Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GV84
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): Security Indicator Light Does not Blink; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]

Security Indicator Light Does not Blink

DESCRIPTION

  • The transponder key ECU assembly blinks the security indicator light (combination meter assembly) when the immobiliser is set (no key is in the ignition key cylinder).
  • The main body ECU (multiplex network body ECU) blinks the security indicator light (combination meter assembly) when the theft deterrent system is in the arming preparation state or alarm sounding state.*
  • *: w/ Theft Deterrent System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the transponder key ECU assembly is replaced, refer to Registration.

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PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY INDICATOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Immobiliser or Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Immobiliser > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Security Indicator

Security indicator light (combination meter assembly)

ON/OFF

-

Body Electrical > Immobiliser > Active Test

Tester Display

Security Indicator

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Security Indicator

Security indicator light (combination meter assembly)

ON/OFF

w/ Theft Deterrent System

Body Electrical > Main Body > Active Test

Tester Display

Security Indicator

Result

Proceed to

Security indicator light (combination meter assembly) operation is normal when performing the "Main Body" and "Immobiliser" Active Test

A

  • Security indicator light (combination meter assembly) operation is not normal when performing the "Immobiliser" Active Test
  • Security indicator light (combination meter assembly) operation is normal when performing the "Main Body" Active Test

B

  • Security indicator light (combination meter assembly) operation is normal when performing the "Immobiliser" Active Test
  • Security indicator light (combination meter assembly) operation is not normal when performing the "Main Body" Active Test

C

Security indicator light (combination meter assembly) operation is not normal when performing the "Main Body" and "Immobiliser" Active Test

D

B

GO TO STEP 3

C

GO TO STEP 4

D

GO TO STEP 5

A

2.

CHECK SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) OPERATION

(a) When the immobiliser is set, check that the security indicator light (combination meter assembly) blinks.*1

OK:

The security indicator light (combination meter assembly) blinks normally.

(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light (combination meter assembly) is on.*2

Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM (for HV Model): SYSTEM DESCRIPTION

OK:

The security indicator light (combination meter assembly) is on.

Result

Proceed to

Both *1 and *2 are OK

A

*1 is NG (*2 is OK)

B

*2 is NG (*1 is OK)

C

Both *1 and *2 are NG

D

A

USE SIMULATION METHOD TO CHECK

B

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C

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

D

REPLACE SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

3.

CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) - TRANSPONDER KEY ECU ASSEMBLY)

(a) Disconnect the I5 security indicator light (combination meter assembly) connector.

(b) Disconnect the I67 transponder key ECU assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I67-8 (IND) - I5-7 (LP)

Always

Below 1 Ω

I67-8 (IND) or I5-7 (LP) - Other terminals and body ground

Always

10 kΩ or higher

OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I5 security indicator light (combination meter assembly) connector.

(b) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I85-7 (IND) - I5-7 (LP)

Always

Below 1 Ω

I85-7 (IND) or I5-7 (LP) - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I5 security indicator light (combination meter assembly) connector.

(b) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I85-7 (IND) - I5-7 (LP)

Always

Below 1 Ω

I85-7 (IND) or I5-7 (LP) - Other terminals and body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) - BODY GROUND)

(a) Disconnect the I4 security indicator light (combination meter assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I4-23 (ES) - Body ground

Always

Below 1 Ω

OK

REPLACE SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR