TSRM/MK4 Supra/Repair Manual
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ATTE/A340 Automatic Trans (GTE) — Inspection Procedure, page 96

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p.097
Inspection Procedure — MK4 Supra A340 Automatic Trans (GTE), page 96
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Page text (OCR transcript)
AT2–96
A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING

INSPECTION PROCEDURE

1 Check harness and connector between ECM and TRAC ECU (See page IN–30).

OK                              NG    Repair or replace harness or connector.

2 Check diagnostic trouble code of TRAC ECU (See page BR–128).

OK                              NG    Substitute another TRAC ECU.

If the same code is still output after the diagnostic trouble code is deleted, check the contact condition of each connection.
If the connections are normal, the TRAC ECU may be defective.