TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
FLASH CODE:
22
DDR DISPLAY:
THROTTLE SENSOR INPUT VOLTAGE LOW
SAE J1587 CODE:
PID: 91 FMI: 4
Indicates that the Throttle Position Sensor (TPS) 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 sensor return circuit or to ground
(4)
sensor +5 volt supply is shorted to the sensor return circuit or ground
FLASH CODE:
23
DDR DISPLAY:
FUEL TEMP SENSOR INPUT VOLTAGE HIGH
SAE J1587 CODE:
PID: 174 FMI: 3
Indicates that the engine Fuel Temperature Sensor (FTS) input to the ECM has exceeded 95% (normally > 4.75
volts) of the sensor supply voltage. NOTE: This code will only be logged during warm engine operation. This
diagnostic condition is typically:
(1)
open sensor signal circuit
(2)
open sensor return circuit
(3)
sensor signal circuit is shorted to the sensor +5 volt supply
FLASH CODE:
24
DDR DISPLAY:
FUEL TEMP SENSOR INPUT VOLTAGE LOW
SAE J1587 CODE:
PID: 174 FMI: 4
Indicates that the engine Fuel Temperature Sensor (FTS) input to the ECM has dropped below 5% (normally < 0.25
volts) of the sensor supply voltage. This diagnostic condition is typically:
(1)
sensor signal circuit is shorted to sensor return or to ground
(2)
sensor +5 volt supply is shorted to sensor return circuit or to ground
FLASH CODE:
26
DDR DISPLAY:
AUX ENG SHUTDOWN #1 INPUT ACTIVE
SAE J1587 CODE:
PID: 25 FMI: 11
Indicates that the Auxiliary Engine Shutdown #1 switch input to the ECM is active. The active switch input
represents a low (grounded) external input circuit to the ECM.
FLASH CODE:
26
DDR DISPLAY:
AUX ENG SHUTDOWN #2 INPUT ACTIVE
SAE J1587 CODE:
PID: 61 FMI: 11
Indicates that the Auxiliary Engine Shutdown #2 switch input to the ECM is active. The active switch input
represents a low (grounded) external input circuit to the ECM.
FLASH CODE:
27
DDR DISPLAY:
AIR TEMP SENSOR INPUT VOLTAGE HIGH
SAE J1587 CODE:
PID: 172 FMI: 3
Indicates that the engine Air Temperature Sensor (ATS) input to the ECM has exceeded 95% (normally > 4.75 volts)
of the sensor supply voltage. NOTE: This code will only be logged during warm engine operation. This diagnostic
condition is typically:
(1)
open sensor signal circuit
(2)
open sensor return circuit
(3)
sensor signal circuit is shorted to the sensor +5 volt supply
3-345.22 Change 3
