Service manual

G420F(FE) Service Manual Chapter 9. Advanced Diagnostics 301
Table 2. Diagnostic Fault Codes (Flash Codes) cont’d.
DFC PROBABLE FAULT FAULT ACTION *
CORRECTIVE ACTION
FIRST CHECK
711
(71)
LSDFault_Dither1
Dither Valve 1 Fault, signal
has opened or shorted to
ground or power or defective
dither 1 valve
TurnOnMil
Check FTV1 for an open wire or FTV
connector being disconnected FTV1
Pin 1 (signal) to SECM Pin A1
FTV1 Pin 2 (power) to SECM (DRVP)
Pin A23 Check
FTV1 for an open coil by disconnecting
the FTV connector and measuring the
resistance (~26  ± 2  )
712
LSDFault_Dither2
Dither Valve 2 Fault, signal
has opened or shorted to
ground or power or defective
dither 2 valve
TurnOnMil
Check FTV1 for an open wire or FTV
connector being disconnected or signal
shorted to GND
FTV2 Pin 1 (signal) to SECM Pin A2
FTV2 Pin 2 (power) to SECM (DRVP)
Pin A23 Check
FTV1 for an open coil by disconnecting
the FTV connector and measuring the
resistance (~26  ± 2  )
714
LSDFault_CheckEngine
Check Engine Lamp Fault,
signal has opened or shorted
to ground or power or
defective check engine lamp
None
Check ‘Check Engine Lamp’ for an
open wire or shorted to GND
715
LSDFault_CrankDisable
Crank Disable Fault, signal
has opened or shorted to
ground or power or defective
crank disable relay
None N/A
717
LSDFault_LockOff
Fuel lock off Valve Fault,
signal has opened or shorted
to ground or power or
defective Fuel lock off valve
TurnOnMil
Check fuel lock off valve for an open
wire or connector being disconnected
or signal shorted to GND
Lockoff Pin B (signal) to SECM Pin
A11 Lockoff Pin A (power) to SECM
(DRVP) Pin A23 Check CSV for an
open coil by disconnecting the CSV
connector and measuring the
resistance (~26  ± 3 )
718
LSDFault_MIL
Malfunction Indicator Lamp
Fault, signal has opened or
shorted to ground or power
or defective MIL lamp
None
Check MIL lamp for an open wire or
short to GND.
721
(72)
GasFuelAdaptRangeLo
In LPG mode, system had to
adapt rich more than
expected
TurnOnMil
Check for vacuum leaks. Check fuel
trim valves, e.g. leaking valve or hose
Check for missing orifice(s).
(*) Fault actions shown are default values specified by the OEM.