| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H8E6 |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 04/2020] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Immobiliser System does not Operate Properly; 2020 MY Corolla Corolla HV [01/2019 - 04/2020] | ||
|
Immobiliser System does not Operate Properly |
DESCRIPTION
The immobiliser function compares the ID code that is registered in the certification ECU (smart key ECU assembly) with the ID code of the transponder chip that is embedded in the electrical key transmitter sub-assembly.
WIRING DIAGRAM
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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): B279986; Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid](/t3Portal/stylegraphics/info.gif)
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.
-
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.
Click here
-
Before replacing the hybrid vehicle control ECU or certification ECU (smart key ECU assembly), refer to Registration.
Click here
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
- Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.
HINT:
If an immobiliser function or hybrid control system DTC is output, first perform troubleshooting for the immobiliser function or hybrid control system DTC.
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
2. |
CHECK WHETHER HYBRID CONTROL SYSTEM STARTS |
(a) Check that the hybrid control system starts within 5 seconds of the power switch being turned on (READY).
OK:
Hybrid control system starts normally.
| OK |
|
|
|
3. |
CHECK HYBRID VEHICLE CONTROL ECU (TERMINAL IMI AND IMO) |
(a) Using an oscilloscope, check the waveform.
|
*a |
Component with harness connected (Hybrid Vehicle Control ECU) |
*b |
Approximately 160 ms. |
|
*c |
Approximately 270 ms. |
*d |
Approximately 40 ms. |
|
*e |
Approximately 60 ms. |
*f |
Waveform 1 |
|
*g |
Waveform 2 |
*h |
Waveform 3 |
|
*i |
Waveform 1 (detail) |
- |
- |
NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
OK:
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
I3-23 (IMO) - Body ground |
Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform 2) |
|
I3-10 (IMI) - Body ground |
Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform 1 and 3) |
|
Result |
Proceed to |
|---|---|
|
Normal waveform |
A |
|
Waveform 1 is not output, or has abnormal wavelength or shape |
B |
|
Waveform 2 is not output, or has abnormal wavelength or shape |
C |
|
Waveform 3 is not output, or has abnormal wavelength or shape |
D |
| B |
|
| C |
|
| D |
|
|
|
4. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID codes.
Click here
|
|
5. |
CHECK WHETHER HYBRID CONTROL SYSTEM STARTS |
(a) Check that the hybrid control system starts.
OK:
Hybrid control system starts normally.
| OK |
|
END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) |
| NG |
|
|
6. |
CHECK HARNESS AND CONNECTOR (ID CODE BOX (IMMOBILISER CODE ECU) - HYBRID VEHICLE CONTROL ECU) |
(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.
(b) Disconnect the I3 hybrid vehicle control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I20-3 (EFII) - I3-23 (IMO) |
Always |
Below 1 Ω |
|
I20-3 (EFII) or I3-23 (IMO) - Other terminals and body ground |
Always |
10 kΩ or higher |
|
I20-4 (EFIO) - I3-10 (IMI) |
Always |
Below 1 Ω |
|
I20-4 (EFIO) or I3-10 (IMI) - Other terminals and body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
REPLACE ID CODE BOX (IMMOBILISER CODE ECU) |
(a) Replace the ID code box (immobiliser code ECU) with a new one.
Click here
|
|
8. |
REGISTER RECOGNITION CODE |
(a) Register the recognition codes to the ECUs.
Click here
|
|
9. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID codes.
Click here
|
|
10. |
CHECK WHETHER HYBRID CONTROL SYSTEM STARTS |
(a) Check that the hybrid control system starts.
OK:
Hybrid control system starts normally.
| OK |
|
END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) |
| NG |
|
|
|