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AUTOMATIC TRANSMISSION AND DIFFERENTIAL
IT3AOI 3-2
T TROUBLESHOOTING
1 . Supplemental Restraint System "Airbag"
Airbag system wiring harness is routed near the transmission control unit (TCU).
1. All Airbag system wiring harness and connectors are colored yellow . Do not use electrical test equipment on
these circuit .
2. Be careful not to damage Airbag system wiring harness when troubleshooting and servicing the TCU .
2. Precaution
1) Problems in the electronic-controlled automatic transmission may be caused by failure of the engine, the
electronic control system, the transmission proper, or by a combination of these . These three causes must be
distinguished clearly when troubleshooting.
2) Troubleshooting should be conducted by rotating with simple, easy operations and proceeding to complicated,
difficult operations . The most important thing in troubleshooting is to understand the customer's complaint, and
distinguish between the three causes .
3. Troubleshooting Chart for Self-diagnosis System
A: BASIC TROUBLESHOOTING PROCEDURE
TROUBLE OCCURS
1 .
Oil level check
2 .
Oil leak check
BASIC CHECKS
3 .
Brake band adjustment
4 .
Stall test
5 .
Line pressure test
6 .
Transfer clutch pressure test
TROUBLE INDICA-
7 .
Time lag test
TION (POWER INDI-
SELF-DIAGNOSIS
8 .
Road test
CATOR)
Indicated
9 .
Shift characteristics
Refer to "On-car service" [W2A0] .
Not indicated
No trouble code
I
Trouble code
Inspection using Gen-
Inspection using
eral Troubleshooting
Troubleshooting Chart
Check in accordance
Table [T6ble
OK
with Select Monitor
trouble code [T4A0]
[T5A0]
Repair
SELF-DIAGNOSIS
No trou le code
CLEAR MEMORY
Confirmation test
End
Trouble code
171
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Table of Contents
Troubleshooting
