DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CLEAR DTC
CHECK FOR DTC
CONFIRM ENGINE MODELS
READ VALUE USING INTELLIGENT TESTER (IMMOBILISER FUEL CUT)
READ VALUE USING INTELLIGENT TESTER (IMMOBILISER)
READ VALUE USING INTELLIGENT TESTER (IMMOBILISER)
CHECK WHETHER ENGINE STARTS WITH OTHER KEYS
CHECK TRANSPONDER KEY AMPLIFIER (VC5 SIGNAL)
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY, IG TERMINAL VOLTAGE)
CHECK TRANSPONDER KEY AMPLIFIER (TXCT SIGNAL)
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY)
CHECK TRANSPONDER KEY AMPLIFIER (CODE SIGNAL)
CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY)
REPLACE TRANSPONDER KEY AMPLIFIER
CHECK WHETHER ENGINE STARTS
REPLACE TRANSPONDER KEY ECU ASSEMBLY
REGISTER KEY
REGISTER ECU COMMUNICATION ID
CHECK WHETHER ENGINE STARTS
REPLACE KEY
REREGISTER KEY
CHECK WHETHER ENGINE STARTS
ENGINE IMMOBILISER SYSTEM (w/o Entry and Start System) - Engine does not Start because No Initial Combustion
DESCRIPTION
When the key is inserted into the ignition key cylinder, the antenna coil receives the key code. Then the amplifier amplifies the ID code and outputs it to the transponder key ECU assembly.
If this symptom occurs, there may be a communication problem between the transponder key amplifier and the transponder key ECU assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
When replacing the key and transponder key ECU assembly, refer to the Service Bulletin.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
Check for DTCs ().
- Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
Result| Result | Proceed to |
| No DTC output | A |
| DTC output | B |
| | GO TO DIAGNOSTIC TROUBLE CODE CHART ()
|
|
|
Check the vehicle specifications.
Result| Result | Proceed to |
| for 1GR-FE | A |
| for 1VD-FTV | B |
| 4.READ VALUE USING INTELLIGENT TESTER (IMMOBILISER FUEL CUT) |
Turn the ignition switch off.
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.
Engine and ECT| Tester Display | Measurement Item/Range | Normal Condition | Stored as Freeze Frame Data |
| Immobiliser Fuel Cut | Status of immobiliser fuel cut/
ON or OFF | - | Yes |
- OK:
- The item in the Data List indicates "OFF".
| 5.READ VALUE USING INTELLIGENT TESTER (IMMOBILISER) |
Turn the ignition switch off.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Enter the following menus: Body / Immobiliser / Data List.
Immobiliser| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| Immobiliser | Engine immobiliser system status determined by transponder key ECU assembly /
Set or Unset | Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder))
Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder)) | When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly. |
- OK:
- On the intelligent tester screen, the display changes between Set and Unset as shown in the table above.
| OK | |
| |
| GO TO ENGINE DOES NOT START BUT INITIAL COMBUSTION OCCURS ()
|
|
| 6.READ VALUE USING INTELLIGENT TESTER (IMMOBILISER) |
Perform inspection using a different key that has been registered to the vehicle.
Turn the ignition switch off.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON.
Turn the intelligent tester on.
Enter the following menus: Body / Immobiliser / Data List.
Immobiliser| Tester Display | Measurement Item/Range | Normal Condition | Diagnostic Note |
| Immobiliser | Engine immobiliser system status determined by transponder key ECU assembly /
Set or Unset | Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder))
Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder)) | When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly. |
- OK:
- On the intelligent tester screen, the display changes between Set and Unset as shown in the table above.
| 7.CHECK WHETHER ENGINE STARTS WITH OTHER KEYS |
Perform inspection using a different key that has been registered to the vehicle.
Turn the ignition switch to ON, wait for 5 seconds, and then attempt to start the engine.
Result| Result | Proceed to |
| Engine cannot be started | A |
| Engine can be started | B |
| A | |
| |
| GO TO ENGINE DOES NOT START BUT INITIAL COMBUSTION OCCURS ()
|
|
| 8.CHECK TRANSPONDER KEY AMPLIFIER (VC5 SIGNAL) |
Disconnect the E95 transponder key amplifier connector.
Using an oscilloscope, check the waveform.
Waveform (Reference)
Measurement Condition| Item | Content |
| Tester Connection | E95-1 (VC5) - Body ground |
| Tool Setting | 1 V/DIV., 20 ms./DIV. |
| Condition | Key inserted in ignition key cylinder |
- OK:
- Waveform is output normally (refer to illustration).
Text in Illustration| *a | Front view of wire harness connector
(to Transponder Key Amplifier) |
| *b | Waveform |
| OK | |
| |
| REPLACE TRANSPONDER KEY ECU ASSEMBLY |
|
| 9.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY, IG TERMINAL VOLTAGE) |
Disconnect the E95 transponder key amplifier connector.
Disconnect the E96 transponder key ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E95-1 (VC5) - E96-14 (VC5) | Always | Below 1 Ω |
| E95-7 (AGND) - E96-5 (AGND) | Always | Below 1 Ω |
| E95-1 (VC5) - Body ground | Always | 10 kΩ or higher |
Reconnect the transponder key amplifier connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| E96-2 (IG) - E96-16 (GND) | Ignition switch ON | 11 to 14 V |
Text in Illustration| *a | Front view of wire harness connector
(to Transponder Key ECU Assembly) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 10.CHECK TRANSPONDER KEY AMPLIFIER (TXCT SIGNAL) |
Disconnect the E95 transponder key amplifier connector.
Using an oscilloscope, check the waveform.
Waveform (Reference)
Measurement Condition| Item | Content |
| Tester Connection | E95-5 (TXCT) - Body ground |
| Tool Setting | 1 V/DIV., 20 ms./DIV. |
| Condition | Key inserted in ignition key cylinder |
- OK:
- Waveform is output normally (refer to illustration).
Text in Illustration| *a | Front view of wire harness connector
(to Transponder Key Amplifier) |
| *b | Waveform |
| OK | |
| |
| REPLACE TRANSPONDER KEY ECU ASSEMBLY |
|
| 11.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY) |
Disconnect the E95 transponder key amplifier connector.
Disconnect the E96 transponder key ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E95-5 (TXCT) - E96-4 (TXCT) | Always | Below 1 Ω |
| E95-5 (TXCT) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 12.CHECK TRANSPONDER KEY AMPLIFIER (CODE SIGNAL) |
Disconnect the E95 transponder key amplifier connector.
Using an oscilloscope, check the waveform.
Waveform (Reference)
Measurement Condition| Item | Content |
| Tester Connection | E95-4 (CODE) - Body ground |
| Tool Setting | 1 V/DIV., 20 ms./DIV. |
| Condition | Key inserted in ignition key cylinder |
- OK:
- Waveform is output normally (refer to illustration).
Text in Illustration| *a | Front view of wire harness connector
(to Transponder Key Amplifier) |
| *b | Waveform |
| OK | |
| |
| REPLACE TRANSPONDER KEY ECU ASSEMBLY |
|
| 13.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY) |
Disconnect the E95 transponder key amplifier connector.
Disconnect the E96 transponder key ECU assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E95-4 (CODE) - E96-15 (CODE) | Always | Below 1 Ω |
| E95-4 (CODE) - Body ground | Always | 10 kΩ or higher |
Reconnect the transponder key ECU assembly connector.
Reconnect the transponder key amplifier connector.
Using an oscilloscope, check the waveform.
Waveform (Reference)
Measurement Condition| Item | Content |
| Tester Connection | E95-4 (CODE) - Body ground |
| Tool Setting | 1 V/DIV., 20 ms./DIV. |
| Condition | Key inserted in ignition key cylinder |
- OK:
- Waveform is output normally (refer to illustration).
Text in Illustration| *a | Front view of wire harness connector
(to Transponder Key Amplifier) |
| *b | Waveform |
Result| Result | Proceed to |
| Terminal CODE stuck high (5 V) | A |
| Terminal CODE stuck low (1 V or less) | B |
| Problem in wire harness or connector | C |
| |
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 14.REPLACE TRANSPONDER KEY AMPLIFIER |
Replace the transponder key amplifier ().
| 15.CHECK WHETHER ENGINE STARTS |
Check that the engine starts with an already registered vehicle key.
- OK:
- Engine starts normally.
| OK | |
| |
| END (TRANSPONDER KEY AMPLIFIER WAS DEFECTIVE) |
|
| 16.REPLACE TRANSPONDER KEY ECU ASSEMBLY |
Replace the transponder key ECU assembly.
Reregister the key (refer to the Service Bulletin).
| 18.REGISTER ECU COMMUNICATION ID |
Register the ECU communication ID (refer to the Service Bulletin).
| 19.CHECK WHETHER ENGINE STARTS |
Check that the engine starts with an already registered vehicle key.
- OK:
- Engine starts normally.
| OK | |
| |
| END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE) |
|
Replace the transponder key master transmitter with a new one (refer to the Service Bulletin).
Reregister the key (refer to the Service Bulletin).
| 22.CHECK WHETHER ENGINE STARTS |
Check that the engine starts with an already registered vehicle key.
- OK:
- Engine starts normally.
Result| Result | Proceed to |
| OK | A |
| NG (for 1GR-FE) | B |
| NG (for 1VD-FTV) | C |
| A | |
| |
| END (KEY (TRANSPONDER KEY MASTER TRANSMITTER) WAS DEFECTIVE) |
|
