GR__CM In DRIVE MODE

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.