Operation Section
74
Table 2. Diagnostic Fault Codes (Flash Codes) cont’d.
DFC
PROBABLE FAULT
FAULT ACTION *
CORRECTIVE ACTION FIRST CHECK
551
(55)
SensVoltRangeLow
Sensor reference voltage
XDRP too low
(1) TurnOnMil
(2) EngineShutdown
Measure transducer power at the
TMAP connector with a multimeter
TMAP Pin 3 XDRP +5 Vdc to
TMAP Pin 1 XDRG GND
Verify transducer power at the
SECM with a multimeter
SECM Pin B24 +5 Vdc to SECM
Pin B1 XDRG GND
Verify transducer power at
ETC with a multimeter
ETC Pin 3 XDRP PWR to ETC Pin 2 XDRG
GND
Verify transducer power to the foot pedal with a
multimeter.
561
(56)
SensVoltRangeHigh
Sensor reference voltage
XDRP too high
(1) TurnOnMil
(2) EngineShutdown
Measure transducer power at the
TMAP connector with a multimeter
TMAP Pin 3 XDRP +5 Vdc to
TMAP Pin 1 XDRG GND
Verify transducer power at the
SECM with a multimeter
SECM Pin B24 +5 Vdc to
SECM Pin B1 XDRG GND
Verify transducer power at ETC with a
multimeter
ETC Pin 3 XDRP PWR to ETC Pin 2 XDRG
GND
Verify transducer power to the foot pedal with a
multimeter.
571
(57)
HardOverspeed
Engine speed has
exceeded the third level (3
of 3) of overspeed
protection
(1) TurnOnMil
(2) HardRevLimit
Usually associated with additional ETC faults
•
Check for ETC Sticking or other ETC faults
Verify if the lift truck was motored down a steep
grade
572
MediumOverspeed
Engine speed has
exceeded the second level
(2 of 3) of overspeed
protection
(1) TurnOnMil
(2) MediumRevLimit
Usually associated with additional ETC faults
•
Check for ETC Sticking or other ETC faults
Verify if the lift truck was motored down a steep
grade
573
SoftOverspeed
Engine speed has
exceeded the first level (1
of 3) of overspeed
protection
(1) TurnOnMil
(2) SoftRevLimit
Usually associated with additional ETC faults
•
Check for ETC Sticking or other ETC faults
Verify if the lift truck was motored down a steep
grade
611
(61)
APP1RangeLow
APP1 sensor voltage out
of range low, normally set
if the APP1 signal has
shorted to ground, circuit
has opened or sensor has
failed
(1) TurnOnMil
(2)
CheckEngineLight
Check foot pedal connector
•
Check APP1 signal at SECM PIN B7
(*) Fault actions shown are default values specified by the OEM.
