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
0172-03 Intake Manifold Air
12. Using a digital multimeter, test
Continuity - Engine control wiring
Temperature Sensor Voltage
continuity of ECM harness con-
harness is shorted, replace engine
Above Normal - Continued
nector EA-C1 (WP 0009, Figure
control wiring harness (WP 0080).
3) terminal 42 and all other EA-C1
No Continuity - ECM faulty, replace
terminals. There should be no
Engine ECM (WP 0067).
continuity.
Connect the intake manifold tempera-
ture sensor EA-C8 (WP 0009,
Figure 23 harness connector.
Test Step 2. Test Return Circuit.
1. Turn the ignition switch and
battery disconnect switch to the
OFF position.
2. Remove jumper wire from the
intake manifold temperature sen-
sor harness connector EA-C8
(WP 0009, Figure 23 terminal 1,
and terminal 2.
3. Disconnect Engine ECM harness
connector EA-C1 (WP 0009,
Figure 3) from Engine ECM J2.
4. Disconnect the engine coolant
temperature sensor EA-C9 (WP
0009, Figure 20) harness
connector.
5. Using a digital multimeter, test
Continuity - (Resistance should be
continuity between EA-C1 (WP
less than 5.0 Ohms) - Proceed to step
0009, Figure 3) terminal 37 and
6.
EA-C9 (WP 0009, Figure 20) ter-
No Continuity - Engine control wiring
minal 2. There should be good
harness is open, replace engine
continuity.
control wiring harness (WP 0080).
6. Using a digital multimeter, test
Continuity - (Resistance should be
continuity between EA-C1 (WP
less than 5.0 Ohms) - ECM faulty,
0009, Figure 3) terminal 37 and
replace Engine ECM (WP 0067).
EA-C8 (WP 0009, Figure 23 ter-
Connect the intake manifold tempera-
minal 2.
ture sensor EA-C8 (WP 0009, Figure
23 harness connector.
Connect the engine coolant tempera-
ture sensor EA-C9 (WP 0009,
Figure 20) harness connector.
No Continuity - Engine control wiring
harness is open, replace engine con-
trol wiring harness (WP 0080).
Change 1
0011-104