10.12
MISCELLANEOUS DIGITAL OUTPUT FAULT
10.12 MISCELLANEOUS DIGITAL OUTPUT FAULT
This section is designed to diagnose an output fault (feature not functioning). Since all outputs
operate in the same manner, this troubleshooting section can be used regardless of the function
assigned.
10.12.1 DDEC ECM
The DDEC ECM has six available digital output cavities. Three are located at the engine harness
connector and three at the vehicle harness connector. Output functions (features) are assigned
(programmed with the programming station) to any available cavity. The ECM switches the
cavity to battery (-) to allow the function to activate. Some output activation is dependent on other
parameters being met. (e.g. minimum, r/min, etc.) Perform the following steps to check the DDR
for codes. Available output cavities are listed in Table 10-14.
Additional outputs could be added at a later date. Available functions are listed in Table 10-15.
Output Cavities
Output Cavities
VIH
ESH
A1
#988
W3
#563
A2
#555
X3
#564
F3
#499
Y3
#565
Table 10-14
Output Cavities
Functions
Functions
Functions
No Function
Fan Control #2
Turbo Recirc Valve
Low DDEC Volt
Deceleration Light
Optimized Idle Active
RPM Sync Active
Engine Brake Active
Low Range Solenoid (ESS)
PGS Active Light
VSG Active Indication
High Range Solenoid (ESS)
Vehicle Power Down
Oil Pressure Low Light
Shift Solenoid (Top2)
Starter Lockout
Oil Temp High Light
Shift Lockout (Top2)
Ext Brake Enable
Coolant Temp High Light
Gas Throttle Actuator
Trans Retarder Enable
Air Comp Solenoid
Fuel Supply Solenoid
Coolant Level Low Light
Crankcase Pressure High
KD Brake Solenoid
Cruise Active Light
Coolant Pressure Low
-
Fan Control #1
Ether Start
-
Table 10-15
Available Output Functions
10.12.2 Activate Output
Perform the following steps to attempt activation to troubleshoot an output fault.
All information subject to change without notice.
10-50
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
