TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
20. TRANSIT VALVES INOPERATIVE, ERROR CODE 19, (MODEL B ONLY)
(continued).
NOTE
The digital controller and the cab control box are not repairable,
therefore, it is necessary to test the digital controller and cab
interface wiring harnesses, switches, solenoids, and other com-
ponents to identify possible faults other than the digital controller
and the digital cab controller.
4.
KNOWN INFO
TEST OPTIONS
Error Code, EC 01 and/or
Is the resistance of the
Transit Valve Solenoid
EC 19.
transit valve solenoids
Test.
Cab digital control box
3947 ohms?
REASON FOR QUESTION
OK.
Cab interface wiring
Resistance less than or
harness OK.
greater than the specifica-
Digital controller wiring
tion indicates a faulty
harness OK.
transit valve solenoid.
POSSIBLE PROBLEMS
Transit valves faulty.
Digital control box faulty.
Repair or replace
transit valve(s)
NO
YES
If all previous
tests were
completed with a
satifactory result,
replace digital
control box (para
4-414.16
30
Change 1
