Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Service 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!