DTC Advanced Diagnostics: P2685, P2686: General Description

Courtesy of HONDA, U.S.A., INC.

The actuator supply voltage is for the power to drive the CPU in the transmission control module (TCM). From the perspective of a fail-safe, three systems (VB1, VB2, and VB3) of the power supply lines are secured. They also have a role to supply power to the clutch pressure control solenoid valves and the shift solenoid valves. The TCM monitors whether the VB3 voltage is in a normal range by the CPU. If the VB3 voltage is a specified value for a set time, the TCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type 

*: DTC P2685

**: DTC P2686