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
Test Step 2. Throttle Lock Switch
Switch Data Erratic, Intermit- Off Position Grounded.
tent, or Incorrect - Contin-
1. Remove Control Switch Panel
ued
(WP 0275).
2. Disconnect harness connector A-
C9 (WP 0009, Figure 30) from
throttle hold mode switch.
3. Using a digital multimeter, mea-
Voltage Less Than 18 - 24 Volts -
sure for voltage between harness
Proceed to step 4.
connector A-C9 (WP 0009, Figure
Voltage Within 18 - 24 Volts -
30) terminal 3 and terminal 2
Replace throttle hold mode switch
ground.
(WP 0275).
Voltage should be 18-24 Volts DC.
4. Disconnect connector R-C1 (WP
0009, Figure 33) from connector
P-C3 (WP 0009, Figure 34).
5. Using a digital multimeter, mea-
Voltage Less Than 18 - 24 Volts -
sure for voltage between harness
Proceed to step 9.
connector P-C3 (WP 0009, Figure
Voltage Within 18 - 24 Volts - Pro-
34) terminal 45 and terminal 17
ceed to step 6.
ground.
Voltage should be 18-24 Volts DC.
6. Turn the ignition switch and bat-
tery disconnect switch to the OFF
position.
7. Disconnect connector A-C1 (WP
0009, Figure 31) from connector
R-C2 (WP 0009, Figure 32).
8. 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 3 and terminal 2. There
Connect connector R-C1 (WP 0009,
should be no continuity.
Figure 33) to connector P-C3 (WP
0009, Figure 34).
No Continuity - Cab upper wiring
harness is shorted, replace cab upper
wiring harness (WP 0265).
9. 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).
0011-131
Change 1
