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
12.
Using a digital multimeter, test for
Continuity - Rear chassis wiring
Switch Data Erratic, Intermit-
continuity between the harness
harness is shorted, replace rear
tent, or Incorrect - Contin-
connector FA-C17 (WP 0009, Fig-
chassis wiring harness (WP 0189).
ued
ure 14) terminal 51 and all other
Connect connector R-C1 (WP 0009,
terminals. There should be no
Figure 33) to connector P-C3 (WP
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.
Test Step 4. Throttle Lock Switch
Automatic Position Grounded.
1. Disconnect harness connector A-
C9 (WP 0009, Figure 30) from
throttle lock switch.
2. Using a digital multimeter, mea-
Voltage Less Than 18 - 24 Volts -
sure for voltage between harness
Proceed to step 3.
connector A-C9 (WP 0009, Figure
Voltage Within 18 - 24 Volts -
30) terminal 6 and terminal 5
Replace throttle lock switch (WP
ground.
0275).
Voltage should be 18-24 Volts DC.
3. Disconnect connector R-C1 (WP
0009, Figure 33) from connector
P-C3 (WP 0009, Figure 34).
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 44 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).
Change 1
0011-134
