Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026XCX |
Model Year Start: 2023 |
Model: Corolla |
Prod Date Range: [09/2022 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Security Indicator Light Does not Blink; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] |
Security Indicator Light Does not Blink
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DESCRIPTION
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The certification ECU (smart key ECU assembly) blinks the security indicator light (air conditioning control assembly) when the immobiliser is set (ignition switch off).
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The certification ECU (smart key ECU assembly) receives the security indicator light signal from the main body ECU (multiplex network body ECU) via CAN communication when the theft deterrent system is in the arming preparation state or alarm sounding state. Then, the certification ECU (smart key ECU assembly) blinks the security indicator light (air conditioning control assembly).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
OK:
DTCs are not output.
OK
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2.
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PERFORM ACTIVE TEST USING GTS (IMMOBILISER INDICATOR)
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(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Smart Key > Active Test
Tester Display
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Measurement Item
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Control Range
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Diagnostic Note
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Immobiliser Indicator
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Security indicator light
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OFF/ON
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-
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Body Electrical > Smart Key > Active Test
Tester Display
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Immobiliser Indicator
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OK:
The security indicator light (air conditioning control assembly) operates normally.
OK
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3.
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CHECK SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) OPERATION
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(a) When the immobiliser is set, check that the security indicator light (air conditioning control assembly) blinks.*1
OK:
The security indicator light (air conditioning control assembly) blinks normally.
(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light (air conditioning control assembly) illuminates.*2
OK:
The security indicator light (air conditioning control assembly) illuminates normally.
Result
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Proceed to
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*1 is NG (*2 is OK)
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A
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*2 is NG (*1 is OK)
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B
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4.
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CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY))
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(a) Disconnect the I167 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I37 security indicator light (air conditioning control assembly) 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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I167-25 (IND) - I37-10 (LP)
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Always
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Below 1 Ω
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I167-25 (IND) or I37-10 (LP) - Other terminals and body ground
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Always
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10 kΩ or higher
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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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
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(a) Connect the I167 certification ECU (smart key ECU assembly) connector.
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*a
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Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
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(b) Connect the I37 security indicator light (air conditioning control assembly) connector.
(c) Using an oscilloscope, check the waveform.
Measurement Condition:
Tester Connection
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Condition
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Specified Condition
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I167-25 (IND) - Body ground
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Ignition switch off → ON
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Pulse generation → Below 2 V
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OK |
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REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY)
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