G420E/G424E
Tier
LP Engine
Advanced Diagnostics
56
Table a. MI-04 Diagnostic Fault Codes (Flash Codes)
DFC
Probable Fault
Action
Corrective Action, First Check
56 XDRPSensorInputHigh
+5VDC Transducer power supplied
by the SECM to the sensors is above
+5.20VDC
Engine Shutdown
Measure transducer power at the
TMAP connector with a multimeter
TMAP PIN 3 +5VDC to TMAP PIN 1
XDCR GND
Verify transducer power at the SECM
with a multimeter
SECM PIN 18 +5VDC to SECM PIN
1 XDCR GND
Verify transducer power at ETC with
a multimeter
ETC PIN 3 XDCR PWR to ETC PIN
2 XDCR GND
Verify transducer power to the
Acceleration Pedal with a multimeter
57 Engine
OverSpeed
Engine RPM increased beyond
maximum RPM set point
Engine Shutdown
Usually associated with additional
ETC faults
z
Check for ETC Sticking or other
ETC faults
z
Verify if the lift truck was motored
down a steep grade
61 Pedal1SensorInputLo
APP1 signal disconnected, open
circuit or sensor malfunction
(Expected faults when APP connector
is unplugged
CODES: 61 & 66)
MIN Power Limit
Check Acceleration Pedal connector
z
Check APP1 signal at
SECM
PIN 15
62 Pedal1SensorInputHi
APP1 sensor failure or shorted circuit
MIN Power limit
Check Acceleration Pedal connector
z
Check APP1 signal at
SECM
PIN 15
63 Pedal1SensorRangeLo
APP1 potentiometer malfunction.
Improper APP1 reading may be due
to dirt or oxidation on the sensor
traces.
Stored Fault Code
(MIL Only)
Check Acceleration Pedal connector
z
Cycle the pedal several times
and check APP1 signal at SECM
PIN 15
64 Pedal1SensorRangeHi
APP1 potentiometer malfunction.
Improper APP1 reading may be due
to dirt or oxidation on the sensor
traces
Stored Fault Code
(MIL Only)
Check Acceleration Pedal connector
z
Cycle the pedal several times
and check APP1 signal at SECM
PIN 15
