Toyota Corolla Cross: Check For Intermittent Problems
Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / M20a-fxs (engine Control) / Sfi System / Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS
HINT:
Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the GTS when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.
- Clear the DTCs.
- Change the ECM from normal mode to check mode using the GTS.
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- Perform a simulation test.
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- Check and wiggle the harness(es), connector(s) and terminal(s).
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Basic Inspection
CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by
Registration
REGISTRATION CAUTION / NOTICE / HINT PROCEDURE
1. VIN (VEHICLE IDENTIFICATION NUMBER) NOTICE: The Vehicle Identification Number (VIN) must be written to a replacement ECM.
HINT: The VIN is a 17-di
Initialization
INITIALIZATION Inspection After Repair Perform Learning Value Reset and Idle Learning after replacing or servicing parts related to engine operation. Details on procedures required are indicated by an
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Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA HINT:
The motor generator control ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored. It can be used for estimating or duplicating the vehicle conditions that were present when the malfunction occurred.
(a)
Main Body ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Main Body ECU Communication Stop Mode
Communication stop for "Main Body" is indicated on the "Communication
Bus Check" screen of the GTS.
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