Service manual

G420F(FE) Service Manual Chapter 9. Advanced Diagnostics 292
Table 2. Diagnostic Fault Codes (Flash Codes) cont’d.
DFC PROBABLE FAULT FAULT ACTION *
CORRECTIVE ACTION
FIRST CHECK
272
TPS2AdaptHiMin
Learned WOT end of TPS2
sensor range lower than
expected
None N/A
281
TPS1AdaptLoMax
Learned closed throttle end
of TPS1 sensor range higher
than expected
None N/A
282
TPS2AdaptLoMax
Learned closed throttle end
of TPS2 sensor range higher
than expected
None N/A
291
TPS_Sensors_Conflict
TPS sensors differ by more
than expected amount
NOTE: The TPS is not a
serviceable item and can
only be repaired by replacing
the DV-EV throttle assembly.
(1) TurnOnMil
(2) Engine Shutdown
Perform checks for DFCs 241 & 242
331
(33)
MAPTimeRangeLow
Manifold Absolute Pressure
sensor input is low, normally
set if the TMAP pressure
signal wire has been
disconnected or shorted to
ground or the circuit has
opened to the SECM
None
Check TMAP connector and MAP
signal wiring for an open circuit TMAP
Pin 4 to SECM Pin B18 (signal)
TMAP Pin 1 to SECM Pin B1 (sensor
GND)
TMAP Pin 3 to SECM Pin B24 (XDRP
+5 Vdc)
Check the MAP sensor by
disconnecting the TMAP connector and
measuring at the sensor:
TMAP Pin 1(GND) to Pin 4 (pressure
signal KPA) (2.4k - 8.2k )
TMAP Pin 3 (power) to Pin 4 (pressure
signal KPA) (3.4k - 8.2k )
332
MAPRangeLow
Manifold Absolute Pressure
sensor input is low, normally
set if the TMAP pressure
signal wire has been
disconnected or shorted to
ground or the circuit has
opened to the SECM
(1) TurnOnMil
(2) CutThrottle
Check TMAP connector and MAP
signal wiring for an open circuit TMAP
Pin 4 to SECM Pin B18 (signal)
TMAP Pin 1 to SECM Pin B1 (sensor
GND)
TMAP Pin 3 to SECM Pin B24
(XDRP +5 Vdc)
Check the MAP sensor by disconnect-
ing the TMAP connector and
measuring at the sensor:
TMAP Pin 1(GND) to Pin 4 (pressure
signal KPA) (2.4k - 8.2k)
TMAP Pin 3 (power) to Pin 4 (pressure
signal KPA) (3.4k - 8.2k)
(*) Fault actions shown are default values specified by the OEM.