Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000028KAF |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 -
] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Power Source Mode does not Change to ON (ACC); 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 - ] |
Power Source Mode does not Change to ON (ACC)
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DESCRIPTION
If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.
Related Data List and Active Test Items
Problem Symptom
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Data List and Active Test
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Power source mode does not change to on (ACC) but does change to on (IG)
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Power Source Control
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Power Supply Condition
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ACC Relay Monitor
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
(a) Using the GTS, check for certification ECU (smart key ECU assembly) DTCs.
Body Electrical > Power Source Control > Trouble Codes
Body Electrical > Smart Key > 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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Smart key system (for Start Function) DTCs are output
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B
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A
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2.
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CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER SOURCE)
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(a) Disconnect the 8J power distribution box assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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8J-1 - Body ground
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Always
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11 to 14 V
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
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3.
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CHECK POWER DISTRIBUTION BOX ASSEMBLY (ACC RELAY)
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(a) Remove the power distribution box assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
(c) Connect the auxiliary battery terminal (+) to the 8A-18 terminal.
(d) Connect the auxiliary battery terminal (-) to the 8A-8 terminal.
*a
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Component without harness connected
(Power Distribution Box Assembly)
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-
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-
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(e) 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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8J-1 - 8A-30
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Auxiliary battery voltage applied between terminals 8A-18 and 8A-8
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Below 1 Ω
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OK |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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