Service manual

G420F(FE) Service Manual Chapter 9. Advanced Diagnostics 285
Table 1. Fault List Definitions (cont’d.)
FAULT DESCRIPTION
CODE
(MI04 CODE)
LSDFault_CheckEngine
Check Engine Lamp Fault, signal has opened or shorted to
ground or power or defective check engine lamp
714
LSDFault_CrankDisable
Crank Disable Fault, signal has opened or shorted to ground or
power or defective crank disable relay
715
LSDFault_Dither1
Dither Valve 1 Fault, signal has opened or shorted to ground or
power or defective dither 1 valve
711
(71)
LSDFault_Dither2
Dither Valve 2 Fault, signal has opened or shorted to ground or
power or defective dither 2 valve
712
LSDFault_FuelPump
Fuel Pump Fault, signal has opened or shorted to ground or
power or defective fuel pump
716
LSDFault_LockOff
Fuel lock off Valve Fault, signal has opened or shorted to ground
or power or defective Fuel lock off valve
717
LSDFault_MIL
Malfunction Indicator Lamp Fault, signal has opened or shorted
to ground or power or defective MIL lamp
718
LiqFuelAdaptRangeHi In Gasoline mode, system had to adapt rich more than expected 821
LiqFuelAdaptRangeLow In Gasoline mode, system had to adapt lean more than expected 831
LiqO2FailedLean
Pre-catalyst O2 sensor indicates extended lean operation on
gasoline
851
LiqO2FailedRich
Pre-catalyst O2 sensor indicates extended rich operation on
gasoline
871
LiqO2NotActive
Pre-catalyst O2 sensor inactive on gasoline, open O2 sensor
signal or heater leads, defective O2 sensor
841
LiqPostO2FailedRich
Post-catalyst O2 sensor control on gasoline has reached rich
limit and sensor still reads to lean. This could be caused by
oxygen leak before or just after sensor, catalyst failure, sensor
failure, or wiring/relay failure causing the sensor to not be
properly heated. If any Pre-O2 sensor faults are set, diagnose
these first and after correcting these faults recheck if this fault
sets.
872
LiqPostO2FailedLean
Post catalyst O2 sensor control on gasoline has reached lean
limit and sensor still reads to rich. This could be caused by
catalyst failure, sensor failure, or wiring/relay failure causing the
sensor to not be properly heated. If any Pre O2 sensor faults are
set, diagnose these first and after correcting these faults recheck
if this fault sets.
852