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DTC P1603-00: Engine Stall History [12/2019 - 10/2022]: Description

If the engine stalls or fails to start while stop and start control is operating, DTC P1603-00 will be stored. Using the GTS, the Freeze Frame Data recorded the moment the DTC is stored can be read. Serviceability has been enhanced by enabling the cause of an engine stall or engine start failure which occurred while stop and start control was operating to be checked using the Freeze Frame Data.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P1603-00 Engine Stall History Both of the following conditions are met for 0.5 seconds or more (1 trip detection logic):
  • Engine stopped by stop and start control and engine hood opened*1
  • engine hood courtesy switch (hood lock assembly): Engine hood opened and mode changed to "stalled"*2

Both of the following conditions are met for 0.5 seconds or more (1 trip detection logic):

  • Engine stopped by stop and start control and collision or low battery voltage detected.
  • Collision detection signal received from the airbag sensor assembly and mode changed to "stalled"*2.

Both of the following conditions are met for 0.5 seconds or more (1 trip detection logic):

  • Engine being restarted by stop and start control and collision detected.
  • Collision detection signal received from the airbag sensor assembly and mode changed to "stalled"*2.

Both of the following conditions are met for 0.5 seconds or more (1 trip detection logic):

  • Engine being restarted by stop and start control and restart fails.
  • Using the NE signal, complete combustion is identified 0.6 seconds after the engine stop judgment*3 was made or complete combustion does not occur even after the starter assembly has operated for a certain amount of time (NE signal is normal).

Both of the following conditions are met for 0.5 seconds or more (1 trip detection logic):

  • Engine being restarted by stop and start control and restart fails.
  • Engine speed signal from the ECM not received via CAN communication (NE signal is abnormal*4).

Detection Conditions: Always
Sensors/components used for detection: park/neutral position switch assembly, airbag sensor assembly, battery, crankshaft position sensor, STA signal circuit, ECM
  • Wire harness or connector
  • CAN communication system
  • Engine hood courtesy switch (Hood lock assembly)
  • Airbag system
  • SFI system
  • Starter assembly
  • Engine stop and start ECU
 Does not come on DTC stored SAE Code: P1603

*1: Only when the shift lever is in D

*2: The mode "stalled" represents a state in which engine restart is prohibited/canceled due to a collision being detected or the engine hood being opened and restart is not preferable. In this situation, "IG" is displayed for the Data List item [Stop&Start of Eng State]. If the mode changes to "IG", engine start by stop and start control is prohibited and the engine can only be started by operating the push start switch assembly.

*3: Engine stop judgment is performed to judge whether the engine is stopped completely. The engine stop and start ECU judges that the engine is stopped when it does not receive an engine speed signal (NE signal) from the ECM for 0.6 seconds or more.

*4: The engine stop and start ECU stores DTC P0335-62.

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