70 Autostick Input Circuit

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THEORY OF OPERATION:
In the AutoStick Mode (manual shift mode), upshifts and downshifts are actuated manually. Shift- requests are detected by monitoring-the-upshift and downshift switches. The Transmission Control Module (TCM) monitors the below set conditions. A set condition will be tolerated for up to 15 seconds before setting a code.

LIMP-IN:
NO

WHEN MONITORED/SET CONDITIONS:
Whenever the engine is running.
- The transmission shift lever is not in the AutoStick and either the upshift or downshift switches are closed
- Both the upshift and downshift switches are closed at the same time.

TRANSMISSION EFFECTS:
96 model year - All AutoStick applications - The "3" position shift schedule that is used in non-Autostick applications is substituted while operating in the autostick gear selector position. No limp-in mode occurs.

97 model year - All AutoStick applications - The "OD" position shift schedule is substituted while operating in the autostick gear selector position. No limp-in mode occurs.

POSSIBLE CAUSES:
- Wiring or connector problems
- AutoStick switch failure
- Defective TCM