the same time, the measured injector power supply voltage is lower than the commanded injector power supply voltage.
- This fault code will become inactive whenever the keyswitch is turned on.
- This fault code will become inactive whenever the engine is running and measured injector power supply voltage reaches the commanded injector power supply voltage.
Read More:
SPN 110 - FMI 2 (Fault Code 334)
SPN 629 - FMI 12 (Fault Code 343)
Blog.Teknisi
0 Response to "SPN 627 - FMI 12 (Fault Code 351)"
Post a Comment