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
0549-02 Throttle Lock
3. Disconnect connector R-C1 (WP
Switch Data Erratic, Intermit-
0009, Figure 33) from connector
tent, or Incorrect - Contin-
P-C3 (WP 0009, Figure 34).
ued
4. Using a digital multimeter, mea-
Voltage Less Than 18 - 24 Volts -
sure for voltage between harness
Proceed to step 8.
connector P-C3 (WP 0009, Figure
Voltage Within 18 - 24 Volts - Pro-
34) terminal 46 and terminal 17
ceed to step 5.
ground.
Voltage should be 18-24 Volts DC.
5. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
6. Disconnect connector A-C1 (WP
0009, Figure 31) from connector
R-C2 (WP 0009, Figure 32).
7. Using a digital multimeter, test for
Continuity - Switch panel wiring
continuity at the harness connec-
harness is shorted, replace switch
tor A-C1 (WP 0009, Figure 31)
panel wiring harness (WP 0265).
terminal 1 and terminal 2. There
No Continuity - Cab upper wiring
should be no continuity.
harness is shorted, replace cab upper
wiring harness (WP 0265).
8. Remove rear bulkhead cover
plate (WP 0266) and disconnect
connector P-C71 (WP 0009, Fig-
ure 18) from connector FA-C23
(WP 0009, Figure 17).
9. Using a digital multimeter, mea-
Voltage Less Than 18 - 24 Volts -
sure for voltage between harness
Proceed to step 10.
connector FA-C23 (WP 0009, Fig-
Voltage Within 18 - 24 Volts - Cab
ure 17) terminal 14 and terminal
lower wiring harness shorted, replace
20 ground.
cab lower wiring harness (WP 0266).
Voltage should be 18-24 volts DC.
Connect harness connector A-C9
(WP 0009, Figure 30) to throttle hold
mode switch.
10. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
11. Disconnect connector FA-C17
(WP 0009, Figure 14) from
Engine ECM connector J1.
0011-133
Change 1
