DIAGNOSTIC STATUS CODES
IT TRANSISTOR CONTROL
Page
31
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-49
Motor field current is too low during the
run mode.
This status code will be displayed when the current
draw in the motor field is too low during the run mode.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Control will only operate for a second
or two before shutting down.
POSSIBLE CAUSE
If the fault code is intermittent, verify
that the accelerator pot is adjusted
correctly.
Check for open motor field coils or
loose or intermittent field connections,
or open F1 or F2 connections.
FU5
KEY SWITCH
L
SEAT
SW
./
CH
A
R
G
E
R
ST
AR
T SW
.
F
O
RWA
RD S
W
.
R
EVER
SE SW
.
BRAKE SW.
B
SW
1
SW
2
P1
P17
P2 P6
P9
P3
P7
P8
P4
P5
P10
P21
ACC POT
BUZZER
P18
P15
PLUG PY
CONNECTIONS
OSCILLATOR CARD
+5V
NEG
PY11
PY12
P14 P20
TACH
P12
P22
P23
RS
-232
FU1
POWER
CONNECTIONS
POS
A1
F1
NEG
A2
F2
FI
E
L
D
AR
M
ATU
R
E
A2
A1
FU6
LINE
+
-
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-51
Capacitor volts are low before the line
contactor closes.
This status code will be displayed during “key on”
when the capacitor voltage is less than 85% of
battery volts at initial key switch on.
MEMORY RECALL
NO
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor does not close when
capacitor does not precharge.
POSSIBLE CAUSE
Defective control fuse.
•
Check control fuse for open circuit.
Replace fuse, if necessary.
Loose connector at P1.
•
Verify connection at P1.
Verify that hydraulic pump motor
contactor tips are not welded.
Verify that no external load has been
added to the open side of line
contactor tips.
Note: Repeated “charging/discharging”
the capacitors during troubleshooting
will cause status code 51.
FU5
KEY SWITCH
L
SEAT
SW
./
CH
A
R
G
E
R
ST
AR
T SW
.
F
O
RWA
RD S
W
.
R
EVER
SE SW
.
BRAKE SW.
B
SW
1
SW
2
P1
P17
P2 P6
P9
P3
P7
P8
P4
P5
P10
P21
ACC POT
BUZZER
P18
P15
PLUG PY
CONNECTIONS
OSCILLATOR CARD
+5V
NEG
PY11
PY12
P14 P20
TACH
P12
P22
P23
RS
-232
FU1
POWER
CONNECTIONS
POS
A1
F1
NEG
A2
F2
FI
E
L
D
AR
M
ATU
R
E
A2
A1
FU6
LINE
+
-
November 2005