TROUBLESHOOTING CHARTS (Cont.) -726280603

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING CHARTS (Cont.)

FLASH CODE:

DDR DISPLAY:

(AUXILIARY OUTPUT #1) SHORT TO BATTERY (+)

SAE J1587 CODE:

SID: 026 FMI: 3

Indicates that the function (engine brake) assigned to the Auxiliary Output #1 circuit output is shorted to battery

(+). This diagnostic condition is detected when the DDEC III/IV ECM is unsuccessful in turning ON the configur-

able function.

NOTE: The DDR will display the parameter text description in TABLE 2-22 (ECM Output Options) to identify the

function assigned to AUXILIARY OUTPUT #1.

The DDEC III/IV ECM supplies a switched ground to the AUXILIARY OUTPUT #1 circuit to turn ON the

function assigned.

FLASH CODE:

DDR DISPLAY:

(AUXILIARY OUTPUT #1) OPEN CIRCUIT

SAE J1587 CODE:

SID: 026 FMI: 4

Indicates that the function (engine brake) assigned to the Auxiliary Output #1 circuit output is open or is shorted

to ground. This diagnostic condition is detected when the Auxiliary Output #1 function is OFF and the DDEC III/

IV ECM measures a low voltage on the circuit output.

NOTE: The DDR will display the parameter text description in TABLE 2-22 (ECM Output Options) to identify the

function assigned to AUXILIARY OUTPUT #1.

FLASH CODE:

DDR DISPLAY:

PWM DRIVER #1 SHORT TO BATTERY (+)

SAE J1587 CODE:

SID: 057 FMI: 3

Indicates that the PWM DRIVER #1 circuit (transmission modulator) output is shorted to battery (+). This

diagnostic condition is detected when the DDEC III/IV ECM is unsuccessful in turning ON the circuit function.

NOTE: The DDEC III/IV ECM supplies a switched ground to the PWM DRIVER #1 circuit to turn ON the circuit

function.

FLASH CODE:

DDR DISPLAY:

PWM DRIVER #1 OPEN CIRCUIT

SAE J1587 CODE:

SID: 057 FMI: 4

Indicates that the PWM DRIVER #1 circuit (transmission modulator) output is open or is shorted to ground. This

diagnostic condition is detected when the PWM Driver #1 function is OFF and the DDEC III/IV ECM measures a

low voltage on the circuit output.

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