Toyota Corolla Cross: Security Indicator Light Does not Blink
DESCRIPTION
- The certification ECU (smart key ECU assembly) blinks the security indicator light (air conditioning control assembly) when the immobiliser is set (ignition 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 (air conditioning control assembly).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.
Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS 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.
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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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- Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.
- After completing repairs, confirm that the problem does not recur.
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. | CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Smart Key > Trouble Codes Powertrain > Hybrid Control > Trouble CodesOK:
DTCs are not output.
| NG | .gif) |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
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| 2. |
PERFORM ACTIVE TEST USING GTS (IMMOBILISER INDICATOR) |
(a) Perform the Active Test according to the display on the GTS.
Body Electrical > Smart Key > Active Test|
Tester Display | Measurement Item |
Control Range | Diagnostic Note |
|---|---|---|---|
|
Immobiliser Indicator | Security indicator light |
OFF/ON | - |
|
Tester Display |
|---|
| Immobiliser Indicator |
OK:
The security indicator light (air conditioning control assembly) operates normally.
| NG | | GO TO STEP 4 |
|
| 3. |
CHECK SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) OPERATION |
(a) When the immobiliser is set, check that the security indicator light (air conditioning control assembly) blinks.*1
OK:
The security indicator light (air conditioning control assembly) blinks normally.
(b) When the theft deterrent system is in the arming preparation state, check that the security indicator light (air conditioning control assembly) illuminates.*2
OK:
The security indicator light (air conditioning control assembly) 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 (AIR CONDITIONING CONTROL ASSEMBLY)) |
(a) Disconnect the I222 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the I37 security indicator light (air conditioning control assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I222-25 (IND) - I37-10 (LP) |
Always | Below 1 Ω |
|
I222-25 (IND) or I37-10 (LP) - Other terminals and body ground |
Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| (a) Connect the I222 certification ECU (smart key ECU assembly) connector. |
|
(b) Connect the I37 security indicator light (air conditioning control assembly) connector.
(c) Using an oscilloscope, check the waveform.
Measurement Condition:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I222-25 (IND) - Body ground |
Ignition switch off → ON |
Pulse generation → Below 2 V |
| OK | | REPLACE SECURITY INDICATOR LIGHT (AIR CONDITIONING CONTROL ASSEMBLY) |
| NG | | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
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