Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 633
7A1–32 AUTOMATIC TRANSMISSION (4L30-E)
CHART 6: DIAGNOSTIC TROUBLE CODE (DTC) 61
PERFORM PRELIMINARY INSPECTION FIRST!
DTC 61 sets.
Check line
pressure
Check
3rd gear in “D”
in winter mode.
Does vehicle
move?
Check for suspected conditions
modifying delays to clutch apply:
– Overrun clutch seal damaged
– Excessive overrun clutch piston
travel
– Defective 3-4 accumulator piston
– Causes of internal leaks
– Causes of burned clutch plates
Low line pressure
Use CHART 15a: POSSIBLE CAUSES
OF LOW LINE PRESSURE on page
7A1-39
Refer to Line Pressure chart
(
in this Section.
)
Normal line pressure
1st and 4th gear missing
or 2nd and 3rd gear
missing
Shift solenoid A stuck.
Replace shift solenoid A.
1st and 2nd gear missing
or 3rd and 4th gear
missing
Check appropriate shift
valve
If OK replace solenoid
DTC 61 is set in “D” range
1st gear above 3500 rpm
Check for suspected conditions
modifying delays to clutch apply:
– 2nd clutch seal damaged
– Excessive 2nd clutch piston travel
– Defective accumulator piston
– Causes of internal leaks
– Check ball missing or out of
location in 2nd clutch
– Seals cut, damaged or missing
– Gaskets defective
– Causes of burned clutch plates
DTC 61 is set in “D” range
3rd gear between 55-80
mph *
Check for suspected conditions
modifying delays to clutch apply:
– 4th clutch seal damaged
– Excessive 4th clutch piston travel
– Defective 3-4 accumulator piston
– Causes of internal leaks
– Causes of burned clutch plates
No engine brake in any
range
(All ranges in Drive &
Reverse are OK)
YES
NO
* Perform this test within safe and legal limits.
AUTOMATIC TRANSMISSION (4L30-E) 7A1–33
CHART 7: HARSH 1-2 SHIFT
PERFORM PRELIMINARY INSPECTION FIRST!
CHART 8: HARSH 3-4 SHIFT
PERFORM PRELIMINARY INSPECTION FIRST!
( ) Refer to Parts List at the end of this Section.
Check
line pressure
Refer to Line Pressure chart
(
in this Section.
)
Normal line pressure
Check for 1-2 accumulator valve (320)
stuck by foreign material in main case
valve body
Use CHART 15b: POSSIBLE CAUSES
OF HIGH LINE PRESSURE on page
7A1-40
High line pressure
Check
line pressure
Refer to Line Pressure chart
(
in this Section.
)
Normal line pressure
Check for 3-4 accumulator valve (407)
stuck in adapter case valve body (401)
Use CHART 15b: POSSIBLE CAUSES
OF HIGH LINE PRESSURE on page
7A1-40
High line pressure
Check for 3-4 accumulator piston (18)
stuck in adapter case (20)
7A1–34 AUTOMATIC TRANSMISSION (4L30-E)
CHART 9a: 3-2 DOWNSHIFT COMPLAINT
PERFORM PRELIMINARY INSPECTION FIRST!
CHART 9b: HARSH SHIFT WHEN SHIFTING INTO "D" OR ACCELERATING FROM STOP
PERFORM PRELIMINARY INSPECTION FIRST!
CHART 9c: COASTDOWN HARSH SHIFT OR CLUNK AT 3-2 DOWNSHIFT
PERFORM PRELIMINARY INSPECTION FIRST!
( ) Refer to Parts List at the end of this Section.
Check
line pressure
Refer to Line Pressure chart
(
in this Section.
)
Normal line pressure
Replace band apply solenoid (PWM)
(323)
Use CHART 15a: POSSIBLE CAUSES OF
LOW LINE PRESSURE on page 7A1-39
Low line pressure
Check
line pressure
Refer to Line Pressure chart
(
in this Section.
)
Normal line pressure
Replace band apply solenoid (PWM)
(323)
Use CHART 15b: POSSIBLE CAUSES OF
HIGH LINE PRESSURE on page 7A1-40
High line pressure
Check
line pressure
Refer to Line Pressure chart
(
in this Section.
)
Normal line pressure
Replace band apply solenoid (PWM)
(323)
Use CHART 15b: POSSIBLE CAUSES OF
HIGH LINE PRESSURE on page 7A1-40
High line pressure
AUTOMATIC TRANSMISSION (4L30-E) 7A1–35
CHART 10: INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED
PERFORM PRELIMINARY INSPECTION FIRST!
Check for
consistent speed
sensor reading
with TECH2
OK
OK
Check for wiring harness damage
or short to ground
Check transmission speed sensor
connections
Replace transmission speed
sensor
NOT OK
OK
Replace mode switch for intermittent
contact
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