Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000028KAM |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 - 03/2023] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Immobiliser System does not Operate Properly; 2023 MY Corolla Corolla Hatchback GR Corolla [11/2022 - 03/2023] |
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 engine DTC is output, first perform troubleshooting for the immobiliser function or engine DTC.
PROCEDURE
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Powertrain > Engine > 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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2.
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READ VALUE USING GTS (IMMOBILISER FUEL CUT)
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(a) Read the Data List according to the display on the GTS.
Powertrain > Engine > Data List
Tester Display
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Measurement Item
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Range
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Normal Condition
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Diagnostic Note
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Immobiliser Fuel Cut Status
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Immobiliser fuel cut status
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OFF or ON
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OFF: Fuel cut OFF
ON: Fuel cut ON
|
-
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Powertrain > Engine > Data List
Tester Display
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Immobiliser Fuel Cut Status
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Result
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Proceed to
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On the GTS screen, ON is displayed.
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A
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On the GTS screen, OFF is displayed.
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B
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A |
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GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)
for M20A-FKS: Click here
for G16E-GTS: Click here
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B
|
|
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3.
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CHECK WHETHER ENGINE STARTS
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(a) Check that the engine starts after 5 seconds of the ignition switch being turned to ON.
OK:
Engine starts normally.
NG
|
|
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4.
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CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILIZER CODE ECU) - ECM)
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(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.
(b) Disconnect the A47*1 or A139*2 ECM connector.
-
*1: for M20A-FKS
-
*2: for G16E-GTS
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for M20A-FKS:
Tester Connection
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Condition
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Specified Condition
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A47-25 (IMO) - I20-3 (EFII)
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Always
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Below 1 Ω
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A47-25 (IMO) or I20-3 (EFII) - Other terminals and body ground
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Always
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10 kΩ or higher
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A47-26 (IMI) - I20-4 (EFIO)
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Always
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Below 1 Ω
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A47-26 (IMI) or I20-4 (EFIO) - Other terminals and body ground
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Always
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10 kΩ or higher
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for G16E-GTS:
Tester Connection
|
Condition
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Specified Condition
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A139-47 (IMO) - I20-3 (EFII)
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Always
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Below 1 Ω
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A139-47 (IMO) or I20-3 (EFII) - Other terminals and body ground
|
Always
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10 kΩ or higher
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A139-61 (IMI) - I20-4 (EFIO)
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Always
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Below 1 Ω
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A139-61 (IMI) or I20-4 (EFIO) - 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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OK
|
|
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5.
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CHECK ID CODE BOX (IMMOBILIZER CODE ECU) (TERMINAL EFIO AND EFII)
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(a) Connect the A47*1 or A139*2 ECM connector.
-
*1: for M20A-FKS
-
*2: for G16E-GTS
(b) Connect the I20 ID code box (immobiliser code ECU) connector.
(c) Using an oscilloscope, check the waveform.
*a
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Component with harness connected
(ID Code Box (Immobiliser Code 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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Waveform (EFII)
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*g
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Waveform (EFIO)
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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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-
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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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I20-3 (EFII) - Body ground
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Within 3 seconds of engine 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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I20-4 (EFIO) - Body ground
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Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after auxiliary battery cable disconnected and reconnected
|
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
|
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 or is not output, or has abnormal wavelength or shape
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C
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C |
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REPLACE ECM
for M20A-FKS: Click here
for G16E-GTS: Click here
|
A
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|
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6.
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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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7.
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CHECK WHETHER ENGINE STARTS
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(a) Check that the engine starts.
OK:
Engine starts normally.
OK |
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END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)
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