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
2771-04 Throttle Hold Set/
5. Using a digital multimeter, test for
Continuity - Replace throttle hold set/
Accel Switch Voltage Below
continuity between throttle hold
accel switch (WP 0275).
Normal - Continued
set/accel switch connector termi-
No Continuity - Proceed to Test
nal 2 and terminal 3.
Step 3.
Test Step 3. Test Throttle Hold Set/
Accel Switch Cables Short to
Ground.
1. Disconnect connector FA-C17
(WP 0009, Figure 14) from
Engine ECM connector J1.
2. Using a digital multimeter, test for
Continuity - Proceed to Test Step 4.
continuity at the harness connec-
No Continuity - ECM faulty, replace
tor A-C11 (WP 0009, Figure 41)
Engine ECM (WP 0067).
terminal 1 and 2 then terminal 3
Connect the control switch panel har-
and 2. There should be no conti-
ness connector A-C11 (WP 0009, Fig-
nuity.
ure 41) to throttle hold set/accel
switch.
Install control switch panel (WP 0275).
Test Step 4. Isolate Short to
Ground on Throttle Hold Set/Accel
Switch Cables.
1. Disconnect harness connector P-
C71 (WP 0009, Figure 18) from
harness connector FA-C23 (WP
0009, Figure 17).
2. Using a digital multimeter, test for
Continuity - Cables from throttle hold
continuity at the harness connec-
set/accel switch shorted, proceed to
tor P-C71 (WP 0009, Figure 18)
step 3.
terminal 20 and terminal 9 then
No Continuity - Rear chassis wiring
terminal 20 and terminal 10.
harness is shorted. Replace rear
There should be no continuity.
chassis wiring harness (WP 0189).
Connect the control switch panel har-
ness connector A-C11 (WP 0009, Fig-
ure 41) to throttle hold set/accel
switch.
Install control switch panel (WP 0275).
3. Disconnect harness connector R-
C1 (WP 0009, Figure 33) from
harness connector P-C3 (WP
0009, Figure 34).
Change 1
0011-198