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
0091 08 Throttle Position
14. Using a digital multimeter, check
Continuity - Signal Circuit Shorted,
Sensor Abnormal Fre-
for continuity between throttle
proceed to Test Step 3.
quency, Pulse Width, or
position sensor P-C23 (WP 0009,
No Continuity - Engine ECM faulty,
Period - Continued
Figure 13) harness connector ter-
replace Engine ECM (WP 0067).
minal C and all other terminals
Connect P-C23 (WP 0009, Figure 13)
and ground.
harness connector to the throttle posi-
tion sensor.
Install pedal assembly cover (WP
0288).
Test Step 2. Test 8-Volt and Return
Circuit.
N OT E
Harness connector is located behind cab bulkhead cover on right rear
of cab.
1. Remove rear bulkhead cover
plate (WP 0266) and disconnect
FA-C35 (WP 0009, Figure 15)
harness connector from P-C70
(WP 0009, Figure 16) harness
connector.
2. Install a jumper wire between
throttle position sensor P-C23
(WP 0009, Figure 13) harness
connector terminal A and B.
3. Using a digital multimeter, mea-
Continuity - (Resistance should be
sure continuity between Engine
less than 5.0 Ohms) - Cab lower
ECM harness connector P-C70
wiring harness tests OK, replace rear
(WP 0009, Figure 16) terminals 4
chassis wiring harness (WP 0189).
and 6. There should be good con-
Connect P-C23 (WP 0009, Figure 13)
tinuity.
harness connector to the throttle posi-
tion sensor.
Install pedal assembly cover (WP
0288).
No Continuity - Cab lower wiring
harness open, replace cab lower
wiring harness (WP 0266).
Connect harness connector FA-C17
(WP 0009, Figure 14) to Engine ECM.
Change 1
0011-76