Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual — part 367

7A-16 AUTOMATIC TRANSMISSION (AW30-40LE)

DIAGNOSIS

BASIC TROUBLESHOOTING

AW30-40LE transmission, called Electronic Controlled Transmission (ECT), differs from oil pressure control type
transmissions in that it is controlled by a microcomputer. Accordingly, its troubleshooting procedure differs also.
Before troubleshooting an ECT, first determine whether the problem is electrical or mechanical. To do this, just refer
to the basic troubleshooting flowchart provided below.
If the cause is already known, using the basic troubleshooting chart below along with the troubleshooting chart
should speed the procedure.

F07R200005

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-17

UBS

825R200084

TFR/S

825R200085

SELF DIAGNOSIS

Warning to the driver

・ When trouble has occurred to throttle position sensor,

vehicle speed sensor, or solenoid, “CHECK TRANS” lamp
is blinked (1.25 Hz) even during driving to warn the driver.

・ The trouble is recorded by trouble code is TCM.

・ When temporary trouble has been shooted, the “CHECK

TRANS” lamp stops blinking. This blinking can be stopped
by setting the ignition key off. But the trouble code remains
memorized in TCM.

F07LV002

7A-18 AUTOMATIC TRANSMISSION (AW30-40LE)

UBS (RHD)

740RY00013

UBS (LHD)

740RY00014

Self-diagnosis code display

・ For quick search for faulty parts, 6 different items of

trouble code are indicated by “CHECK TRANS” lamp
blinking.

・ The storaged trouble codes can be identified by shorting

the terminals No.11 and No.4 or 5 (ground) of diagnosis
connector with a lead wire.

TFR/S

740R200046

AUTOMATIC TRANSMISSION (AW30-40LE) 7A-19

F07LV001

Indication Method:
(1) Terminals No.11 and No.4 or 5 (ground) of diagnosis

connector are short circuited.

(2) Turn the ignition key to the ON position.
(3) In case there no trouble, normal code is indicated.
(4) In case a plurality of trouble codes have occurred at a

time, each code is indicated three times in numerical
order.

NOTE:
Power line runs through diagnosis connector.
Be careful shorting with a lead wire, etc.
(The vehicle side of control module may be damaged.)
For identification of trouble code, connect Tech 2 to
diagnosis connector.

Clear of trouble code memory
1. Clear the trouble code memory using F1: Clear DTC

Information for Tech 2.

2. Shorting terminals for 3-4 second between No.11 and

No.4 or 5 (ground) of diagnosis connectors after the
ignition key tuned to the on position for 1 second of longer.

・ After erasing trouble code, check to see if the normal code

is outputted through running test.

Trouble code

Trouble

Code

Mode

Diagnostic area and Failure

11

Vehicle speed sensor 2 (Transmission mounting)
Open or shorted circuit

21

Throttle position sensor input
Open or shorted circuit

24

Vehicle speed sensor 1 (In speedometer)
Open or shorted circuit

31

Shift solenoid S1
Open or shorted circuit

32

Shift solenoid S2
Open or shorted circuit

33

Lock-up solenoid S3
Open or shorted circuit

F07L100030