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DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL Page 38
January 2000
TRACTION
STATUS CODE
DESCRIPTION OF STATUS CAUSE OF STATUS INDICATION
-68
The PMT enable signal from the
auxiliary (slave) control to the master
control drops below 5V.
This status code will be displayed when the voltage at
the master PL21 drops below 5V.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
Circuits valid
for
Traction
Controller
SYMPTOM
Control will not operate.
POSSIBLE CAUSE
Auxiliary control shut down.
•= Check auxiliary control for stored faults.
Verify connection between the master control P21 and the
auxiliary/slave control P10.
TROUBLE-SHOOTING DIAGRAM
POWER CONNECTIONS
LEFT CONTROL
POS A1
F1
NEG A2
F2
FIELD
ARMATURE
FU1
POWER CONNECTIONS
RIGHT CONTROL
POS A1
F1
NEG
A2
F2
FIELD
ARMATURE
FU5
KEY SWITCH
L
P7
P1
P17
P2 P6
P9
P3
P12 P8
P4
P5
SEAT SW.
START SW.
FORWARD SW.
REVERSE SW.
BRAKE SW.
P10 P21
ACC POT
STEER ANGLE
POT
BDI INTERRUPT
P18
P7 P12
P6P2P1 P3 P4
P5
P10
P13
LINE
P16
P15
PY7
PY12
PY10
PY11
P16
P15
AUTO REGENERATIVE
BRAKING ENABLE
PMT ENABLE OUTPUT
25
P18
STEER PUMP
CONTACTOR DRIVER
P11
REGEN OUTPUT
SIGNAL
29
50 30
66 65
PY7
PY12
PY10
PY11
PLUG PY
CONNECTIONS
PLUG PY
CONNECTIONS
8
6
15
710
12-1
10
SP
P1
P5
60
24
P4
12
P2
FU7
TO ACCESSORIES
FU6
P3
12-1
OSCILLATOR CARD
LEFT CONTROL
OSCILLATOR CARD
RIGHT CONTROL
3
A2
S1
TMM7
A2
A1
5
13A
A2
A1
+
-
SP
A1
A2
SP
FU4
89
88
TMM7
2
43
A1
S2
FU2
P
P