GR___CM In DRIVE MODE

WARNING: This page is about a different car, the 2002 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

This OSC function is used to test the transmission shift functions.

The OSC functions for the GR___CM parameter allows the technician to choose the following options:

-PCM selects 1st gear.
-PCM selects 2nd gear.
-PCM selects 3rd gear.
-PCM selects 4th gear.

OSC "GR___CM" Mode operates ONLY when:

the digital TR sensor is operational and no digital TR sensor DTCs are present.
the vehicle speed sensor is operational and no VSS sensor DTCs are present.
the engine is ON.
the TCC is OFF.
the transmission range selector lever is in O/D.
the vehicle speed is greater than 3.2 km/h (2 mph).

OSC Command Values

-PCM selects 1st gear.
-PCM selects 2nd gear.
-PCM selects 3rd gear.
-PCM selects 4th gear.
-cancels OSC value sent.
-sends the values to PCM.