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Table 2. Engine Troubleshooting with Codes for the 120M Motor Grader - Continued.
Table 2. Engine Troubleshooting with Codes for the 120M Motor Grader - Continued.

Maintenance Manual For Motorized Road Grader Model 120M - 1
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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
0004-05 Cylinder #4 Injector
Test Step 2. Isolate Problem with
Current Below Normal -
Engine Control Wiring Harness.
Continued
1. Turn ignition switch to the OFF
position.
2. Disconnect EA-C12 (WP 0009,
Figure 5) harness connector from
EG-C1 (WP 0009, Figure 6) at the
valve cover base.
3. Install jumper wire at the EA-C12
(WP 0009, Figure 5) harness con-
nector between terminal 1 and
terminal 2.
4. Turn ignition switch to the ON
position.
N OT E
Wait at least 30 seconds in order for diagnostic codes to become active.
5. Start engine or attempt to start
0004-06 Becomes Active - ECM and
engine.
engine control wiring harness are OK,
proceed to Test Step 3.
6. At the MSD check that diagnostic
0004-05 Remains Active - Proceed
code 0004-06 is active.
to step 7.
7. Turn OFF the ignition and battery
disconnect switch.
8. Disconnect ECM harness connec-
tor EA-C1 (WP 0009, Figure 3)
from Engine ECM J2.
9. Leave jumper wire at the EA-C12
(WP 0009, Figure 5) harness con-
nector between terminal 1 and
terminal 2 in place.
10. Using a digital multimeter, test for
Continuity - (Resistance less than
continuity at Engine ECM harness
5.0 Ohms) - ECM faulty, replace
connector EA-C1 (WP 0009, Fig-
Engine ECM (WP 0067).
ure 3) between terminal 8 and ter-
Remove jumper wire from EA-C12
minal 64.
(WP 0009, Figure 5) between terminal
1 and terminal 2.
Connect EA-C12 (WP 0009, Figure 5)
harness connector to EG-C1 (WP
0009, Figure 6) at the valve cover
base.
No Continuity - Proceed to step 11.
Change 1
0011-46


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