Table 2-1. DDEC II System Code Index (CONT).

TM 9-2320-364-34-1

2-8. TROUBLESHOOTING INSTRUCTIONS (CONT).

Table 2-1. DDEC II System Code Index (CONT).

Code

Affected

Number

Description

Sensor

ECM FAILURE - The DDEC ECM was unable to correctly

convert sensor voltages into numbers for computer usage.

EEPROM ERROR - An error has been detected in the

EEPROM inside the DDEC ECM which affects the logging

of trouble codes.

ECM FAILURE - The DDEC ECM was unable to correctly

convert sensor voltages into numbers for computer usage.

61 thru 68

RESPONSE TIME TOO LONG - The response time of the

injector was longer than the maximum limit or the injector

never responded at all. Oil temperature must be greater

than 30 degrees C and battery voltage must be between 11

volts and 16 volts to log this code. The code is only logged

at less than 2000 RPM.

71 thru 78

RESPONSE TIME TOO SHORT - The response time of the

injector was shorter than the minimum limit. Oil

temperature must be greater than 30 degrees C and battery

voltage must be between 11 volts and 16 volts to log this

code. The code is only logged at less than 2000 RPM.

(b)

When the reader powers up, observe the data readout window. It will remain on for several seconds.

If the reader does not power up, check connections and be sure the ENGINE switch is ON.

MPSI PRO - LINK 9000

SOFTWARE COPYRIGHT

1989-91 VERSION 3.0

DDEC I AND DDEC II

Data Readout Window

(c)

Observe the data readout window displaying a second message indicating communication with the

DDEC Electronic Control Module (ECM). If needed, press ENTER on the DDR to display the

screen.

(d)

After a few seconds, the first four lines in a data list will appear on the screen.

(e)

Use the UP and DOWN arrow keys to move through the list. The first four lines appear as follows:

ACTIVE CODES

YES

HISTORIC CODE

YES

ENGINE RPM

xxxx

ECM VOLTAGE

xxx

Data Readout Window

(f)

If, at any time, you observe a NO DATA message on the screen, check the cable connector and ensure

the ENGINE switch is ON. Lastly, troubleshoot the DDEC ECM (Para 2-13).

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