S057 3/4 - PWM SHORT TO BATTERY/PWM OPEN CIRCUIT

TM 9-2320-364-20-1

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

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

J1587 CODE:

S057 3/4 - PWM SHORT TO BATTERY/PWM OPEN CIRCUIT

NOTE - This chart is only to be used if:

1) All basic mechanical checks and physical inspections have been performed with no problem found; and,

2) Diagnosis of DDEC III/IV was started at step START-1, pg 2-539, and you have now been referred here.

STEP/SEQUENCE

Determine SAE Codes

57-3

PWM #1

Short to battery (ckt 908).

57-4

PWM #1

Open circuit (ckt 908).