TM 5-3805-293-23-1
0011
Table 2. Engine Troubleshooting with Codes for the 120M Motor Grader - Continued.
CDI FMI CODE
ERROR/EVENT
CORRECTIVE ACTION
0100-04 Engine Oil Pres-
4. Disconnect the engine oil pres-
sure Sensor Voltage Below
sure sensor harness connector
Normal - Continued
EA-C5 (WP 0009, Figure 19).
5. Start and run the engine.
N OT E
Wait at least 30 seconds in order for diagnostic codes to become active.
6. Using MSD (WP 0006), select
0100-04 Remains Active - Proceed
Engine ECM C6.6 120M, and
to step 7.
check if diagnostic code 0100-03
0100-03 Becomes Active - Sensor is
is active.
faulty, replace engine oil pressure
sensor (WP 0104).
7. Using a digital multimeter, mea-
Voltage OK (4.84 - 5.16 Volts) - 5-
sure for voltage between engine
Volt supply circuit L730-OR and
oil pressure sensor harness con-
Engine ECM test OK, proceed to
nector EA-C5 (WP 0009, Figure
step 8.
19) terminal 1 and ground.
Voltage NOT OK - Proceed to Test
Step 2.
Voltage should be within 4.84 - 5.16
Volts.
8. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
9. Disconnect harness connector
EA-C1 (WP 0009, Figure 3) from
Engine ECM J.
10. Using a digital multimeter, mea-
Continuity - Engine control wiring
sure continuity between harness
harness is shorted, replace engine
connector EA-C5 (WP 0009, Fig-
control wiring harness (WP 0080).
ure 19) terminal 3, and all other
No Continuity - Proceed to step 11.
EA-C5 terminals, and ground.
There should be no continuity.
11. Install a jumper wire between
engine oil pressure sensor har-
ness connector EA-C5 (WP 0009,
Figure 19) terminal 3 and terminal
2.
12. Using a digital multimeter, test for
Continuity - (Resistance should be
continuity between Engine ECM
less than 5.0 Ohms) - Engine control
harness connector EA-C1 (WP
wiring harness tests OK. Engine ECM
0009, Figure 3) terminal 56 and
faulty, replace Engine ECM (WP
terminal 39.
0067).
No Continuity - Engine control wiring
harness is open, replace engine con-
trol wiring harness (WP 0080).
Change 1
0011-82
