| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H8E5 |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Security Indicator Light Does not Blink; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
Security Indicator Light Does not Blink |
DESCRIPTION
- The certification ECU (smart key ECU assembly) blinks the security indicator light (combination meter assembly) when the immobiliser is set (power switch off).
- 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 (combination meter assembly).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus Body Electrical Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
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The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
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![2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
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Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to Registration.
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PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
OK:
DTCs are not output.
| NG |
|
GO TO DIAGNOSTIC TROUBLE CODE CHART
|
|
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (IMMOBILISER INDICATOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Smart Key > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Immobiliser Indicator |
Security indicator light |
OFF/ON |
- |
Body Electrical > Smart Key > Active Test
|
Tester Display |
|---|
|
Immobiliser Indicator |
OK:
The security indicator light operates normally.
| NG |
|
|
|
3. |
CHECK SECURITY INDICATOR LIGHT OPERATION |
(a) When the immobiliser is set, check that the security indicator light blinks.*1
OK:
The security indicator light blinks normally.
(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light illuminates.*2
OK:
The security indicator light illuminates normally.
|
Result |
Proceed to |
|---|---|
|
*1 is NG (*2 is OK) |
A |
|
*2 is NG (*1 is OK) |
B |
| A |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
| B |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
|
4. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY) AND BODY GROUND) |
(a) Disconnect the I1 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I4 and I5 security indicator light (combination meter assembly) connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I1-19 (IND) - I5-7 (LP) |
Always |
Below 1 Ω |
|
I1-19 (IND) or I5-7 (LP) - Other terminals and body ground |
Always |
10 kΩ or higher |
|
I4-23 (ES) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Connect the I1 certification ECU (smart key ECU assembly) connector.
(b) Connect the I4 and I5 security indicator light (combination meter assembly) connectors.
(c) Using an oscilloscope, check the waveform.
|
*a |
Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
- |
- |
Measurement Condition:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I1-19 (IND) - Body ground |
Power switch off → on (IG) |
Pulse generation → Below 2 V |
| OK |
|
REPLACE SECURITY INDICATOR LIGHT (COMBINATION METER ASSEMBLY)
|
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
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