Table 2-1. DDEC II System Code Index

TM 9-2320-364-34-1

Table 2-1. DDEC II System Code Index

Code

Affected

Description

Number

Sensor

Vernier Control

System on for 2 seconds with too low a voltage at the Vernier

Control input to the DDEC ECM.

Vernier Control

System on for 2 seconds with too high a voltage at the

Vernier Control input to the DDEC ECM.

Oil Temperature (OTS)

Engine running for 8 minutes with too high a voltage at the

OTS input to the DDEC ECM.

Oil Temperature (OTS)

Engine running for 2 seconds with too low a voltage at the

OTS input to the DDEC ECM.

Throttle Position (TPS)

System running for 2 seconds with too high a voltage at the

TPS input to the DDEC ECM.

Throttle Position (TPS)

System running for 2 seconds with too low a voltage at the

TPS input to the DDEC ECM.

Fuel Temperature (FTS)

Engine running for 8 minutes with too high a voltage at the

FTS input to the DDEC ECM.

Fuel Temperature (FTS)

Engine running for 2 seconds with too low a voltage at the

FTS input to the DDEC ECM.

NO CODES - No faults have been detected by DDEC since

the last time the codes were cleared.

ECM FAILURE - The backup system inside the DDEC ECM

has failed.

Turbo Boost (TBS)

Engine running (at less than 800 RPM or less than 30% of

maximum torque) for 5 seconds with too high a voltage at

the TBS input to the DDEC ECM.

Turbo Boost (TBS)

Engine running for 2 seconds with too low a voltage at the

TBS input to the DDEC ECM.

Oil Pressure (OPS)

Engine running for 2 seconds at less than 800 RPM with too

high a voltage at the OPS input to the DDEC ECM. Oil

temperature must be greater than 60 degrees C to log this

code.

Oil Pressure (OPS)

Engine running for 2 seconds with too low a voltage at the

OPS input to the DDEC ECM.

Timing Reference (TRS)

The number TRS pulses received per revolution was

incorrect or completely missing. One pulse per cylinder per

revolution is required.

Synchronous Reference (SRS)

Did not receive an SRS pulse on every firing of the #1

cylinder.

HIGH OIL TEMPERATURE - System running for 2 seconds

with the oil temperature greater than a calibrated limit.

LOW OIL PRESSURE - Engine running with the oil pressure

less than the limit (different limits at different RPM's) for 7

seconds.

LOW BATTERY VOLTAGE - Engine running with low

battery voltage (less than 10 volts) for more than 30 seconds.

EEPROM ERROR - An error has been detected in the

EEPROM (Electrically Erasable, Programmable, Read Only

Memory) inside the DDEC ECM.

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