Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 631
7A1–24 AUTOMATIC TRANSMISSION (4L30-E)
MEMO
AUTOMATIC TRANSMISSION (4L30-E) 7A1–25
PERFORM PRELIMINARY INSPECTION FIRST!
When the “CHECK TRANS” indicator is flashing, it
indicates that a problem related to the trans-
mission, the Transmission Control Module (TCM),
or the vehicle harness has occurred:
The system is now operating in a “BACKUP MODE”
where the risk of further damaging the transmission
has been reduced. The vehicle may be shifted
manually.
If the initial problem is intermittent or seldom,
switching OFF/ON the engine might allow normal
operation again until the problem re-occurs.
“CHECK TRANS” indicator flashing
Use “CHECK TRANS” CHECK in
Electronic Diagnosis section in this
manual
Refer to appropriate DTC chart in
Electronic Diagnosis section in this
manual.
NO DTC
ANY DTC
Read and record the Diagnostic
Trouble Codes (DTC) stored by TCM.
WARNING:
Disconnecting battery or TCM will
result in loss of stored trouble code(s).
BACKUP MODE PATTERN:
- No automatic shifting
- Manual shifting only
- “CHECK TRANS” Flashing
SHIFT LEVER
GEAR
POSITION
SELECTED
P
P
R
R
N
N
D
4
3
4
2
3
L
1
MECHANICAL/HYDRAULIC DIAGNOSIS
CHECK TRANS INDICATOR CHART
7A1–26 AUTOMATIC TRANSMISSION (4L30-E)
MECHANICAL/HYDRAULIC DIAGNOSIS SYMPTOMS INDEX
PERFORM PRELIMINARY INSPECTION FIRST!
CHART
SYMPTOMS
PAGE
1
NO ENGINE START IN NEUTRAL OR PARK
7A1-27
2
NO FORWARD GEARS IN ANY RANGE/NO REVERSE
7A1-28
3
NO ENGINE BRAKE IN ANY RANGE
7A1-29
4
POOR SHIFTING IN ALL GEARS (ALL HARSH OR ALL SOFT)
7A1-30
5a
DELAYS IN DRIVE AND REVERSE
7A1-31
5b
DELAYS IN REVERSE ONLY
6
DIAGNOSTIC TROUBLE CODE (DTC) 61
7A1-32
7
HARSH 1-2 SHIFT
7A1-33
8
HARSH 3-4 SHIFT
9a
3-2 DOWNSHIFT COMPLAINT
9b
HARSH SHIFT WHEN SHIFTING INTO “D” OR ACCELERATING
FROM STOP
7A1-34
9c
COASTDOWN HARSH SHIFT OR CLUNK AT 3-2 DOWNSHIFT
10
INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED
7A1-35
11
ENGINE FLARE AT SHIFTING DURING TURNING ONLY
7A1-36
12
ENGINE FLARE DURING 1-2 OR 2-3 SHIFT
13
SHUDDER ONLY DURING TORQUE CONVERTER CLUTCH (TCC) APPLYING
7A1-37
14
POSSIBLE CAUSES OF TRANSMISSION NOISE
7A1-38
15a
POSSIBLE CAUSES OF LOW LINE PRESSURE
7A1-39
15b
POSSIBLE CAUSES OF HIGH LINE PRESSURE
7A1-40
16
POSSIBLE CAUSES OF TRANSMISSION FLUID LEAKS
7A1-41
NOTE:
Numbers with parenthesis on the following charts refer to Parts List at end of this Section.
AUTOMATIC TRANSMISSION (4L30-E) 7A1–27
NO
NO
NO
YES
YES
YES
NO ENGINE START IN NEUTRAL
When shift lever moved from drive to
neutral mostly in hot condition
NO START IN P
(Any condition)
Replace mode switch (63)
END
END
Does
engine also not
start in neutral when
shift lever moved from
park to neutral?
Open
in neutral
start circuit of mode
switch (63)
Check
mode switch
(63) setting. Readjust
if necessary.
Problems
fixed?
( ) Refer to Parts List at the end of this Section.
CHART 1: NO ENGINE START IN NEUTRAL OR PARK
PERFORM PRELIMINARY INSPECTION FIRST!
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