| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000015GTB |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [06/2017 - 08/2022] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): Immobiliser System does not Operate Properly; 2018 - 2022 MY Camry [06/2017 - 08/2022] | ||
|
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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![2018 - 2022 MY Camry [06/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): 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 engine 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. 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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-
Before replacing the ECM or certification ECU (smart key ECU assembly), refer to Registration.
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- 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 the Diagnostic Trouble Code Chart.
HINT:
If an immobiliser function or SFI system DTC is output, first perform troubleshooting for the immobiliser function or SFI system DTC.
PROCEDURE
|
1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes
Powertrain > Engine > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
GO TO DIAGNOSTIC TROUBLE CODE CHART
|
|
|
2. |
READ VALUE USING TECHSTREAM (IMMOBILISER FUEL CUT STATUS) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List.
(e) Read the Data List according to the display on the Techstream.
Powertrain > Engine > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Immobiliser Fuel Cut Status |
Status of immobiliser fuel cut |
OFF or ON |
- |
- |
Powertrain > Engine > Data List
|
Tester Display |
|---|
|
Immobiliser Fuel Cut Status |
OK:
OFF is displayed after the engine is started.
| OK |
|
GO TO SFI SYSTEM for A25A-FKS: Click here
for 2GR-FKS: Click here
|
|
|
3. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts 5 seconds after the engine switch turned on (IG).
OK:
Engine starts normally.
| OK |
|
USE SIMULATION METHOD TO CHECK
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM) |
(a) Disconnect the A13 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the A24*1 or A21*2 ECM connector.
- *1: for A25A-FKS
- *2: for 2GR-FKS
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for A25A-FKS
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A13-3 (EFII) - A24-25 (IMO) |
Always |
Below 1 Ω |
|
A13-4 (EFIO) - A24-26 (IMI) |
Always |
Below 1 Ω |
|
A13-3 (EFII) or A24-25 (IMO) - Other terminals and body ground |
Always |
10 kΩ or higher |
|
A13-4 (EFIO) or A24-26 (IMI) - Other terminals and body ground |
Always |
10 kΩ or higher |
for 2GR-FKS
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A13-3 (EFII) - A21-45 (IMO) |
Always |
Below 1 Ω |
|
A13-4 (EFIO) - A21-59 (IMI) |
Always |
Below 1 Ω |
|
A13-3 (EFII) or A21-45 (IMO) - Other terminals and body ground |
Always |
10 kΩ or higher |
|
A13-4 (EFIO) or A21-59 (IMI) - Other terminals and body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK ECM (TERMINAL EFIO AND EFII) |
(a) Connect the A13 certification ECU (smart key ECU assembly) connector.
(b) Connect the A24*1 or A21*2 ECM connector.
- *1: for A25A-FKS
- *2: for 2GR-FKS
(c) Using an oscilloscope, check the waveform.
|
*a |
Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
*b |
Approximately 160 ms |
|
*c |
Approximately 270 ms |
*d |
Approximately 40 ms |
|
*e |
Approximately 60 ms |
*f |
Waveform (EFII) |
|
*g |
Waveform (EFIO) |
*h |
Waveform A |
|
*i |
Waveform B |
*j |
Waveform C |
|
*k |
Waveform A (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 |
|---|---|---|---|
|
A13-3 (EFII) - Body ground |
Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform (EFII)) |
|
A13-4 (EFIO) - Body ground |
Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected |
2 V/DIV., 500 ms./DIV. |
Pulse generation (See waveform (EFIO)) |
|
Result |
Proceed to |
|---|---|
|
Normal waveform |
A |
|
Waveform A or C not output, or has abnormal wavelength or shape |
B |
|
Waveform B not output, or has abnormal wavelength or shape |
C |
| B |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
| C |
|
REPLACE ECM for A25A-FKS: Click here
for 2GR-FKS: Click here
|
|
|
6. |
REGISTER ECU COMMUNICATION ID |
(a) Register the ECU communication ID.
HINT:
Refer to Registration.
Click here
|
|
7. |
CHECK WHETHER ENGINE STARTS |
(a) Check that the engine starts.
OK:
Engine starts normally.
| OK |
|
END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) |
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
|