DESCRIPTION
If the key ID codes of the door control transmitter assembly and transponder key ECU assembly match, the engine immobiliser system is unset and the engine start permission signal is sent to the ECM. When the ID codes of the transponder key ECU assembly and ECM match, the engine starts.
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
If the transponder key ECU assembly or ECM is replaced, refer to Service Bulletin.
PROCEDURE
CLEAR DTC
Clear the DTCs Click here.
NEXT |
CHECK FOR DTC
Check for DTCs Click here.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
GO TO DIAGNOSTIC TROUBLE CODE CHART Click here |
A |
READ VALUE USING INTELLIGENT TESTER (IMMOBILISER FUEL CUT)
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Enter the following menus: Powertrain / Engine and ECT / Data List.
Read the Data List according to the display on the intelligent tester.
Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
---|---|---|---|
Immobiliser Fuel Cut | Status of immobiliser fuel cut / ON or OFF | - | - |
OK |
---|
OFF is displayed after the ignition switch to ON. |
Result | ||||||
---|---|---|---|---|---|---|
|
B |
GO TO SFI SYSTEM Click here |
A |
CHECK WHETHER ENGINE STARTS
Using a registered door control transmitter assembly, turn the ignition switch to ON.
Check that the engine starts 5 seconds after the ignition switch was turned to ON.
OK |
---|
Engine starts normally. |
Result | ||||||
---|---|---|---|---|---|---|
|
B |
USE SIMULATION METHOD TO CHECK Click here |
A |
CHECK ECM (TERMINAL IMI)
Using an oscilloscope, check the waveform.
*a | Component with harness connected (ECM) |
*b | Component with harness connected (Transponder Key ECU Assembly) |
*c | Waveform 1 | *d | Waveform 2 |
*e | Approximately 160 ms | *f | Approximately 270 ms |
Measurement Condition | ||||||||
---|---|---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
CHECK HARNESS AND CONNECTOR ((TRANSPONDER KEY ECU ASSEMBLY - ECM) Click here |
C |
REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here |
A |
CHECK ECM (TERMINAL IMO)
Using an oscilloscope, check the waveform.
*a | Component with harness connected (ECM) |
*b | Component with harness connected (Transponder Key ECU Assembly) |
*c | Waveform | *d | Approximately 160 ms |
*e | Approximately 270 ms | - | - |
Measurement Condition | ||||||||
---|---|---|---|---|---|---|---|---|
|
Result | ||||||
---|---|---|---|---|---|---|
|
B |
REPLACE ECM Click here |
A |
REGISTER ECU COMMUNICATION ID
Register the communication ID between the transponder key ECU assembly and ECM.
Tech Tips
Refer to Service Bulletin.
NEXT |
CHECK WHETHER ENGINE STARTS
Using a registered door control transmitter assembly, turn the ignition switch to ON.
Check that the engine starts 5 seconds after the ignition switch was turned to ON.
OK |
---|
Engine starts normally. |
NG |
REPLACE TRANSPONDER KEY ECU ASSEMBLY Click here |
OK |
END (REGISTERED COMMUNICATION ID WAS DEFECTIVE)
REPLACE ECM
Temporarily replace the ECM with a new one Click here.
NEXT |
REGISTER ECU COMMUNICATION ID
Register the ECU communication ID.
Tech Tips
Refer to Service Bulletin.
NEXT |
CHECK WHETHER ENGINE STARTS
Using a registered door control transmitter assembly, turn the ignition switch to ON.
Check that the engine starts 5 seconds after the ignition switch was turned to ON.
OK |
---|
Engine starts normally. |
NG |
GO TO SFI SYSTEM Click here |
OK |
END (ECM WAS DEFECTIVE)
CHECK HARNESS AND CONNECTOR ((TRANSPONDER KEY ECU ASSEMBLY - ECM)
Disconnect the I19 transponder key ECU assembly connector.
Disconnect the A25 ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE TRANSPONDER KEY ECU ASSEMBLY
Replace the transponder key ECU assembly with a new one.
Tech Tips
Refer to Service Bulletin.
Note
Key ID code registration is necessary when replacing the transponder key ECU assembly, refer to Service Bulletin.
NEXT |
CHECK WHETHER ENGINE STARTS
Using a registered door control transmitter assembly, turn the ignition switch to ON.
Check that the engine starts 5 seconds after the ignition switch was turned to ON.
OK |
---|
Engine starts normally. |
NG |
GO TO SFI SYSTEM Click here |
OK |
END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)