2004 ISUZU TF SERIES Workshop Manual

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Page 4145 of 4264

ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-153

Page 4146 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-154 DIAGNOSIS (JR405E)
TCM VOLTAGE CHECK

TCM voltage check is done to check for transmission and TCM
problems which cannot be detected by self-diagnosis.
Additionally, it severs a

Page 4147 of 4264

ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-155
No. Wire
Color Pin Name Input /
OutputConnected toMeasurement
Item Measurement
Condition StandardInspection
Point at
Trouble
Related
harness
Engine
Speed
Sensor

DIAGNOSIS (JR405E) 7A2-155
No. Wire
Color Pin Name Input /
OutputConnected toMeasurement
Item Measurement
Condition StandardInspection
Point at
Trouble
Related
harness
Engine
Speed
Sensor A7 BLK/
RED Engine Speed Sensor Input ECM Voltage (Wave
form) At 2000rpm.
Circuit tester
(+) to A7 pin,
(-) to B5 pin. Pulse
generated (At
AC range
approx. 6.2V)
ECM
A8 - - - - - - - -
A9 - - - - - - - -
Related
harness
Speed
sensor
Speed meter
A10 BLK/
YEL Vehicle Speed Sensor Out (2WD Only) Output Speed meter Voltage (Wave
form) At run in L
range in 1st
gear 20 km/h.
Circuit tester
(+) to A10 pin,
(-) to B5 pin. Pulse
generated (At
AC range
approx. 6.5V)
TCM
At switch
pushed Less than 2VRelated
harness
A11 GRN/
WHT 3rd Start Select Switch Input 3rd start switch Voltage
At switch off 10 – 14.5V 3rd start
switch
At 4L Less than 2VRelated
harness
A12 BLU/
WHT 4L Mode Switch (4WD Only) InputTransfer control
unit Voltage
At other than
4L 10 – 14.5V 4L switch
A13 - - - - - - - -
A14 - - - - - - - -
A15 - - - - - - - -
At fully close Off duty 10%Related
harness
ECM A16 RED/
WHT Throttle Position Sensor Input ECM Wave form
(140Hz Duty
signal) *1
At fully open Off duty 90%Throttle
position
sensor
At 3 range 10 – 14.5V Related
harness
A17 BLK/
GRN 3 Range Switch Input Inhibitor switch Voltage
At other than
3 range Less than 2VInhibitor
switch
At key switch
ON 10 – 14.5V Related
harness
A18 YEL/
BLK DIAG Switch InputData link
connector Voltage
At short circuit
of DIAG
switch Less than 2VRelated
harness
At lamp OFF 10 – 14.5V Related
harness A19 ORG/
BLU A/T OIL TEMP Indicator Lamp OutputAT OIL TEMP
indicator lamp Voltage
At lamp ON Less than 2V Lamp
At lamp OFF 10 – 14.5V Related
harness A20 GRN/
YEL CHECK TRANS Indicator Lamp OutputCHECK TRANS
indicator Lamp Voltage
At lamp ON Less than 2V Lamp
At lamp OFF 10 – 14.5V Related
harness A21 PNK POWER DRIVE Indicator Lamp OutputPOWER DRIVE
indicator lamp Voltage
At lamp ON Less than 2V Lamp
A22 - - - - - - - -
A23 - - - - - - - -

Page 4148 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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
har

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.
20C Approx. 1.55
V Related
harness
B4 BLU ATF Thermo Sensor InputATF thermo
sensor Voltage
ATF temp.
60C 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

Page 4149 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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 ge

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

Page 4150 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-158 DIAGNOSIS (JR405E)
No. Wire
Color Pin Name Input /
OutputConnected toMeasurement
Item Measurement
Condition StandardInspection
Point at
Trouble
At key switch
ON 10 – 14.5V Related

Page 4151 of 4264

ISUZU TF SERIES 2004 Workshop Manual DIAGNOSIS (JR405E) 7A2-159
Low & Reverse Brake Duty Solenoid Reference Wave Form
Measurement Terminal: B6 (+) B22 (-)
Measurement Scale: 5V/div 10ms/div
Measurement Condition: P, N range in idle
0

Page 4152 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-160 DIAGNOSIS (JR405E)
MEMO

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