Table 2. Engine Troubleshooting with Codes for the 120M Motor Grader - Continued.
CDI FMI CODE
N OT E
0110-03 Engine Coolant
Temperature Sensor Voltage
The Engine Electronic Control Module (ECM) continuously outputs a
Above Normal Code - Con-
pull-up voltage on sensor signal circuit. The Engine ECM uses this pull-
up voltage to detect an open in the signal circuit. When the Engine ECM
detects the presence of voltage that is above a threshold on signal
circuit, the Engine ECM will generate a voltage above normal diagnostic
code for the sensor.
The signal circuit is a regulated 5-Volt supply within the Engine ECM.
The supply voltage is 5.0 ± 0.05 Volts. The signal circuit from the
Engine ECM J2-43 circuit 995-BU to the engine coolant temperature
sensor harness connector EA-C9 terminal 1. The return circuit is a
common ground from the Engine ECM J2-37 circuit L731-BR and is
spliced externally of the ECM to the engine coolant temperature sensor
harness connector EA-C9 terminal 2, and the intake manifold
temperature sensor harness connector EA-C8 terminal 2.
Test Step 1. Test Signal Circuit.
N OT E
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.
Engine ECM C6.6 120M and
verify 0110-03 is active.
2. Turn ignition switch to the OFF
3. Disconnect the engine coolant
temperature sensor EA-C9 (WP
0009, Figure 20) harness connec-
4. Turn the ignition switch to the ON
Voltage OK (5.0 ± 0.05 volts) -
sure the engine coolant tempera-
Proceed to step 6.
ture sensor signal circuit 995-BU
Voltage More Than Specified
Range - Proceed to step 9.
20) harness connector terminal 1,
Voltage should be 5.0 ± 0.05 volts.