Service Manual User guide

Transmission
31200079 8-15
Fig. 8-12: Transmission Shift Logic Schematic
Troubleshooting
This section provides an easy reference guide covering the most common
problems that may occur during operation of the transmission.
MV0590
RELAY K12
IGN POWER
RELAY GND
RELAY K11
SHIFT TO 1ST
SHIFTER PWR
BOOM OVER 40
RELAY K13 RELAY K14 RELAY K15 RELAY K16 RELAY K17
FORWARD SGN
PLUGGED
BOOM OVER 40
REVERSE SGN
RELAY GND
PLUGGED PLUGGED
IGN POWER
PLUGGED
BOOM OVER 20
SOLENOID Y1
SOLENOID Y2 SOLENOID Y3
DASH GND DASH GND
SOLENOID Y6 SOLENOID Y5
SOLENOID Y4
PLUGGED PLUGGED PLUGGED
SHIFTER PWR
SHIFTER Y6 SHIFTER Y3
BOOM 21-40
BOOM OVER 20
N/C
BOOM OVER 40
N/C
IGN POWER
JUMPER 1
BOOM 21-40
SOLENOID Y6
SHIFTER Y6 A
N/C
N/C
IGN POWER
SOLENOID Y1
FORWARD SGN
N/C
IGN POWER
SOLENOID Y2
REVERSE SGN
RELAY GND
RELAY GND
RELAY GND
RELAY GND
RELAY GND
RELAY GND
JUMPER 2
JUMPER 1
N/C
SHIFTER Y5
JUMPER 2
D5D4D3D1 D2
D6 D7 D8
D9
SHIFTER Y4
SHIFTER Y5
NEUTRAL
REVERSE
FORWARD
DIRECTION INPUT
FORWARD
REVERSE
NEUTRAL A
DIRECTION INPUT
RELAY K18
N/C
NEUTRAL A
NEUTRAL
FROM E2.A (SHT 1)
FROM E1.A (SHT 1)
D10
30
87a
87
86
85
87
87a
30
85
86
87
87a
30
85
86
87
87a
30
85
86
87
87a
30
85
86
87
87a
30
85
86
87
87a
30
85
86
D
F E
B
C
A
C
D
A
B
11
12
10
9
8
7
1
3 7 2
4 6
7 5
6
5
4
3 2
1
B D
C
A
87a
30
87
86
85