SPN 1043 - FMI 4 (Fault Code 284)
Friday, August 03, 2018
Fault Codes CUMMINS ISB ISBe QSB4.5 QSB5.9 QSB6.7 ISC QSC8.3 ISL ISLe QSL9 CM850 (CM2850)
SPN1043 FMI4
Engine Speed/Position Sensor (Crankshaft) Supply Voltage Circuit - Voltage Below Normal or Shorted to Low Source
CODES:
Fault Code: 284
PID(P), SID(S): S221
SPN: 1043
FMI: 4/4
Lamp: Amber
REASON: Engine Speed/Position Sensor (Crankshaft) Supply Voltage Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected on the ECM voltage supply line to engine
speed sensor.
EFFECT: Possible hard starting and rough running.
Circuit Description:
The engine speed voltage supply provides +5 VDC for the engine speed sensor. If the supply wire to this sensor is damaged, the sensor will not work properly.
Component Location:
The engine speed sensor is located on the intake side of the engine between number 5 and number 6 cylinders at the crankshaft level. Refer to Procedure 100-002 for detailed component view location.
Shop Talk:
Low voltage on the +5 VDC supply line can be caused by a short circuit to ground in a supply line, a short circuit between a supply line or a return line, a failed sensor, or a failed ECM power supply.
Read More:
SPN 1347 - FMI 7 (Fault Code 275)
SPN 1347 - FMI 7 (Fault Code 281)
Blog.Teknisi
Engine Speed/Position Sensor (Crankshaft) Supply Voltage Circuit - Voltage Below Normal or Shorted to Low Source
 |
| Engine Speed Sensor Circuit |
CODES:
Fault Code: 284
PID(P), SID(S): S221
SPN: 1043
FMI: 4/4
Lamp: Amber
REASON: Engine Speed/Position Sensor (Crankshaft) Supply Voltage Circuit - Voltage Below Normal or Shorted to Low Source. Low voltage detected on the ECM voltage supply line to engine
speed sensor.
EFFECT: Possible hard starting and rough running.
Circuit Description:
The engine speed voltage supply provides +5 VDC for the engine speed sensor. If the supply wire to this sensor is damaged, the sensor will not work properly.
Component Location:
The engine speed sensor is located on the intake side of the engine between number 5 and number 6 cylinders at the crankshaft level. Refer to Procedure 100-002 for detailed component view location.
Shop Talk:
Low voltage on the +5 VDC supply line can be caused by a short circuit to ground in a supply line, a short circuit between a supply line or a return line, a failed sensor, or a failed ECM power supply.
Read More:
SPN 1347 - FMI 7 (Fault Code 275)
SPN 1347 - FMI 7 (Fault Code 281)
Blog.Teknisi
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