Isuzu Trooper (1998-2002 year). Manual — part 704
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–13
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 general troubleshooting chart on the following page should speed the procedure.
7A–14
AUTOMATIC TRANSMISSION (AW30-40LE)
821RY00012
F07LV002
740RY00013
740RY00014
SELF-DIAGNOSIS
Warning to the driver
• When trouble has occurred to throttle position sensor, output
revolution sensor, input revolution sensor, neutral start
switch, engine revolution signal, speed meter signal, or
solenoids, "CHECK TRANS" lamp is blinked (1.25 Hz) even
during driving to warn the driver.
• The trouble is recorded by trouble code in 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.
Self-diagnosis code (Flashing code) display
• For quick search for faulty parts, 12 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 data link
connector with a lead wire.
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–15
F07LV001
Indication Method:
1. Terminals No. 11 are No. 4 or 5 (ground) of data link
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 data link connector.
Be careful shorting with a lead wire, etc.
(The vehicle side of control module may be damaged.) For
identification of trouble code, connect Tech2 to data link
connector.
Clear of trouble code memory
1. Clear the trouble code memory using F1: Clear DTC
Information for Tech2.
2. After more than 1 second has elapsed after the ignition key
has been turned ON, short between No. 11 and No. 4 or 5
(ground) of data link connector. Then, after 1 second, but
within 6 seconds, discontinue shorting.
7A–16
AUTOMATIC TRANSMISSION (AW30-40LE)
Flashing code
F07RY00016
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