TROUBLESHOOTING CHARTS

TM 9-2320-364-20-1

2-14. DDEC III/IV TROUBLESHOOTING (CONT).

Section IV. TROUBLESHOOTING CHARTS (Cont.)

FLASH CODE:

DDR DISPLAY:

COOLANT TEMP SENSOR INPUT VOLTAGE HIGH

SAE J1587 CODE:

PID: 110 FMI: 3

Indicates that the engine Coolant Temperature Sensor (CTS) 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:

DDR DISPLAY:

OIL TEMP SENSOR INPUT VOLTAGE HIGH

SAE J1587 CODE:

PID: 175 FMI: 3

Indicates that the engine Oil Temperature Sensor (OTS) 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:

DDR DISPLAY:

COOLANT TEMP SENSOR INPUT VOLTAGE LOW

SAE J1587 CODE:

PID: 110 FMI: 4

Indicates that the engine Coolant Temperature Sensor (CTS) 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:

DDR DISPLAY:

OIL TEMP SENSOR INPUT VOLTAGE LOW

SAE J1587 CODE:

PID: 175 FMI: 4

Indicates that the engine Oil Temperature Sensor (OTS) 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:

DDR DISPLAY:

THROTTLE SENSOR INPUT VOLTAGE HIGH

SAE J1587 CODE:

PID: 91 FMI: 3

Indicates that the Throttle Position Sensor (TPS) 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

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