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
0172-04 Intake Manifold Air
3. Disconnect the intake manifold
Temperature Sensor Voltage
temperature sensor EA-C8 (WP
Below Normal - Continued
0009, Figure 23 harness connec-
tor.
4. Turn the ignition switch to the ON
position.
N OT E
Wait at least 30 seconds in order for diagnostic codes to become active.
5. Using MSD (WP 0006), select
0172 -03 Becomes Active - Sensor
Engine ECM C6.6 120M, and
faulty, replace intake manifold
check if diagnostic code 0172-03
temperature sensor (WP 0105).
is active.
0172 -04 Remains Active - Proceed
to step 6.
6. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
7. Disconnect Engine ECM harness
connector EA-C1 (WP 0009, Fig-
ure 3) from Engine ECM J2.
8. Using a digital multimeter, test
Continuity - Engine control wiring
continuity at ECM harness con-
harness is shorted, replace engine
nector EA-C1 (WP 0009, Figure
control wiring harness (WP 0080).
3) between terminal 42 and all
No Continuity - ECM faulty, replace
other terminals of EA-C1.There
Engine ECM (WP 0067).
should be no continuity.
Connect the intake manifold tempera-
ture sensor EA-C8 (WP 0009,
Figure 23 harness connector.
0190-08 Engine Speed Sen-
System Response:
sor Abnormal Frequency,
A warning will appear on instru-
Pulse Width, or Period
ment panel and diagnostic code
will be logged.
ECM will use signal from second-
ary speed/timing sensor.
N OT E
If the signal from the secondary speed/timing sensor is also lost, the
engine will shut down.
ECM will use signal from se ondary speed/timing sensor.
c
Possible Performance Effect:
Low Power
0011-106