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DTC P178A-14: Gear Shift Control Module "B" Wake-up Circuit Short to Ground or Open [12/2022 - ]: Description

The shift actuator ECU starts when it receives a WAKE signal from the shift control ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate DTC Output from Priority Note
P178A-14 Gear Shift Control Module "B" Wake-up Circuit Short to Ground or Open When the auxiliary battery voltage and BAT1 terminal voltage are a certain value or more, a low WAKE terminal voltage is continuously detected
(1 trip detection logic)
  • Shift actuator ECU (shift control actuator assembly)
  • Shift control ECU (transmission floor shift assembly)
  • Wire harness or connector
Does not come on Multi-information Display Error Message 
  • Displayed
Hybrid Control A SAE: P178B