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
0342-08 Secondary Engine
Test Step 1. Test Signal Circuit.
Speed Sensor Abnormal
N OT E
Frequency, 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 and
verify 0342-08 is active.
2. Turn the ignition switch to the
OFF position.
3. Disconnect EA-C3 (WP 0009,
Figure 12) harness connector
from the secondary engine speed
sensor.
4. Turn the ignition switch to the ON
position.
5. Using a digital multimeter, mea-
sure voltage supply circuit EA-C3
(WP 0009, Figure 12) harness
connector terminal 1, and ground.
Voltage should be 8.0 0.8 Volts.
Voltage OK (7.2-8.8 Volts) - Proceed
to step 6.
Voltage Less Than Specified Range
- Proceed to Test Step 2.
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 the
Continuity - (Resistance should be
for continuity between EA-C3
less than 5.0 Ohms) - Proceed to
(WP 0009, Figure 12) harness
step 9.
connector terminal 2, and Engine
No Continuity - Engine control wiring
ECM harness connector EA-C1
harness is open, replace engine con-
(WP 0009, Figure 3) terminal 53.
trol wiring harness (WP 0080).
There should be good continuity.
0011-121
Change 1
