TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 1194 of 1313
TWO PRESSURE MODES INDICATED WITH STEADY MODE LIGHTS - Continued
e.
Connect multimeter red lead to CTIS wiring harness cannon plug pin X.
f.
Connect multimeter black lead to CTIS wiring harness cannon plug pin V.
g.
Meter reading should be between 18 and 26 VDC.
CONDITION/INDICATION
IS THERE BATTERY VOLTAGE BETWEEN PINS X AND V ON CTIS WIRING HARNESS CANNON PLUG AT
ECU?
DECISION
YES - Go to Step (18).
NO - Perform Engine Fails To Crank troubleshooting (WP
0006).
STEP
18.
DOES CTIS SYSTEM OPERATE CORRECTLY AFTER THE ELECTRICAL LEAD IS PROPERLY
CONNECTED TO PRESSURE TRANSDUCER?
a.
Turn battery switch to OFF position.
T0982DAA
PRESSURE
TRANSDUCER
Figure 16.
Pressure Transducer.
b.
Remove electrical lead from pressure transducer at pneumatic controller.
c.
Clean the connectors, then reconnect the lead.
d.
Check CTIS operation.
CONDITION/INDICATION
DOES CTIS SYSTEM OPERATE CORRECTLY AFTER THE ELECTRICAL LEAD IS PROPERLY
CONNECTED TO PRESSURE TRANSDUCER?
DECISION
YES - Go to Step (23) to verify problem is solved.
NO - Go to Step (19).
TM 9-2320-272-23-1
0144
0144-17
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