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Gm Mode 22 Scan Tool By Terry File

Unlocking the Power of the GM Mode 22 Scan Tool: A Deep Dive into Terry’s Custom Solution

Best for:

• Example: A generic tool shows "Transmission Temp." The Terry Tool would show "TCC Slip RPM" and "Commanded Gear vs. Actual Gear" side-by-side with a "Slip Graph" overlay.
• Cylinder Balance Test: A specific bi-directional control menu allowing the user to kill individual injectors (Cylinder Cutout) to listen for RPM drops, graphing the drop percentage for each cylinder to identify a weak injector or compression issue.

• The Feature: Set a trigger. For example: "Start recording when MAP sensor exceeds 90 kPa." This allows the user to capture intermittent glitches without staring at the screen for hours.

Bi-Directional Light: While primarily a data logger, certain versions of these custom Mode 22 scripts allow for basic "active tests," such as cycling a cooling fan or testing an EVAP solenoid. gm mode 22 scan tool by terry

The GM Mode 22 Scan Tool by Terry is a specialized, often free software utility designed for deep-level diagnostics on General Motors vehicles, typically used in conjunction with low-cost ELM327 OBD2 interfaces. Overview of the Tool Unlocking the Power of the GM Mode 22