7A-20 AUTOMATIC TRANSMISSION (AW30-40LE)
DIAGNOSIS WITH TECH 2
In this AW30-40LE transmission, troubleshooting can be
performed for electrical faults using the Tech 2 scan tool.
If the CHECK TRANS lamp blinks, or if an electrical fault in the
transmission may probably exist, check trouble codes using
the Tech 2 scan tool.
In the diagnostic procedures described in this manual, first
repair the faulty positions indicated by trouble code in the order
of numbers and then perform troubleshooting for the faulty
positions that are not indicated by trouble code. For correct
troubleshooting, it is necessary to first repair the trouble codes
of lower-order numbers, then to repair the trouble codes of
higher-order numbers in sequence.
How to Use This Manual:
Check trouble codes using the Tech 2 scan tool.
If no codes are set:
・ Refer to Data List and identify the electrical faults that are
not indicated by trouble code.
If codes are set:
・ Record all the codes displayed by the Tech 2 and check if
the codes are intermittent (intermittent faults).
・ Clear the codes.
・ Drive the vehicle for a test to reproduce the faulty status.
・ Check trouble codes again using the Tech 2.
・ If no code is displayed by test driving, the fault is
intermittent. In this case, refer to the cautions on
intermittent conditions.
・ If a code is present, refer to “DIAGNOSTIC TROUBLE
CODES (DTC) CHECK” for diagnosis.
・ Because a code of high-order number may be set for the
reason that a code of low-order number has been set after
occurrence of a fault, perform repair work starting with a
lower-order number is ascending order.