33 - 2
ECU Electrical Connections
Electrical connections at the ECU are shown in the diagram
below. Connections are divided into two groups;
GB
Connections to components mounted on the gearbox
GC
Connections to components mounted elsewhere on the
machine.
For the key to the main components see
Component
Identification
on the previous page. For more detailed
explanations of the electrical connections for gearbox
control see subsequent pages.
Note:
When fault finding DO NOT use a multimeter on the
ECU connector pins. Only test the associated wiring,
uncouple connectors GB and GC and then use a multimeter
at the pins inside these connectors as applicable. Use the
ShiftMaster Diagnostics system to identify possible faults
with the ECU See
Powershift Gearbox - 6 Speed,
ShiftMaster Diagnostics - User Guide
.
Section F
9803/3280
Section F
33 - 2
Issue 1
Electrical Connections
Powershift Gearbox - 6 Speed
ShiftMaster ECU
G
B
1
G
B
2
GC3
GC4
GC6
GC10
GB14
GB17
GB18
GB19
GB20
G
B
1
6
G
B
4
G
B
6
GB7
GB8
GB13
E
C
U
F
E
E
D
B2
F
EED
B1
F
EED
C
A
N
H
IN
IN
OUT
OUT
C
A
N
L
IN
IN
IN
IN
FREQ2
OUT
OUT
G
B
3
6
GB25
G
B
2
6
GB27
GB28
OUT
EC
U
G
N
D
IN
IN
EC
U
G
N
D
GC11
GC12
GC13
GC24
IN
OUT
GND RTN
OUT
OUT
GC15
TRANS SPEED
'Z' SOLENOID
'U' SOLENOID
LOW TRANS
OIL PRESS
'X' SOLENOID
BANK 1 GROUND RETURN
'T' SOLENOID
'Y' SOLENOID
GEAR A
GEAR 1
THROTTLE
D-4WD
FORWARD
GEAR 2
LOW
SPEEDOMETER
OIL PRESSURE
DRIVER INDICATOR
GEAR 3
NEUTRAL
GB38
GB39
GB40
GB37
IN
IN
IN
IN
REVERSE
KICKDOWN
I-4WD
DUMP
GC18
OUT
4WD SOLENOID 'S'
IN
GC21
IN
HI TRANS
OIL TEMP
GC20
GC23
OUT
OUT
'V' SOLENOID
'W' SOLENOID
SPEED
SENSOR
F
N
R
1
2
3
DIAGNOSTICS
CONNECTOR
GB30
PARK BRAKE
12V
12V
12V
12V
(IGNITION)
A
1
C
B
K
D
J
3
H
S-Z
N
L
E
P
F
R
A408760
GB1
Feed from GC10
GB2
12v Feed
GB4
12v Feed
GB6
Diagnostics connector
GB7
Forward switch
GB8
2nd gear switch
GB13
Warning lamp
Low trans oil pressure
GB14
Speedometer input
GB17
Auto gear switch
GB18
1st gear switch
GB19
Throttle switch
GB20
Foot brake switch
(4WD/4 wheel brake)
GB24
Diagnostics connector
GB25
Master warning lamp
GB26
ECU Earth
GB27
3rd gear switch
GB28
Neutral switch
GB30
Parkbrake ON switch
GB36
ECU Earth
GB37
Trans dump switch
GB38
Reverse switch
GB39
Kickdown switch
GB40
4WD switch
GC3
Speed sensor -
input
GC4
Output - ‘Z’ solenoid
GC6
Output - ‘U’ solenoid
GC10
Feed to GB1
GC11
Switch
Low trans oil pressure
GC12
Output - ‘X’ solenoid
GC13
ECU Earth
GC15
Output - ‘Y’ solenoid
GC18
Output - ‘S’ 4WD
solenoid
GC20
Output - ‘V’ solenoid
GC21
Switch
Trans oil temperature
GC23
Output - ‘W’ solenoid
GC24
Output - ‘T’ solenoid