DTC P0816: Short in Transmission Gear Selection Switch Downshift Switch Circuit, or Transmission Gear Selection Switch Downshift Switch Stuck ON: General Description

When the shift lever is moved to the M position (the sequential sportshift mode (S-MODE) is selected), the upshift (S-UP) switch and the downshift (S-DN) switch can be used. When the shift lever is moved toward the S-UP switch, an upshift is executed, and when the shift lever is moved toward the S-DN switch, a downshift is executed. The S-MODE switch signal, the S-UP switch signal, and the S-DN switch signal are grounded when turned on and opened when turned off.

When the S-DN switch is turned on in the P, R, N, and D3 positions, a malfunction of the S-DN switch is detected and a DTC is stored.