TM 5-2410-241-23-1
0019
Table 2. Engine Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
172-3 Intake Manifold Air
17. Using digital multimeter
1. If continuity is found, replace ECM
Temp Open/Short to
(WP 0296), test for continuity
harness (WP 0105). Ensure all
+Batt - Continued
between pin 35 ECM harness
harness connectors are recon-
connector N-C1 (WP 0018,
nected. Verify correct operation of
Figure 2) and all other pins on
machine (TM 5-2410-241-10).
ECM harness connector N-C1
2. If continuity is not found, replace
(WP 0018, Figure 2).
engine ECM (WP 0101). Ensure
all harness connectors are recon-
nected. Verify correct operation of
machine (TM 5-2410-241-10).
172-4 Intake Manifold Air
1. Connect MSD (WP 0016). Select
1. If active 172-4 code is present,
Temp Short to Ground
3176C D7 engine ECM and check
proceed to step 2.
for Diagnostic Codes or Event
2. If no active codes are present,
Codes (WP 0013).
problem does not exist at this
time. Resume normal operation.
2. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-2410-241-10).
3. Disconnect ECM harness connec-
tor NC-C2 (WP 0018, Figure 25)
from Intake manifold air tempera-
ture sensor (WP 0054).
4. Check for Diagnostic Codes or
1. If active 172-3 code is present,
Event Codes (WP 0013).
replace intake manifold tempera-
ture sensor (WP 0066). Ensure all
harness connectors are recon-
nected. Verify correct operation of
machine (TM 5-2410-241-10).
2. If active 172-4 code is present,
proceed to step 5.
5. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-2410-241-10).
6. Disconnect intake manifold air
temperature jumper connector
NC-C1 (WP 0018, Figure 26) from
ECM harness connector N-C10
(WP 0018, Figure 23).
7. Using digital multimeter
1. If continuity is found, proceed to
(WP 0296), test for continuity
step 8.
between pin 1 on intake manifold
2. If continuity is not found, replace
air temperature jumper connector
intake manifold air inlet tempera-
NC-C1 (WP 0018, Figure 26) and
ture sensor harness (WP 0054).
pin 1 on intake manifold air tem-
Ensure all harness connectors
perature jumper connector NC-C2
are reconnected. Verify correct
(WP 0018, Figure 25).
operation of machine (TM 5-2410-
241-10).
