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ENGINE AND PUMP CONTROLLER CIRCUIT DIAGNOSTIC PROCEDURES - CONTINUED
ENGINE AND PUMP CONTROLLER CIRCUIT DIAGNOSTIC PROCEDURES - CONTINUED

Maintenance Manual For Hydraulic Excavator Model 230Lcr
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TM 5-3805-280-24-1
Sub-System Diagnostics
YES: Harness wire is OK.
ECONOMY (E) MODE
OUTPUT TO ENGINE
AND PUMP
NO: Harness wire is
CONTROLLER HARNESS
open. Repair.
CHECK
9015
15
T118394 1930NOV98
77
Disconnect 16-pin harness connector from monitor controller and display, and 22-pin
harness connector D from engine and pump controller.
Measure continuity between pin 15 of monitor controller harness connector and pin 5
of engine and pump controller harness connector D.
Is continuity measured?
1/1
YES: Harness wire is OK.
HIGH POWER (HP)
MODE OUTPUT TO
ENGINE AND PUMP
NO: Harness wire is
CONTROLLER HARNESS
open. Repair.
CHECK
T118376 1930NOV98
Disconnect 16-pin harness connector from monitor controller and display, and 16-pin
harness connector B from engine and pump controller.
Measure continuity between pin 23 of monitor controller harness connector and pin 11
of engine and pump controller harness connector B.
Is continuity measured?
1/1
4-142


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