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Page Title: Table 6-3. Improved Clean Air Induction System Troubleshooting - Continued
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TB 9-2300-378-14
Table 6-3. Improved Clean Air Induction System Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
DUST DETECTOR WARNING LIGHT ON, POWERPLANT WARNING LIGHT OFF, DUST
8.
DETECTOR PRESSURE SWITCH(ES) TRIPPED (FIG 3-312.1).
Step 1.  Set MASTER BATTERY switch to OFF.
Step 2.  Disconnect connector P1 of harness 12325927 from dust detector warning
light box.
Step 3.  Set MASTER BATTERY switch to ON. Check for 24 vdc between pins-D
(positive) and B (negative) of harness connector P1.
If 24 vdc exists, replace dust detector warning light box (para. 6-17g,
a.
M60A3; 6-17h, M728; 6-17i, M48A5AVLB, M60A1AVLB).
If 24 vdc does not exist, replace dust detector warning light wiring
b.
harness 12325927 (6-17f).
POWERPLANT WARNING LIGHT ON, DUST DETECTOR WARNING LIGHT OFF, DUST
9.
DETECTOR PRESSURE SWITCH(ES) TRIPPED (FIG. 6-2).
Step 1.  Set MASTER BATTERY switch to ON.
Step 2.  Press DUST DETECTOR WARNING LIGHT lamp to test.
a.  If light comes on, replace dust detector warning light box (para. 6-17g,
M60A3; 6-17h, M728; 6-17i, M48A5AVLB, M60A1AVLB).
b.  If lamp does not come on, go to step 3.
Step 3.  Replace DUST DETECTOR WARNING lamp.
a.  If lamp operates, discard defective bulb.
If lamp does not operate, go to step 4.
b.
Step 4.  Set MASTER BATTERY switch to OFF.
Step 5.  Disconnect connector P1 of harness 12325927 from dust detector warning
light box.
Step 6.  Set MASTER BATTERY switch to ON. Check for 24 vdc between pins A and
B of connector P1.
If 24 vdc exists, replace dust detector warning light box (para. 6-17g,
a.
M60A3; 6-17h, M728; 6-17i, M48A5AVLB, M60AlAVLB).
b.  If 24 vdc does not exist, replace dust detector warning light wiring
harness 12325927 (para 6-17f).
DUST DETECTOR PRESSURE SWITCH(ES) TRIPPED, BUT DUST DETECTOR WARNING
10.
LIGHT AND POWERPLANT WARNING LIGHT DO NOT COME ON (FIG. 6-2).
Step 1.  Set MASTER BATTERY switch to OFF.
Step 2.  Disconnect leads of engine wiring harness 12314608 (circuit 509B) from right
and left dust detector pressure switches. Check continuity across terminals
of each pressure switch connector.
a.  If continuity across terminals does not exist, replace pressure switch
b.  If continuity across terminals does exist, check continuity from
connector pin B to ground lead of harness 12314608.
c.  If ground lead continuity does not exist, replace harness 12314608 (para.
d.  If ground lead continuity exists, check continuity of engine wiring
harness 12314608 (circuit 509B) from pin C of engine connector to pin A
of pressure switch connector.
6-17

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