DIAGNOSTIC STATUS CODES
IT TRANSISTOR CONTROL
Page
20
April 2012
Section 4.6 Traction Control Codes
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-04
Emergency brake switch is open.
This status code will be displayed when P13 is
greater than 2.5 volts.
MEMORY RECALL
NO
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Control will not operate; buzzer will sound.
POSSIBLE CAUSE
Emergency brake switch input mis-adjusted or
defective.
Input voltage at P13 should be less than
2.5VDC. Adjust or replace the brake switch to
insure that the voltage at P13 is less than
2.5VDC.
Open circuit between battery negative and P13 in
the emergency brake switch input circuit.
Disconnect wire from P13. Check for open
circuit between this wire and battery negative.
Defective controller.
Voltage measured between P13 and
negative should be 4.5VDC. If not, replace
control.
L
P9
P7
P8
P1
P17
P2
P6
P4
P5
TU
RF SW
.
FO
R
W
A
R
D SW
.
REV
E
RS
E SW
.
ACC POT
TACHOMETER
P15 P14 P16
P10
BU
ZZ
ER
RE
D
GR
E
E
N
BL
AC
K
P12
REGEN
B
R
AK
E S
W
P21
MO
T
O
R
OV
ER T
E
MP
+72V
+72V
+72V
+72V
+72V
+72V
+72V
P22
P23
P20
RS232
72V
NEG
P3
NE
G
I
N
PUT
ST
A
R
T SW
.
72V
NEG
P13
NE
G
I
N
PUT
BR
AKE
S
W
.
72V
NEG
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-05
Start switch fails to close.
This status code will be displayed when the
accelerator voltage at P7 is >1.4V, with the start
switch open (P3 > 2.5 volts)
MEMORY RECALL
NO
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Control will not operate.
POSSIBLE CAUSE
Defective start switch circuit.
Check start switch to insure closure when
accelerator pedal is depressed.
Check for open circuit or loose
connections in start switch wiring.
Check for proper accelerator pot
adjustment
Defective accelerator switch.
Check
accelerator
switch potentiometer
for proper operation and ohmic value
L
P9
P7
P8
P1
P17
P2
P6
P4
P5
TU
RF SW
.
FO
R
W
A
R
D SW
.
REV
E
RS
E SW
.
ACC POT
TACHOMETER
P15 P14 P16
P10
BU
ZZ
ER
RE
D
GR
E
E
N
BL
AC
K
P12
REGEN
B
R
AK
E S
W
P21
MO
T
O
R
OV
ER T
E
MP
+72V
+72V
+72V
+72V
+72V
+72V
+72V
P22
P23
P20
RS232
72V
NEG
P3
NE
G
I
N
PUT
ST
A
R
T SW
.
72V
NEG
P13
NE
G
I
N
PUT
BR
AKE
S
W
.
72V
NEG