TM 1-2840-252-23-3
Fault Codes D0, D3, D6, DA, DB, DD Internal DECU Faults
Figure 119
FAULT CODES
D4
+10V DC
D5
+15V SUPPLY
D7
+5V SUPPLY
D8
COLD JUNCTION COMPENSATION
D9
+24V REGULATOR
DC
T4.5 CALIBRATION
DF
WATCHDOG TIMER TEST
1 TURN DECU POWER
OFF. REPLACE DECU.
NOTE: FAULT CODE DF CAN OCCUR AS A RESULT OF A PRE-EXISTING HARD FAULT WHEN THE WATCHDOG
TIMER TEST IS PERFORMED AT POWER-UP. IF DF OCCURS IH CONJUCTION WITH ANOTHER HARD FAULT,
FOLLOW THE PROCEDURE FOR THE OTHER FAULT CODE FIRST.
Faults Codes D4, D5, D7, D8, D9, DC, DF Internal DECU Faults
Figure 120
G-68
