Output Test Mode

Description
The Output Test Mode (OTM) aids in repairing output actuators associated with the PCM. It allows the technician to energize and de-energize most of the system output actuators on command. When entering OTM, the outputs can be turned off and on without controlling the cooling tans. The low and high speed cooling fans may be turned on separately without energizing the other outputs.

Diagnostic Tool
Enter Output Test Mode with the ignition key ON and the engine off.
1. Perform the necessary vehicle preparation and visual inspection.
2. Connect the diagnostic tool to the OBD II DLC.
3. Turn key ON.
4. Select VEHICLE & ENGINE SELECTION menu.
5. Select NEW VEHICLE YEAR & MODEL.
6. Enter year, engine, model with the appropriate qualifier, if needed (i.e., transmission, 49 state or California).
7. Select DIAGNOSTIC DATA LINK.
8. Select PCM - POWERTRAIN CONTROL MODULE.
9. Select ACTIVE COMMAND MODES.
10. Follow operating instructions from the menu.
11. Select the mode (i.e., HIGH SPEED FAN or LOW SPEED FAN).
12. Select menu option to turn outputs ON (may link up to PIDs).
13. Select menu option to turn outputs OFF.