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
7.
Using a digital multimeter, test for
Continuity - Switch panel wiring
Switch Data Erratic, Intermit-
continuity at the harness connec-
harness is shorted, replace switch
tent, or Incorrect - Contin-
tor A-C1 (WP 0009, Figure 31)
panel wiring harness (WP 0265).
ued
terminal 4 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).
Voltage Less Than 18 - 24 Volts -
9. Using a digital multimeter, mea-
Proceed to step 10.
sure for voltage between harness
connector FA-C23 (WP 0009, Fig-
Voltage Within 18 - 24 Volts - Cab
ure 17) terminal 16 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.
12. Using a digital multimeter, test for
Continuity - Rear chassis wiring
continuity between the harness
harness is shorted, replace rear
connector FA-C17 (WP 0009, Fig-
chassis wiring harness (WP 0189).
ure 14) terminal 50 and all other
Connect connector R-C1 (WP 0009,
FE-C1 terminals. There should be
Figure 33) to connector P-C3 (WP
no continuity.
0009, Figure 34).
Connect harness connector A-C9
(WP 0009, Figure 30) to throttle hold
mode switch.
No Continuity - ECM faulty, replace
Engine ECM (WP 0067).
Connect connector R-C1 (WP 0009,
Figure 33) to connector P-C3 (WP
0009, Figure 34).
Connect harness connector A-C9
(WP 0009, Figure 30) to throttle hold
mode switch.
0011-135
Change 1