Page 712 - Workshop Manual - Tunland (2017)
P. 712
04-26 DIAGNOSTICS - ENGINE CONTROL SYSTEM
04
Failure code Diagnostic items (DTC definition) Trouble location
• Fuel hydrous sensor
• Wiring harness, joint or sensor loop
Fuel water indicator circuit - voltage or signal circuit is open
P428 is above normal or shorted to high
• Signal wire is shorted to sensor
voltage power supply
power or battery voltage
• ECM
• Fuel hydrous sensor
• Wiring harness, joint or sensor loop
Fuel hydrous indicator circuit - volt-
or signal circuit is open
P429 age is below normal or shorted to low • Signal wire is shorted to sensor
voltage power supply
power or battery voltage
• ECM
• Oil pressure switch
• Oil pressure switch connector is
Engine oil rail pressure - Data is un-
P435 out of contact, the harness is open
stable, intermittent or incorrect
or shorted
• ECM
• Battery harness or ECM connector
Battery 1 voltage - data is valid but is out of contact, the harness is
P441 below normal operating range -
open or shorted
medium severity level
• ECM
Battery 1 voltage - data is valid but • Battery
P442 above normal operating range - • Generator and its harness
medium severity level • ECM
• Oil rail pressure sensor
Fuel injector metering oil rail 1 pres-
• Oil rail pressure sensor connector
sure sensor circuit - voltage is above
P451 is iin poor contact, the harness is
normal or shorted to high voltage
open or shorted
power supply
• ECM
• Oil rail pressure sensor
Fuel injector metering oil rail 1 pres-
• Oil rail pressure sensor connector
sure sensor circuit - voltage is below
P452 is iin poor contact, the harness is
normal or shorted to high voltage
open or shorted
power supply
• ECM
• The engine harness or OEM output
Auxiliary input / output 2 circuit - controls solenoid valve is open
P527 voltage is above normal or shorted • OEM harness is shorted to power
to low voltage power supply supply
• ECM
Fuel injector metering oil rail 1 pres- • Oil rail pressure sensor
P553
sure- data is valid but above normal • Fuel pump actuator
