TM 9-2320-365-20-2
2-1886
NO
YES
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.
Is continuity verified on
indicator display lights
socket 9 to socket 17?
KNOWN INFO
TEST OPTIONS
POSSIBLE PROBLEMS
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.
CTIS cable - LED input
to ECU OK.
ECU - O.S. pressure
change function OK.
7.
Continuity Test or
STE/ICE-R Test #91
REASON FOR QUESTION
CTIS overspeed indicator
will not work if continuity
is not present from indicator
display lights socket 9 to
socket 17.
Replace lighted indicator
display (para 7-16).
m6. CTIS OVERSPEED WARNING LIGHT DOES NOT ILLUMINATE AND/OR OVERSPEED PRESSURE CHANGE
(CONT)