Output Diagnostic Test Mode

The Output Test Mode (OTM) aids in servicing output actuators associated with the Powertrain Control Module (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 fans. The low and high speed cooling fans may be turned ON separately without energizing the other outputs.

New Generation STAR (NGS) Tester
Enter Output Test Mode with the ignition key ON and the engine OFF.
1. Perform the necessary vehicle preparation and visual inspection.
2. Connect NGS to 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 Powertrain Control Module (PCM).
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.