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
0168-01 Electrical System
Test Step 2. Test ECM Ground
Voltage Low - Continued
Circuit.
1. Turn the battery disconnect
switch to the OFF position.
2. Using a digital multimeter, mea-
No Continuity - ground circuit 229-
sure the following ground circuits
BK is open. Replace rear chassis
for continuity between the Engine
wiring harness (WP 0189).
ECM harness connector FA-C17
Continuity - (Resistance should be
(WP 0009, Figure 14) and ground:
less than 5.0 Ohms) - ECM faulty,
replace Engine ECM (WP 0067).
a. Engine ECM harness
connector FA-C17 (WP 0009,
Figure 14) terminal 1 and
ground.
b. Engine ECM harness connec-
tor FA-C17 (WP 0009, Figure
14) terminal 2 and ground.
c.
Engine ECM harness connec-
tor FA-C17 (WP 0009, Figure
14) terminal 3 and ground.
d. Engine ECM harness connec-
tor FA-C17 (WP 0009, Figure
14) terminal 9 and ground.
e. Engine ECM harness connec-
tor FA-C17 (WP 0009, Figure
14) terminal 10 and ground.
Test Step 3. Test Fuse Box
Harness.
1. Turn the battery disconnect
switch to the OFF position.
2. Disconnect the circuit breaker box
(twistlock) harness connector FA-
C41 (WP 0009, Figure 21).
3. Turn the battery disconnect
switch to the ON position.
4. Using a digital multimeter, mea-
Voltage within 18 - 24 Volt DC
sure the battery voltage supply
Range - Replace rear chassis wiring
circuit 150-RD for 18-24 volts DC
harness (WP 0189).
between the circuit breaker box
Voltage Less than 18 Volts DC -
connector R-C5 (WP 0009,
Replace engine control circuit breaker
Figure 22) (circuit breaker side)
(WP 0237). See WP 0009, Figure 43)
terminal 7 and ground.
for location of engine control circuit
breaker.
Connect Engine ECM harness con-
nector FA-C17 (WP 0009, Figure 14)
to the Engine ECM J1.
Change 1
0011-96