KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
50
Possible errors of electronic linkage control systems and troubleshooting
Linkage control system wiring diagram is given in figure 5. Procedure for diagnostics of elec-
tronic linkage control system errors is given in Table 1.
CAUTION!
LINKAGE CONTROL SYSTEM CONNECTORS SHALL BE DISCON-
NECTED ONLY WHEN THE ENGINE IS SHUT DOWN!
CAUTION!
INDICATED VOLTAGE VALUES SHALL BE MEASURED WITH ENGINE
IN OPERATION, TAKING PROPER SAFETY MEASURES FOR LIVE ELECTRIC
EQUIPMENT!
CAUTION!
NUMBERING OF PINS IN HARNESS CONNECTORS IS GIVEN ON
THE CASING PARTS OF CONNECTORS!
CAUTION!
ONLY AUTHORISED DEALERS SHALL REPAIR ELECTRONIC LINK-
AGE CONTROL SYSTEMS. OTHERWISE, THE GUARANTEE FOR ELECTRONIC
LINKAGE CONTROL SYSTEMS BECOMES VOID!
Table 1
Code
Fault description, possible
cause
Fault check method
Complex faults
11
Failure in the control circuit of
lifting
solenoid valve. Break
in solenoid coil or control
harness.
Disconnect the harness from the and check the solenoid
coil for break using a multi-meter. Coil resistance shall not
exceed 2...4 Ohm. If the coil is in good condition, check
solenoid control harnesses for mechanical damage and,
using a multi-meter, check wire 255 for disconnection from
solenoid terminal to terminal 55 of 56-pin connector of the
electronic unit
12
Failure in the control circuit of
lowering
solenoid
valve.
Break in solenoid coil or con-
trol harness.
Disconnect the harness from the and check the solenoid
coil for break using a multi-meter. Coil resistance shall not
exceed 2...4 Ohm. If the coil is in good condition, check
solenoid control harnesses for mechanical damage and,
using a multi-meter, check wire 256 for disconnection from
solenoid terminal to terminal 55 of 56-pin connector of the
electronic unit
