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DTC C1A05: Stop Light Switch Circuit [09/2014 - 11/2017]: Description

When the brake pedal is depressed, the stop light switch assembly sends a brake pedal operation signal to the driving support ECU assembly. After receiving this signal, the driving support ECU cancels the dynamic radar cruise control system. When the driving support ECU assembly detects a problem in the stop light switch assembly circuit, DTC C1A05 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1A05 Stop Light Switch Circuit When the engine switch is on (IG) and the cruise control switch is on, the driving support ECU assembly detects a malfunction in the signal from the stop light switch assembly circuit for 2 seconds or more.
  • Stop light switch assembly
  • Harness or connector
  • Driving support ECU assembly