Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026XCY |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Immobiliser System does not Operate Properly; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
Immobiliser System does not Operate Properly
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DESCRIPTION
The immobiliser function compares the ID code that is registered in the certification ECU (smart key ECU assembly) with the ID code of the transponder chip that is embedded in the electrical key transmitter sub-assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
If an immobiliser function or hybrid control system DTC is output, first perform troubleshooting for the immobiliser function or hybrid control system DTC.
PROCEDURE
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
Result
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Proceed to
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DTCs are not output
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A
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DTCs are output
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B
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A
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|
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2.
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CHECK WHETHER HYBRID CONTROL SYSTEM STARTS
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(a) Check that the hybrid control system starts within 5 seconds of the ignition switch being turned ON (READY).
OK:
Hybrid control system starts normally.
NG
|
|
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3.
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CHECK HYBRID VEHICLE CONTROL ECU (TERMINAL IMI AND IMO)
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(a) Using an oscilloscope, check the waveform.
*a
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Component with harness connected
(Hybrid Vehicle Control ECU)
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*b
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Approximately 160 ms.
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*c
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Approximately 270 ms.
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*d
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Approximately 40 ms.
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*e
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Approximately 60 ms.
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*f
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Terminal IMO
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*g
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Terminal IMI
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*h
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Waveform 1
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*i
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Waveform 2
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*j
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Waveform 3
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*k
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Waveform 1 (detail)
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-
|
-
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NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
OK:
Tester Connection
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Condition
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Tool Setting
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Specified Condition
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I3-39 (IMO) - Body ground
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Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after auxiliary battery cable disconnected and reconnected
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2 V/DIV., 500 ms./DIV.
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Pulse generation
(See waveform 2)
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I3-53 (IMI) - Body ground
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Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after auxiliary battery cable disconnected and reconnected
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2 V/DIV., 500 ms./DIV.
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Pulse generation
(See waveform 1 and 3)
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Result
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Proceed to
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Normal waveform
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A
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Waveform 1 is not output, or has abnormal wavelength or shape
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B
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Waveform 2 is not output, or has abnormal wavelength or shape
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C
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Waveform 3 is not output, or has abnormal wavelength or shape
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D
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A
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|
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4.
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REGISTER ECU COMMUNICATION ID
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(a) Register the ECU communication ID codes.
Click here
NEXT
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|
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5.
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CHECK WHETHER HYBRID CONTROL SYSTEM STARTS
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(a) Check that the hybrid control system starts.
OK:
Hybrid control system starts normally.
OK |
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END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)
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6.
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CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU)
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(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.
(b) Disconnect the I3 hybrid vehicle control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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I20-3 (EFII) - I3-39 (IMO)
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Always
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Below 1 Ω
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I20-3 (EFII) or I3-39 (IMO) - Other terminals and body ground
|
Always
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10 kΩ or higher
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I20-4 (EFIO) - I3-53 (IMI)
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Always
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Below 1 Ω
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I20-4 (EFIO) or I3-53 (IMI) - Other terminals and body ground
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Always
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10 kΩ or higher
|
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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7.
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REPLACE ID CODE BOX (IMMOBILISER CODE ECU)
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(a) Replace the ID code box (immobiliser code ECU) with a new one.
Click here
NEXT
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|
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8.
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REGISTER RECOGNITION CODE
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(a) Register the recognition codes to the ECUs.
Click here
NEXT
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9.
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REGISTER ECU COMMUNICATION ID
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(a) Register the ECU communication ID codes.
Click here
NEXT
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|
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10.
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CHECK WHETHER HYBRID CONTROL SYSTEM STARTS
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(a) Check that the hybrid control system starts.
OK:
Hybrid control system starts normally.
OK |
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END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE)
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