Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Service manual - part 638

7A1–52 AUTOMATIC TRANSMISSION (4L30-E)

FLASHING CODES

1.

ON BOARD DIAGNOSIS (SELF-DIAGNOSIS)
(1) The Transmission Control Module (TCM)

conducts a self-test of most of the wiring and
components in the system each time the key is
turned ON. If a fault is detected the TCM will store
a Diagnostic Trouble Code (DTC) in memory. It’s a
number that corresponds to a specific problem.

(2) When the problem detected is important: the

CHECK TRANS indicator is flashing (turned ON
0.2 seconds and OFF 0.2 seconds) until the fault is
repaired and the TCM memory is cleared.

ON

OFF

IGN Key ON

3 Sec.

(Lamp check)

ON

OFF

IGN Key ON

3 Sec. 

(Lamp check)

0.2 Sec.

(2.5 Hz)

3.2 Sec.

0.2 Sec.

Normal

Abnormal

2.

DIAGNOSTIC TROUBLE CODES (DTC)
(1) DTC can be displayed by the Transmission

Control Module (TCM) by shorting together
terminals 11 and 4 or 5 (ground) of the TCM
Diagnosis Connector (C-102) located driver
compartment.
(This grounds the TCM pin D16).

826RV061

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

9

AUTOMATIC TRANSMISSION (4L30-E) 7A1–53

ON

OFF

Diagnostic test start

0.4 Sec.

0.4 Sec.

3.2 Sec.

0.4 Sec.

0.4 Sec.

(1.25 Hz)

ON

OFF

The trouble code(s) will flash 3 times.
Example: DTC 11 x 3 (times), DTC 32 x 3 (times)

3.2 Sec.

0.4 Sec. 0.4 Sec.

0.4 Sec.

0.4 Sec.

0.4 Sec.

1.2 Sec.

1.2 Sec. 0.4 Sec.

Diagnostic test start

Normal

Abnormal

(2) After this, the CHECK TRANS Indicator will be OFF

for 3.2 second and then will flash each DTC 3
times.
1 When there are more than 9 flashes this

means that the indicator is constantly flashing,
OFF for 0.4 seconds, ON for 0.4 seconds. In
this case there is no DTC stored in memory.

•

To find the problem without a scan tool and
without DTC GOTO WITHOUT DTC SET.

2 When there are less than 9 flashes you will

see DTC of 2 digits repeated 3 times each and
when all codes have been displayed they are
displayed again beginning from the first one.

3 Do not care about the DTC order : if “21” is

before “22” it does not matter.

4 Write down all codes numbers and GOTO DTC

CHECK.

(3) IF CHECK TRANS indicator is not flashing GOTO

“CHECK TRANS” CHECK.

7A1–54 AUTOMATIC TRANSMISSION (4L30-E)

TECH2 CONNECTION
In order to access Transmission Control Module (TCM)
data, use of the TECH2 scan tool is required.

1.

The electronic diagnosis equipment is composed of:
(1) TECH2 (3000094) hand-held scan tool, and DLC

cable (3000095).

(2) SAE 16/19 adapter (3000098) (1), RS 232 loop back

connector (3000112) (2), and PCMCIA card
(3000117) (3).

901RW176

F07RW033

1

2

3

AUTOMATIC TRANSMISSION (4L30-E) 7A1–55

2.

Connecting the TECH2

NOTE:

Always observe instructions in the TECH2 and Isuzu
System PCMCIA card.
Before operating the Isuzu PCMCIA card with the TECH2,
the following steps must be performed:

1.

The Isuzu98 System PCMCIA card (1) inserts into the
TECH2 (5).

2.

Connect the SAE 16/19 adapter (3) to the DLC
cable(4).

3.

Connect the DLC cable to the TECH2 (5).

4.

Make sure the vehicle ignition is off.

1

5

4

3

2

Legend

1. PCMCIA Card
2. RS232 Loop Back Connector
3. SAE 16/19 Adaper
4. DLC Cable
5. Tech2

901RW180