TM 10-3930-675-20-1
0009 00-2
COOLING FAN OPERATION AND FAN CONTROL TROUBLESHOOTING - CONTINUED
0009 00
Table 1. Error Code 166 - Cooling Fan Speed, Wiring Circuit Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 166 - Cooling Fan Speed, Wiring
Circuit Failure - Continued
b. If voltage is not present,
check continuity between
ECU (790) connector 2 pin
13 and connector X158 pin
10, between ECU (790)
connector 2 pin 10 and
connector X159 pin 1, and
between connector X159
pin 1 and connector X158
pin 9.
If continuity is not present,
repair or replace connectors (WP
0111 00).
3. Perform voltage check at
connector block X154 pin 3.
a. If 20-25V are present,
check continuity between
connector X154 pin 3 and
ECU (790) connector 2 pin
9.
If continuity is not present,
repair or replace connectors (WP
0111 00).
b. If voltage is not present,
check continuity between
connector X154 pin 3 and
emergency stop switch
(250) pin 2.
If continuity is not present,
repair or replace connectors (WP
0111 00).
4. Enter
“DIAG
SERVO
11(13)” menu and check
current of FAN OUTPUT.
Current should be present.
a. If current is not present,
replace ECU (790) (WP 0079
00).
b.If current is present, notify
SRA.
