TM 9-2320-365-20-2
2-1882
NO
YES
Is 24 vdc present on P110E
power input to ECU for
warning light?
CTIS overspeed indicator
will not work without 24
vdc to P110E.
KNOWN INFO
POSSIBLE PROBLEMS
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 breaker OK.
Power supplied to CTIS.
Speedometer OK.
Indicator display lights OK.
CTIS cable-speed signal
OK.
Cab dashboard wiring
harness - speed signal OK.
Cab dashboard wiring
harness - LED input to
CTIS cable OK.
5.
WARNING
Read WARNING
on following page.
Voltage Test or
STE/ICE-R Test #89
Go to step 9 of this fault.
Replace CTIS ECU
(para 12-6).
m6. CTIS OVERSPEED WARNING LIGHT DOES NOT ILLUMINATE AND/OR OVERSPEED PRESSURE CHANGE
(CONT)