TM 9-2320-365-20-2
2-1880
NO
YES
CTIS overspeed indicator
will not work without 24
vdc to P111D.
KNOWN INFO
POSSIBLE PROBLEMS
Faulty cab dashboard
wiring harness - LED input
to CTIS cable.
Faulty CTIS cable - LED
input to ECU.
Faulty ECU - O.S pressure
change function.
Faulty overspeed indicator
LED.
Faulty cab dashboard
wiring harness - ground
for LED.
Faulty cab dashboard
wiring harness - power
to LED.
Faulty CTIS cable power
to LED.
Faulty ECU - O.S. warning
indicator function.
TEST OPTIONS
REASON FOR QUESTION
Circuit breakers OK.
Power supplied to CTIS.
Speedometer OK.
Indicator display lights OK.
CTIS cable-speed signal
OK.
Cab dashboard wiring
harness - speed signal OK.
4.
Is 24 vdc present on P111D
power input to CTIS
harness for warning light?
WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R Test #89
Repair wire 1793 (para 2-40)
or replace WTEC II dashboard cable
assembly (para 7-10) or WTEC III
dashboard cable assembly (para 7-11).
m6. CTIS OVERSPEED WARNING LIGHT DOES NOT ILLUMINATE AND/OR OVERSPEED PRESSURE CHANGE
(CONT)
