70 Autostick Input Circuit

Part 1 Of 3:

Part 2 Of 3:

Part 3 Of 3:

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 and later - 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