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
0091 08 Throttle Position
6. Using a digital multimeter, mea-
Voltage OK (7.2 - 8.8 Volts) - 8-Volt
Sensor Abnormal Fre-
sure for voltage between throttle
supply circuit J844-GY and Engine
quency, Pulse Width, or
position sensor P-C23 (WP 0009,
ECM test OK, proceed to step 7.
Period - Continued
Figure 13) harness connector ter-
Voltage NOT OK - Proceed to Test
minal A and ground.
Step 2.
7. Using a digital multimeter, mea-
Voltage OK (7.2 - 8.8 Volts) - Sensor
sure for voltage between P-C23
return circuit J766-PU and Engine
(WP 0009, Figure 13) harness
ECM test OK, proceed to step 8.
connector terminal A and terminal
Voltage NOT OK - Proceed to Test
B (Ground).
Step 2.
8. Using a digital multimeter, mea-
Voltage OK (11.8 - 12.3 Volts) -
sure for voltage between P-C23
Sensor signal circuit J766-PU and
(WP 0009, Figure 13) harness
engine ECM test OK. Replace throttle
connector terminal C and terminal
position sensor (WP 0288).
B (Ground).
Voltage Not OK - Sensor signal cir-
cuit J766-PU and engine ECM test
OK, proceed to step 9.
9. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
10. Disconnect Engine ECM harness
connector (J1) FA-C17 (WP 0009,
Figure 14).
11. Install a jumper wire between
throttle position sensor P-C23
(WP 0009, Figure 13) harness
connector terminal B and C.
12. Using a digital multimeter, mea-
Continuity - (Resistance should be
sure continuity between Engine
less than 5.0 Ohms) - Signal Circuit
ECM harness connector FA-C17
F702-GN tests OK, proceed to
(WP 0009, Figure 14) terminals
step 13.
33 and 53. There should be good
No Continuity - Signal Circuit F702-
continuity.
GN is open, proceed to Test Step 3.
13. Remove jumper wire between
throttle position sensor P-C23
(WP 0009, Figure 13) harness
connector terminal B and C.
0011-75
Change 1
