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
9. Using a digital multimeter, test for
Continuity - Engine control wiring
Speed Sensor Abnormal
continuity between Engine ECM
harness is shorted, replace engine
Frequency, Pulse Width, or
harness connector EA-C1 (WP
control wiring harness (WP 0080).
Period - Continued
0009, Figure 3) terminal 53, and
No Continuity - Replace secondary
all other EA-C1 terminals, and
engine speed sensor (WP 0109).
ground.
Connect Engine ECM harness con-
There should be no continuity.
nector EA-C1 (WP 0009, Figure 3) to
Engine ECM J2.
Proceed to step 10.
10. Attempt to start the engine.
Engine Does Not Start - ECM faulty,
Engine should start and run.
replace Engine ECM (WP 0067).
Connect EA-C3 (WP 0009, Figure 12)
harness connector to the secondary
engine speed sensor.
Engine Starts and Runs - Test
complete.
Test Step 2. Test 8-Volt Supply Cir-
cuit.
1. Turn the ignition switch and
battery disconnect switch to the
OFF position.
2. Disconnect Engine ECM harness
connector EA-C1 (WP 0009, Fig-
ure 3) from Engine ECM J2.
Continuity - (Resistance should be
3. Using a digital multimeter, test for
less than 5.0 Ohms) - ECM faulty,
continuity between EA-C3 (WP
replace engine ECM (WP 0067).
0009, Figure 12) harness connec-
tor terminal 1, and Engine ECM
Connect EA-C3 (WP 0009, Figure 12)
harness connector EA-C1 termi-
harness connector to the secondary
nal 10.
engine speed sensor.
There should be good continuity.
No Continuity - Engine control wiring
harness is open, replace engine
control wiring harness (WP 0080).
Change 1
0011-122