Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Service manual — part 1762
DIAGNOSIS 7A2-99
Step
Action
Yes
No
4
Are the quantity, contamination and smell normal?
If the ATF level is
low, replenish up to
the specified level.
Go to Step 5
If ATF is extremely
black and
contaminated and
smells burnt, slip of
the clutch is
supposed.
Overhaul the AT
unit.
5
Inspection of inhibitor switch using a Tech 2 or circuit tester.
When the select lever is operated, is the data display in the Tech 2
correct or voltage at each range correct?
Inhibitor SW
TCM
A2 (P)
A17 (3)
B2 (2)
B10 (N)
B11 (D)
B19 (R)
B21 (L)
C95
(2)
(10)
(11)
(19)
(21)
YEL/VIO
RED/BLK
BLU
BLK/GRN
Starter Relay
C94
(2)
(3)
B
H22
(1)
(6)
(4)
(7)
(5)
(2)
P
2
R
N
D
3
L
Start SW
PNK/BLU
E51
(2)
(4)
(8)
(5)
(1)
(9)
(6)
(3)
(10)
(7)
(38)
(15)
(3)
(37)
H4
PNK/BLK
RED/YEL
YEL/VIO
BLK/GRN
PNK/BLK
RED/BLK
BLU
RED/YEL
PNK/BLU
BLK/WHT
BLK
BLK
BLK/WHT
Key Switch
WHT
WHT
Immobiliser Control Unit
TCM terminal
Range
A2
B19
B10
B11
B17
B2
B21
P
Battery
voltage
-
-
-
-
-
-
R
-
Battery
voltage
-
-
-
-
-
N
-
-
Battery
voltage
-
-
-
-
D
-
-
-
Battery
voltage
-
-
-
3
-
-
-
-
Battery
voltage
-
-
2
-
-
-
-
-
Battery
voltage
-
L
-
-
-
-
-
-
Battery
voltage
Go to Step 6
Adjust the inhibitor
switch.
7A2-100 DIAGNOSIS
Step
Action
Yes
No
6
Inspect the output voltage and throttle opening signal of the throttle
position sensor using a Tech 2 or circuit tester.
Is a voltage value in proportion to the throttle opening output?
TPS
TCM
A16
C56
(28)
C94
(16)
RED/WHT
C56
(49)
(38)
(57)
(69)
ECM
A47 (GND)
A35 (Output)
A26
A55 (+5V)
A69 (Idle SW)
Go to Step 7
Repair the defect or
replace.
7
Check of power supply to and earth of TCM.
Are the power supply and earth proper?
TCM
A1 (+B)
B5
B15
H23
(15)
C95
(5)
(15)
BLK/YEL
BLK
BLK
Battery
C94
(1)
BLK
Go to Step 8
Check the power
source harness and
earth harness (bolt
tightening to the
body).
8
Is the stall revolution correct in D, 3, 2 and L range? Refer the
STALL TEST section in this manual.
Go to Step 6
Repair the defect or
replace.
9
Is the line pressure correct? Refer the LINE PRESSURE TEST
section in this manual.
Trouble in the AT
assembly or control
valve.
Repair the defect or
replace.
DIAGNOSIS 7A2-101
No. B3: Engine Race Up During Starting (Slip)
Description:
•
The engine speeds up but vehicle speed does not increase when the accelerator pedal is stepped on at the
starting.
Diagnosis Hints:
•
Possibility of slip of clutch is supposed. If slip of clutch has occurred, a DTC of "Gear ratio error" is stored.
Possible Cause:
•
Slip
of
clutch.
If slip of clutch is caused, a DTC (gear ratio error) is stored.
•
Dropped line pressure.
•
Trouble in control valve body (faulty operation, sticking, clogged oil passage).
7A2-102 DIAGNOSIS
Step
Action
Yes
No
1
Gear ratio trouble diagnosis.
Travel in the following sequence for about 7 seconds or more in
each range: Start in the L range (1st) to 2 range (2nd) to 3 range
(3rd) to D range (4th) (to detect the gear ratio trouble exactly, this
process should be carried out)
Go to Step 2
Go to Step 2
2
Are any DTCs stored?
Go to DTC Chart
Go to Step 3
3
Are the quantity, contamination and smell normal?
If the ATF level is
low, replenish up to
the specified level.
Go to Step 4
If ATF is extremely
black and
contaminated and
smells burnt, slip of
the clutch is
supposed.
Overhaul the AT
unit.
4
Are the engine speed and other engine system correct?
Go to Step 5
Repair the defect or
replace.
5
Inspection of electrical or mechanical fault
Is the signal from each pressure switch changed synchronously?
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)
Range
TCM terminal
Gear
B20
(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 10V
R
Reverse
More than 10V
More than 10V
-
N
-
More than 10V
More than 10V
More than 10V
D, 3, 2
1st
More than 10V
More than 10V
More than 10V
2nd
More than 10V
-
More than 10V
3rd
-
More than 10V
More than 10V
4th
-
-
More than 10V
L
1st
More than 10V
More than 10V
-
2nd
More than 10V
-
More than 10V
3rd
-
More than 10V
More than 10V
4th
-
-
More than 10V
Go to Step 6
Repair the defect or
replace.
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