TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
FLASH CODE:
86
DDR DISPLAY:
PUMP PRESS SENSOR INPUT VOLTAGE HIGH
SAE J1587 CODE:
PID: 073 FMI: 3
Indicates that the External Fire Truck Water Pressure Sensor input to the ECM has exceeded 95% (normally > 4.75
volts) of the sensor supply voltage. This diagnostic condition is typically:
(1)
open sensor return circuit
(2)
sensor signal circuit is shorted to the sensor +5 volt supply
FLASH CODE:
86
DDR DISPLAY:
BARO PRESS SENSOR INPUT VOLTAGE HIGH
SAE J1587 CODE:
PID: 108 FMI: 3
Indicates that the Barometric Pressure Sensor input to the ECM has exceeded 95% (normally > 4.75 volts) of the
sensor supply voltage. This diagnostic condition is typically:
(1)
open sensor return circuit
(2)
sensor signal circuit is shorted to the sensor +5 volt supply
FLASH CODE:
87
DDR DISPLAY:
PUMP PRESS SENSOR INPUT VOLTAGE LOW
SAE J1587 CODE:
PID: 073 FMI: 4
Indicates that the External Fire Truck Water Pressure Sensor input to the ECM has dropped below 5% (normally <
0.25 volts) of the sensor supply voltage. This diagnostic condition is typically:
(1)
open sensor signal circuit
(2)
open sensor +5 volt supply circuit
(3)
sensor signal is shorted to the sensor return circuit or to ground
(4)
sensor +5 volt supply is shorted to sensor return circuit
FLASH CODE:
87
DDR DISPLAY:
BARO PRESS SENSOR INPUT VOLTAGE LOW
SAE J1587 CODE:
PID: 108 FMI: 4
Indicates that the Barometric Pressure Sensor input to the ECM has dropped below 5% (normally < 0.25 volts) of the
sensor supply voltage. This diagnostic condition is typically:
(1)
open sensor signal circuit
(2)
open sensor +5 volt supply circuit
(3)
sensor signal is shorted to the sensor return circuit or ground
(4)
sensor +5 volt supply is shorted to sensor return circuit
FLASH CODE:
88
DDR DISPLAY:
COOLANT PRESSURE LOW
SAE J1587 CODE:
PID: 109 FMI: 1
Indicates that the Coolant Pressure Sensor has detected that the engine coolant pressure has dropped below the
recommended safe operating range.
FLASH CODE:
--
DDR DISPLAY:
FRAM CHECKSUM INCORRECT
SAE J1587 CODE:
SID: 240 FMI: 2
Indicates that the ECM system operation software has been corrupted and is unable to operate. This diagnostic
condition is typically:
(1)
The ECM system programming operation failed to run to completion
Change 3 3-345.37