Caution / Notice / Hint

HINT:

DTC P1605-00
- In contrast to conventional DTCs for components, circuits and systems, DTC P1605-00 is used to estimate the malfunctioning area from problem symptoms and Freeze Frame Data in response to symptoms such as "rough idling", "strong engine vibrations", etc.
  Such problem symptoms can occur even in the following conditions:
  - Driving with long-stored fuel (fuel that has remained in the tank for long periods of time)
  - Using fuel not acclimated to the climate during a change of seasons
  - Temporarily using low-quality fuel (fuel that contains water or has poor fuel properties)
- As DTCs may be stored when an Active Test or learning is performed, make sure to clear the DTCs before returning the vehicle to the customer.
- If any other DTCs are output, perform troubleshooting for those DTCs first.
FREEZE FRAME DATA
- Read Freeze Frame Data using the GTS. Freeze Frame Data records engine conditions when a malfunction occurs. This information can be useful when troubleshooting.
- When confirming the Freeze Frame Data, be sure to check all multi Freeze Frame Data.
  Refer to FREEZE FRAME DATA [12/2019 - 09/2020] , or refer to FREEZE FRAME DATA [09/2020 - 10/2022]
- When confirming the Freeze Frame Data, if there are multiple items related to the cause of the malfunction, perform troubleshooting for all related items.
- Try to operate the vehicle under the conditions recorded in the Freeze Frame Data which were present when the malfunction occurred. Confirm the data at this time and the data when the engine is idling (engine warmed up, no load, and shift lever in D or N) and compare this data with the Freeze Frame Data.
PRECAUTIONS
- Inspections take into account the fact that the malfunction may not have recurred and place emphasis on checking the vehicle conditions present at the time when the malfunction occurred.
- When performing inspections, jiggle the relevant wire harnesses and connectors in an attempt to reproduce malfunctions that do not always occur.