FixVault

DTC P0885 A/T Relay Circuit Malfunction: DTC Detecting Condition

DTC DETECTING CONDITION

Item Detecting Condition Possible cause
DTC Strategy 
  • Check voltage range
  • Open or short in circuit
  • Faulty A/T control relay
  • Faulty PCM/TCM
Enable Conditions
  • 22V > Ignition key input voltage > 9V
  • Time after TCM turns on > 0.5sec
Threshold value 
  • Voltage < 7V or Voltage > 24.5V
Diagnostic Time 
  • 0.1 sec
Fail Safe 
  • Locked in 3rd gear. (Control relay off)