Toyota Corolla Cross: 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 (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 (combination meter 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 the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. 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 > Engine > 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 (combination meter assembly) operates normally.
| NG | | GO TO STEP 4 |
|
| 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 (combination meter assembly) 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 (combination meter 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 (COMBINATION METER 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 (COMBINATION METER ASSEMBLY) |
| NG | | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
READ NEXT:
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 electric
Precaution
PRECAUTION CAUTION REGARDING INTERFERENCE WITH ELECTRONIC DEVICES
CAUTION: As weak radio waves are emitted from the electrical key transmitter sub-assembly, if a pacemaker is being used, be sure to
SEE MORE:
Replacement
REPLACEMENT
CAUTION / NOTICE / HINT
CAUTION:
To avoid the danger of being burned, do not remove the reserve tank cap or drain
cock plug while the coolant (for inverter) is still hot. Pressurized, hot coolant
(for inverter) and steam may be released and cause serious burns.
*1
Safety Connect LED light
Indicators
When the engine switch is
turned to ON, the red indicator
light comes on for 2 seconds
then turns off. Afterward, the
green indicator light comes on,
indicating that the service is
active.
The following indicator light patterns
indicate specific system
usage conditions:
Green indicator light on =
