TM 9-2320-365-20-2
2-1888
NO
YES
Is continuity present from
PX7-17 to ground?
KNOWN INFO
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.
POSSIBLE PROBLEMS
TEST OPTIONS
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.
Overspeed indicator
LED OK.
8.
Continuity Test or
STE/ICE-R Test #91
REASON FOR QUESTION
CTIS overspeed indicator
requires continuity from
PX7-17 to ground.
Repair wire 3130 (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)
