Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CY5S |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 09/2022] |
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Power Source Mode does not Change to ON (IG); 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] |
Power Source Mode does not Change to ON (IG)
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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 (IG) but does change to on (ACC)
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Power Source Control
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Power Supply Condition
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IG Relay Monitor (Inside)
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IG Relay Monitor (Outside)
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IG Circuit
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
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If interior verification is unsuccessful, Operation History may be stored.
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If Operation History has been stored, refer to the Operation History List to determine the detection conditions and narrow down trouble areas.
Body Electrical > Smart Key > Utility
Tester Display
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Operation History
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PROCEDURE
1.
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CHECK POWER SOURCE MODE
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(a) Get into the vehicle while carrying the electrical key transmitter sub-assembly that has already been registered.
(b) Move the shift lever to P.*1
(c) Press the engine switch with the brake pedal released and check that the power source mode changes.*1
Click here
(d) Press the engine switch with the clutch pedal released and check that the power source mode changes.*2
Click here
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*1: except Manual Transaxle
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*2: for Manual Transaxle
Result
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Proceed to
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Power source mode cannot be changed
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A
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Power source mode can be changed
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B
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B |
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CHECK OPERATION HISTORY
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A
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|
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(a) Using the Techstream, check for certification ECU (smart key ECU assembly) DTCs.
Body Electrical > Power Source Control > Trouble Codes
Body Electrical > Smart Key > Trouble Codes
Body Electrical > Starting 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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Smart key system (for Start Function) DTCs are output
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B
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A
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|
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3.
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CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
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(a) 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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I1-15 (IG1D) - Body ground
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Engine switch on (ACC) → Engine switch on (IG)
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1 V or less → 9 V or higher
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|
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*a
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Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
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|
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OK
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|
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4.
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CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
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(a) Disconnect the I1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the 4C, 4D, 4E and 4F instrument panel junction block assembly connectors.
(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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I1-15 (IG1D) - 4E-17
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Always
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Below 1 Ω
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4F-3 - Body ground
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Always
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Below 1 Ω
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I1-15 (IG1D) or 4E-17 - Other terminals and body ground
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Always
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10 kΩ or higher
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(d) 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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4D-1 - Body ground
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Always
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11 to 14 V
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4C-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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|
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5.
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CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1-NO. 1, IG1-NO. 2, IG2-NO. 2 RELAY)
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(a) Remove the instrument panel junction block assembly.
Click here
(b) Connect all of the instrument panel junction block assembly connectors.
(c) Connect the I1 certification ECU (smart key ECU assembly) connector.
(d) Measure the voltage according to the value(s) in the table below.
*a
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Component with harness connected
(Instrument Panel Junction Block Assembly)
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-
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-
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Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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4B-14 - Body ground
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Engine switch on (IG)
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11 to 14 V
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4B-2 - Body ground
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Engine switch on (IG)
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11 to 14 V
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4B-15 - Body ground
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Engine switch on (IG)
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11 to 14 V
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4B-13 - Body ground
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Engine switch on (IG)
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11 to 14 V
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OK
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6.
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INSPECT NO.1 INTEGRATION RELAY
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(a) Remove the No. 1 integration relay.
Click here
(b) Inspect the No. 1 integration relay.
Click here
OK
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|
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7.
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CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - NO.1 INTEGRATION RELAY)
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(a) Disconnect the 1A No. 1 integration relay connector.
(b) Disconnect the 4B instrument panel junction block 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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4B-13 - 1A-7
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Always
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Below 1 Ω
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1A-8 - Body ground
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Always
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Below 1 Ω
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4B-13 or 1A-7 - 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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