Isuzu KB P190. Manual — part 1072
7A2-4 TRANSMISSION CONTROL SYSTEM (JR405E)
Clutch, Brake, Solenoid and Pressure Switch Logic
Clutch status
Brake status
Selector
position
Selected gear
position
High clutch
Low clutch
Reverse clutch
Low one-way
clutch
Low & reverse
brake
2-4 brake
P
-
R
Reverse
{
{
N
-
D
1st
{
{ *1
2nd
{
{
3rd
{
{
4th
{
{
3
1st
{
{ *1
2nd
{
{
3rd
{
{
2
1st
{
{ *1
2nd
{
{
L
1st
{
{ *1
{
{= Applied
*1= Holding
Solenoid command
Transmission fluid pressure (TFP)
switch
Selector
position
Selected gear
position
Low &
reverse
brake
2-4 brake
High clutch
Low clutch
Low &
reverse
brake
2-4 brake
High clutch
P
-
{
{
{
R
Reverse
{
{
{
N
-
{
{
{
D
1st
{
{
{
2nd
{
{
{
3rd
{
{
{
4th
{
{
{
{
3
1st
{
{
{
2nd
{
{
{
3rd
{
{
{
2
1st
{
{
{
2nd
{
{
{
L
1st
{
{
{
{= Command On
{= On (closed)
TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-5
Diagnostic Trouble Code (DTC) List
DTC
Flash Code
DTC Descriptor
P0560
16
System Voltage Malfunction
P0602
—
Control Module Programming Error
P0705
17
Inhibitor Switch Malfunction
P0710
15
Transmission Fluid Temperature Sensor Circuit Malfunction
P0717
14
Input/Turbine Speed Sensor “A” Circuit No Signal
P0722
11
Output Speed Sensor Circuit No Signal
P0727
13
Engine Speed Sensor Input Circuit No Signal
P0731
41
Gear 1 Incorrect Ratio
P0732
42
Gear 2 Incorrect Ratio
P0733
43
Gear 3 Incorrect Ratio
P0734
44
Gear 4 Incorrect Ratio
P0748
35
Line Pressure Solenoid Malfunction
P0753
31
Low & Reverse Brake Duty Solenoid Malfunction
P0758
32
2-4 Brake Duty Solenoid Malfunction
P0763
33
High Clutch Duty Solenoid Malfunction
P0768
34
Low Clutch Duty Solenoid Malfunction
P1120
22
Throttle Position Signal Malfunction
P1750
51
Low & Reverse Brake Fail Safe Valve Malfunction
P1755
52
2-4 Brake Fail Safe Valve Malfunction
P1853
26
Low & Reverse Brake Pressure Switch Malfunction
P1858
27
2-4 Brake Pressure Switch Malfunction
P1860
36
Lock Up Duty Solenoid Malfunction
P1863
28
High Clutch Pressure Switch Malfunction
P1875
25
Ground Return Malfunction
7A2-6 TRANSMISSION CONTROL SYSTEM (JR405E)
Schematic and Routing Diagrams
Transmission Controls Schematics
Power Distribution (1)
TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-7
Power Distribution (2)
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