TM 10-3930-675-24-1
AUXILIARY PUMP TROUBLESHOOTING
THIS WORK PACKAGE COVERS
Error Code 169 - Tophandler Emergency Function Sup-
Error Code 417 - Auxiliary Pump Switch, Circuit Input
ply Valve, Open or Short Circuit Failure
Error
Error Code 411 - Auxiliary Pump Control, Short Circuit
Failure
INITIAL SETUP
References - Continued
References
ECS Electrical Servo (A34648.0200) (WP 0048 00-
TM 10-3930-675-10
5)
Auxiliary Pump (A34746.0200) (WP 0048 00-47)
Current Supply (A34738.0200) (WP 0048 00-31)
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that
locate critical components.
Refer also to illustration at end of work package for component location.
Table 1. Error Code 169 - Tophandler Emergency Function Supply
Valve, Open or Short Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 169 - Tophandler Emergency 1. Place ignition switch to ON but
The ATTACH "OUTPUT" value
Function Supply Valve, Open or Short Circuit
don't start engine. Access the
should have voltage (24V) and
Failure.
diagnostic menu "SERVO"
the "INPUT" value (mA) should
12(13). Turn on auxiliary
rise while operating a tophandler
Pump and operate one of the
function.
tophandler functions.
DIAG SERVO
12(13)
VALVES OUTPUT/INPUT
ATTACH 0.00V
0mA
PUMP OFF 0.00V
0mA
2. Check voltage at X158 a. If voltage (21 to 24V) found
between pin 11 and pin 12 with
continuously,
disconnect
the ignition and the auxiliary
X158 and check the resistance
pump on (WP 0048 00-8).
on the loose part of X158
Should have (21 to 24V) while
between pin 11 and pin 12.
operating one of the tophandler
Resistance should be 40 to 43
functions.
Ohms. Check resistance to
ground at either pin.
