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
0190-08 Engine Speed Sen-
Test Step 1. Test Signal Circuit.
sor Abnormal Frequency,
N OT E
Pulse Width, or Period -
Continued
Always inspect the harness connectorsthat are involved in the circuit.
Poor connections can often be the cause of a problem in an electrical
circuit. Verify that all connections in the circuit are clean and secure,
and that all connections are in good condition. If a problem with a
connection is found, correct the problem and verify that this diagnostic
code is active before performing this procedure.
Perform open or short circuit test ateach harness connection to identify
correct harness to replace.
Perform this test only if condition is active.
1. Connect MSD (WP 0006). Select
Engine ECM C6.6 120M.
2. Start and run the engine and ver-
ify 0190-08 is active.
3. Turn the ignition switch to the
OFF position.
4. Disconnect EA-C3 (WP 0009,
Figure 12) harness connector
from the secondary engine speed
sensor.
5. Turn the ignition switch to the ON
position.
6. Using a digital multimeter, mea-
Voltage OK (7.2 - 8.8 volts) -
sure the voltage between EA-C3
Proceed to step 7.
(WP 0009, Figure 12) harness
Voltage Less Than 7.2 Volts-
connector terminal 1, and ground.
Proceed to Test Step 2.
Voltage should be 8.0 0.8 volts.
7. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
8. Disconnect Engine ECM harness
connector EA-C1 (WP 0009, Fig-
ure 3) from Engine ECM J2.
Continuity - (Resistance should be
9. Using a digital multimeter, test
less than 5.0 Ohms) - Proceed to
for continuity between EA-C3
step 7.
(WP 0009, Figure 12) harness
connector terminal 2, and Engine
No Continuity - Engine control wiring
ECM harness connector EA-C1
harness is open, replace engine
(WP 0009, Figure 3) terminal 53.
control wiring harness (WP 0080).
There should be good continuity.
Change 1
0011-108