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
1834-02 Ignition Key Switch
2. Disconnect the circuit breaker box
Loss of Signal - Continued
(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 - Proceed to Test Step 2.
circuit 150-RD for 18-24 Volts DC
Voltage Less than 18 Volts DC -
between the circuit breaker box
Engine control circuit breaker faulty
connector R-C5 (WP 0009, Figure
(WP 0009, Figure 43). Replace
22) (circuit breaker side) terminal
engine control circuit breaker (WP
7 and ground.
0237). See WP 0009, Figure 43) for
circuit breaker location.
Test Step 2. Test Ignition Switch.
1. Turn the ignition switch and
battery disconnect switch to the
OFF position.
2. Remove instrument panel (WP
0276).
3. Disconnect ignition switch
harness connector PF-C8 (WP
0009, Figure 36) from ignition
switch.
4. With the ignition switch ON, use a
digital multimeter to test ignition
switch for continuity between igni-
tion switch (WP 0009, Figure 48)
terminal 1 and terminal 4.
5. Turn the ignition switch ON and
No Continuity or Resistance More
OFF several times while
Than Specified Value - Ignition
monitoring digital multimeter.
switch faulty, replace ignition switch
(WP 0276).
There should be good continuity.
Connect circuit breaker box (twistlock)
Resistance should be less than 5.0
harness connector FA-C41 (WP 0009,
ohms when the ignition switch is
Figure 21).
turned to the ON position.
Continuity - (Resistance should be
less than 5.0 Ohms) - Proceed to Test
Step 3.
Test Step 3. Test Ignition Switch
1. Install a jumper wire between PF-
C8 (WP 0009, Figure 36) terminal
4 and ground.
0011-173
Change 1
