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
0100-04 Engine Oil Pres-
6. Using a digital multimeter, test for
Continuity - (Resistance should be
sure Sensor Voltage Below
continuity between Engine ECM
less than 5.0 Ohms)- 5-volt supply
Normal - Continued
harness connector EA-C1 (WP
circuit L730-OR tests OK. Engine
0009, Figure 3) terminal 47 and
ECM faulty, replace Engine ECM (WP
terminal 39.
0067).
There should be good continuity.
Connect the engine oil pressure sen-
sor harness connector EA-C5 (WP
0009, Figure 19).
Remove jumper wire from EA-C5 (WP
0009, Figure 19) terminal 1 and termi-
nal 2.
No Continuity - Engine control wiring
harness is open, replace engine con-
trol wiring harness (WP 0080).
0100 10 Engine Oil Pressure
System Response:
Sensor Abnormal Rate of
A warning will appear on instru-
Change
ment panel.
ECM will flag engin oil pressure
e
as invalid data.
Possible Performance Effect:
None.
N OT E
The 5-Volt supply circuit is a common supply circuit which is bussed
internally of the Engine ECM. The supply voltage is 5.0 0.16 Volts.
Out put of the 5-Volt supply circuit is at Engine ECM J2-46 circuit T997-
OR, J2-47 circuit L730-OR, J2-48 circuit R997-OR, and J1-42 circuit
R997-OR. The 5-Volt supply circuits are supplied to the intake manifold
pressure sensor terminal 1, the engine oil pressure sensor terminal 1,
the fuel rail pressure sensor terminal 1, and the turbocharger air inlet
pressure sensor terminal A.
Each sensor has a return or ground circuit and is a common supply
circuit which is bussed internally of the Engine ECM. The sensor return
circuit is at Engine ECM J2-40 circuit Y940-BR, J2-39 circuit Y947-BR,
J2-38 circuit T993-BR, and J1-34 circuit R993-BR.
The engine oil pressure sensor signa circuit is an input to the Engine
l
ECM at Engine ECM J2-46 circuit 994-GY.
0011-84
