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
0168-02 Electrical System
Test Step 2. Test ECM Ground
Voltage Erratic, Intermittent,
Circuit.
or Incorrect - Continued
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
ECM harness connector FA-C17
(WP 0189).
(WP 0009, Figure 14) and ground:
Continuity - (Resistance should be
less than 5.0 Ohms) - ECM faulty,
a. Engine ECM harness
replace Engine ECM (WP 0067).
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.
There should be good continuity.
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, Figure
Replace engine control circuit breaker
22) (circuit breaker side) terminal
(WP 0237).
7 and ground.
Connect Engine ECM harness con-
nector FA-C17 (WP 0009, Figure 14)
to the Engine ECM J2.
0011-101
Change 1