reverse switch ISUZU TF SERIES 2004 Repair Manual

DIAGNOSIS (JR405E) 7A2-117
Step Action Yes No
5 Inspection of electrical or mechanical fault
Is signal to each solenoid and pressure switch changed
synchronously to the faulty gear shift?

Control Valve


TCM


B1





B12





B20 RED/YEL
WHT/BLK 2-4 Brake Pressure SW

Terminal
Assembly
YEL
E54

(7)





(12)





(1) H23

(12)





(10)C95

(1)





(12)





(20) RED/YEL
YEL
WHT/BLK
L&R Brake Pressure SW

High Clutch Pressure SW

H22

(8)
Control Valve

TCM
B6
B7
B8
B9
B22 (GND) BLU/BLK
WHT/BLU L&R Brake Solen oid

Te r m i n a l
Assembly
BLK/YEL
RED
2-4 Brake Solenoid

High Clutch Solenoid

Low Clu tch S olen oid

E54
(5)
(9)
(10)
(3)
(11)H23
(11)
(5)
(7)
(2)
(1)
GRY/REDC95
(6)
(7)
(8)
(9)
(22) BLU/BLK
BLK/YEL
RED
WHT/BLU
GRY/RED
Range TCM terminal
GearB20
(High clutch
pressure SW)B1
(2-4 brake pressure
SW)B12 (Low & reverse
brake pressure SW)P - More than 10V More than 10V More than 10VR Reverse More than 10V More than 10V -N - More than 10V More than 10V More than 10VD, 3, 2 1st More than 10V More than 10V More than 10V2nd More than 10V - More than 10V3rd - More than 10V More than 10V4th - - More than 10VL 1st More than 10V More than 10V -2nd More than 10V - More than 10V3rd - More than 10V More than 10V4th - - More than 10V
Range TCM terminal
GearB8
(High clutch
solenoid)B9
(Low clutch
solenoid)B7
(2 -4 b rake
solenoid)B6
(Lo w & reve rs e
brake solenoid)P - Approx. 6.8V
(AC range)- Approx. 6.8V
(AC range)Approx. 6.2V
(AC ra ng e)
R Reverse Approx. 6.8V
(AC range)- Approx. 6.8V
(AC range)-
N - Approx. 6.8V
(AC range)- Approx. 6.8V
(AC range)Approx. 6.8V
(AC ra ng e)
D, 3, 2 1st Approx. 6.8V
(AC range)- Approx. 6.8V
(AC range)Approx. 6.8V
(AC ra ng e)
2nd Approx. 6.8V
(AC range)- - Approx. 6.8V
(AC ra ng e)
3rd - - Approx. 6.8V
(AC range)Approx. 6.8V
(AC ra ng e)
4th - Approx. 6.8V
(AC range)- Approx. 6.8V
(AC ra ng e)
L 1st Approx. 6.8V
(AC range)- Approx. 6.8V
(AC range)-
2nd Approx. 6.8V
(AC range)- - Approx. 6.8V
(AC ra ng e)
3rd - - Approx. 6.8V
(AC range)Approx. 6.8V
(AC ra ng e)
4th - Approx. 6.8V
(AC range)- Approx. 6.8V
(AC ra ng e)
Go to Step 6
In case of fault in
the machine
system, repair that
portion or replace
the unit.
Slip of clutch or fault
of control valve.

DIAGNOSIS (JR405E) 7A2-139
No. Z11: Abnormal Oil Pressure

Description:

Oil pressure is low or high.

Possible Cause:

Basically, the same cause as "No. C1 - C8: Engine races up (slip) by shift up or shift down" is considered.

In case of oil pressure is low, faulty oil pump is considered.




No. Z12: Reverse Buzzer Does Not Ring

Description:

Reverse buzzer does not ring in R range.

Possible Cause:

Disordered select cable.

Disordered select lever.

Disordered inhibitor switch.

7A2-140 DIAGNOSIS (JR405E)
STALL TEST
CAUTION:
Because A/T may break down, do not perform the stall test continuously.

Procedure
1. Chock the four wheels.
2. Warm up the engine.
3. Apply the parking brake.
4. Step on the foot brake fully.
5. Set the select lever to either D, 3, 2, L or R range.
6. Step on the accelerator pedal fully.
7. When the engine speed becomes constant, record tha
t
value quickly.

Stall Speed
Standard: 2600±150 rpm

Evaluation
1. If the stall speed is higher than standard value in all
ranges.

Low line pressure.

Abraded oil pump.

Faulty operation of low clutch.

Adjustment error of or faulty inhibitor switch.


ATF leaking from oil pump, control valve, or
transmission case.

Fixed pressure regulator valve and pilot valve.
2. If the stall speed is higher than standard value in D, 3, 2
and L ranges.

Slip of low clutch.

Slip of low one-way clutch.
3. If the stall speed is higher than standard value in
R
range.

Slip of low & reverse brake.

Slip of reverse clutch.
4. If the stall speed is lower than standard value in all
ranges.

Slip of one-way clutch (in torque converter).

Faulty engine.

7A2-156 DIAGNOSIS (JR405E)
No. Wire
Color Pin Name Input /
OutputConnected toMeasurement
Item Measurement
Condition StandardInspection
Point at
Trouble
At lamp OFF 10 – 14.5V Related
harness A24 GRN/
YEL Power Drive Select Switch InputPower drive
switch Voltage
At lamp ON Less than 2V Lamp
At other than
2nd or 4th
gear More than 10
V Related
harness
B1 RED/
YEL 2-4 Brake Pressure Switch Input2-4 brake
pressure switch Voltage
At 2nd or 4th
gear Less than 2VPressure
switch
At 2 range 10 – 14.5V Related
harness
B2 PNK/
BLK 2 Range Switch Input Inhibitor switch Voltage
At other than
2 range Less than 2VInhibitor
switch
InputRelated
harness
B3 BRN/
RED Turbine Sensor

Turbine sensor Voltage (Wave
form) At run in L
range in 1st
gear 20 km/h.
Circuit tester
(+) to B3 pin,
(-) to B5 pin. Pulse
generated (At
AC range
approx. 6.5V)Turbine
sensor
ATF temp.
20
C Approx. 1.55
V Related
harness
B4 BLU ATF Thermo Sensor InputATF thermo
sensor Voltage
ATF temp.
60
C Approx. 0.7VThermo
sensor
B5 BLK Ground - Ground Voltage Normally Less than 2VRelated
harness
Related
harness
B6 BLU/
BLK Low & Reverse Brake Duty Solenoid OutputLow & reverse
brake duty
solenoid Voltage (Wave
form) P, N range.
Circuit tester
(+) to B6 pin,
(-) to B22 pin. Pulse
generated (At
AC range
approx. 6.2V)Duty solenoid
Related
harness
B7 BLK/
YEL 2-4 Brake Duty Solenoid Output2-4 brake duty
solenoid Voltage (Wave
form) P, N range.
Circuit tester
(+) to B7 pin,
(-) to B22 pin. Pulse
generated (At
AC range
approx. 6.2V)Duty solenoid
Related
harness
B8 RED High Clutch Duty Solenoid OutputHigh clutch duty
solenoid Voltage (Wave
form) P, N range.
Circuit tester
(+) to B8 pin,
(-) to B22 pin. Pulse
generated (At
AC range
approx. 6.2V)Duty solenoid
Related
harness
B9 WHT/
RED Low Clutch Duty Solenoid OutputLow clutch duty
solenoid Voltage (Wave
form) 4th gear in D
range. Circuit
tester (+) to
B9 pin, (-) to
B22 pin. Pulse
generated (At
AC range
approx. 6.2V)Duty solenoid
At N range 10 – 14.5V Related
harness
B10 RED/
BLK N Range Switch Input Inhibitor switch Voltage
At other than
N range Less than 2VInhibitor
switch
At D range 10 – 14.5V Related
harness
B11 BLU D Range Switch Input Inhibitor switch Voltage
At other than
D range Less than 2VInhibitor
switch

DIAGNOSIS (JR405E) 7A2-157
No. Wire
Color Pin Name Input /
OutputConnected toMeasurement
Item Measurement
Condition StandardInspection
Point at
Trouble
At other than
R range, L
range 1st gear More than 10
V Related
harness
B12 YEL Low & Reverse Brake Pressure Switch InputLow & reverse
brake pressure
switch Voltage
At R range, L
range 1st gear Less than 2VPressure
switch
Related
harness
B13 YEL/
RED Vehicle Speed Sensor InputVehicle speed
sensor Voltage (Wave
form) At run in L
range in 1 st
gear 20 km/h.
Circuit tester
(+) to B13 pin,
(-) to B5 pin. Pulse
generated (At
AC range
approx. 6.8V)Vehicle
speed sensor
B14 BLU/
BLK ATF Thermo Sensor Ground - ATF thermo
sensor Continuity Normally Continuity Related
harness
B15 BLK Ground - Ground Voltage Normally Less than 2VRelated
harness
B16 - - - - - - - -
At lock-up.
Circuit tester
(+) to B17 pin,
(-) to B5 pin. Pulse
generated (At
AC range
approx. 2.2 -
9.0V) Related
harness
B17 BLK Lock-up Duty Solenoid OutputLock-up duty
solenoid Voltage (Wave
form)
At unlock-up.
Circuit tester
(+) to B17 pin,
(-) to B5 pin. Pulse
generated (At
AC range
approx. 1.0 -
2.0V) Duty solenoid
At key switch
ON 10 – 14.5V Related
harness
B18 WHT V ign (Ignition Power Supply) Input Key switch Voltage
At key switch
OFF Less than 2V Fuse
At R range 10 – 14.5V Related
harness
B19 RED/
YEL R Range Switch Input Inhibitor switch Voltage
At other than
R range Less than 2VInhibitor
switch
At other than
3rd or 4th
gear More than 10
V Related
harness
B20 WHT/
BLK High Clutch Oil Pressure Switch InputHigh clutch
pressure switch Voltage
At 3rd or 4th
gear Less than 2VPressure
switch
At L range 10 – 14.5V Related
harness
B21 PNK/
BLK L Range Switch Input Inhibitor switch Voltage
At other than
L range Less than 2VInhibitor
switch
B22 GRY/
RED Ground Return Output Shift solenoid Continuity Normally Continuity Related
harness
At N range 10 – 14.5V Related
harness
B23 VIO Line Pressure Solenoid OutputLine pressure
solenoid Voltage
At D range
stall Less than 2V Solenoid

7A3-16 ON-VEHICLE SERVICE (JR405E)
SOLENOIDS, OIL PRESSURE SWITCH AND OIL TEMPERATURE
SENSOR
244L300003
Legend
1. High clutch oil pressure switch connector
(wire color: Gray)
2. 2-4 brake oil pressure switch connector
(wire color: Brown)
3. Low and reverse brake oil pressure switch connector
(wire color: White)
4. Low and reverse brake duty solenoid connector
(wire color: Pink and White)
5. High clutch duty solenoid connector
(wire color: Green and Gray)

6. Lock-up duty solenoid connector
(wire color: Yellow and Black)
7. 2-4 brake duty solenoid connector
(wire color: Blue and Brown)
8. Low clutch duty solenoid connector
(wire color: Orange and Black)
9. Line pressure solenoid connector
(wire color: Pink)

UNIT REPAIR (JR405E) 7A4-15
244L300003
Legend
1. High clutch oil pressure switch connector
(wire color: Gray)
2. 2-4 brake oil pressure switch connector
(wire color: Brown)
3. Low and reverse brake oil pressure
switch connector (wire color: White)
4. Low and reverse brake duty solenoid
connector (wire color: Pink and White)
5. High clutch duty solenoid connector
(wire color: Green and Gray)


6. Lock-up duty solenoid connector (wire
color: Yellow and Black)
7. 2-4 brake duty solenoid connector (wire
color: Blue and Brown)
8. Low clutch duty solenoid connector (wire
color: Orange and Black)
9. Line pressure solenoid connector (wire
color: Pink)

UNIT REPAIR (JR405E) 7A4-23

CONTROL VALVE LOWER BODY

10CV11
Legend
1. Retainer plate, spring, and steel ball
2. Retainer plate, plug, spring, and
pressure regulator valve
3. Retainer plate, spring, and high clutch
accumulator
4. Retainer plate, plug, low and reverse
brake fail valve A, and spring
5. Retainer plate, plug, spring, and fail
valve
6. Retainer plate, plug, low and reverse
brake amp valve, and spring
7. Oil pressure switch
8. Oil filter
9. Solenoid
10. Line pressure solenoid
11. Lock-up solenoid

12. Harness bracket
13. Solenoid fixing plate
14. Harness assembly
15. Retainer plate, plug, spring, and 2-4
brake fail valve A
16. Retainer plate, plug, spring, and low
clutch amp valve B
17. Retainer plate, spring, and torque
converter relief valve
18. Oil strainer
19. Control valve lower body
20. Retainer plate, spring, and 2-4 brake
solenoid accumulator
21. Oil pressure switch

UNIT REPAIR (JR405E) 7A4-27

Spring specifications
No. Valve nomenclature Free length
(mm / in) Outside
diameter (mm
/ in) Linear
diameter (mm
/ in) Number of
coils
14 Pressure relief 49.0 / 1.929 7.6 / 0.299 1.1 / 0.043 17.3
15 Pressure regulator 30.5 / 1.201 14.0 / 0.551 1.4 / 0.055 5.7
16 Low and reverse brake fail (A) 22.0 / 0.866 7.0 / 0.276 0.6 / 0.024 10.0
17 Fail 23.0 / 0.906 11.0 / 0.433 0.5 / 0.020 13.2
18 Low and reverse brake amp 19.5 / 0.768 7.9 / 0.311 0.5 / 0.020 6.9
19 2 – 4 brake fail (A) 24.8 / 0.976 8.5 / 0.335 0.9 / 0.035 7.8
20 Low clutch amp (B) 26.0 / 1.024 11.0 / 0.433 0.5 / 0.020 6.9
21
Torque converter relief More than 47.2
/ 1.858 9.2 / 0.362 1.6 / 0.063 20.2
22 2 – 4 brake solenoid accumulator 31.4 / 1.236 9.8 / 0.386 1.3 / 0.051 9.3
23 High clutch accumulator 51.0 / 2.008 6.5 / 0.256 0.8 / 0.031 23.5

Oil pressure switch
Apply compressed air (392 kPa/4.0 kg/cm2) to the oil pressure
switch to check the oil pressure switch continuity between the
connector and screw.






244L300011

Oil temperature sensor (harness assembly)
Check the oil temperature sensor resistance between harness
terminals 7 and 6 (ground).

Oil temperature sensor resistance: 2,400




2,600 ohms
(20
 )


Solenoid
Measure the resistance of each solenoid.

Resistance:
Brown connector – 3.0
 3.4 ohms (20
 C)
Gray connector – 12.0
 13.2 ohms (20
 C)
White connector – 12.2
 13.4 ohms (20
 C)

Reassembly steps

Coat the parts with ATF before installing them.

Install the control valve to the control valve lower body.

Install the oil filter to the control valve lower body.