TSRM/MK2 Supra/Repair Manual
Repair ManualWiring Diagrams
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AT/Automatic Transmission, page 9

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Automatic Transmission — MK2 Supra Automatic Transmission, page 9
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Page text (OCR transcript)
NOTE: In event of a number of trouble codes, indication
will begin from the smaller value and continue in order to
the larger.

4. After the diagnosis check, remove the service wire from
the DG terminal.

Diagnostic Code

Code No. | Light Pattern | Diagnosis System

42 | JJJJJJJ_JJJ_ | Defective No. 1 speed sensor (in combination meter)
Severed wire harness or short circuit

61 | _JJJJJJJJJJ_JJ_ | Defective No. 2 speed sensor (in ATM)
Severed wire harness or short circuit

62 | JJJJJJJJ_JJJ | Severed No. 1 solenoid or short circuit
Severed wire harness or short circuit

63 | _JJJJJJJJJ_JJJJL | Severed No. 2 solenoid or short circuit
Severed wire harness or short circuit

64 | _JJJJJJJJ_JJJJJL | Severed No. 3 solenoid or short circuit
Severed wire harness or short circuit

NOTE: If codes 62, 63 or 64 appear, there is an electrical malfunction with the solenoid.
Causes due to mechanical failure such as a stuck switch
will not appear.

CANCEL OUT DIAGNOSTIC CODE

1. After repair of the trouble area, the diagnostic code retained
in memory by the ECT ECU must be canceled out by removing the fuse ECU + B (15A) for 10 seconds or more depending on ambient temperature (the lower the
temperature, the longer the fuse must be left out) with the
ignition switch off.

NOTE:
• Cancellation can also be done by removing the battery
negative (—) terminal, but in this case other memory systems (clock, radio ETR, etc.) will also be canceled out.
• The diagnostic code can also be canceled out by disconnecting the ECT ECU connector.
• If the diagnostic code is not canceled out, it will be retained by the ECT ECU and appear along with a new code
in event of future trouble.

2. After cancellation, perform a road test, if necessary, to confirm that a "normal code" is now read on the OD OFF light.