SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
The following pattern will be used: "Operation" indicates user operation using the smart key system. "Expected operation of the vehicle" indicates how a known good vehicle will react in accordance with each operation. "Suspected Area/Diagnosis" indicates suspected malfunctioning areas and tips for each diagnosis if the vehicle did not react as expected.
(a) Example: Operation No.
Operation |
- |
Expected operation of the vehicle |
- |
Waveform or Output Value |
- |
Suspected Area |
Diagnosis |
---|---|
- |
- |
2. BASIC PRECAUTIONS
(a) DTC numbers and ECU Data Lists of the smart key system can be checked using the Techstream.
(b) Check for DTCs using the following procedure. If any DTCs are output, diagnose those DTCs first.
(1) Connect the Techstream to the DLC3.
(2) Turn the engine switch on (IG).
(3) Enter the following menus: Body Electrical / Smart Key, Power Source Control or Starting Control / Trouble Codes.
(c) If the engine switch cannot be turned on (IG), follow the procedure below to start communication between the Techstream and vehicle.
(1) 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.
(d) If cancel is selected for the smart key system customize setting, cancel the smart key cancel setting (See page ).
3. DIAGRAM OF SMART KEY SYSTEM
4. MULTI CHANNEL FUNCTION
(a) The electrical key transmitter sub-assembly and electrical key and TPMS receiver assembly can operate on two different RF channels. When an electrical key transmitter sub-assembly is brought within an exterior detection area, key verification begins. If key verification fails due to wave interference, the channel will be switched and key verification will be performed again.
The multi channel system begins verification using the channel on which the last verification was successfully performed. When verification fails, the system switches to the other channel.
Text in Illustration
*a |
Exterior detection areas are created using LF waves (emitted from the vehicle at intervals of 0.25 seconds) to receive a response from the electrical key transmitter sub-assembly. |
*b |
When the electrical key transmitter sub-assembly is brought into an exterior detection area, it receives LF waves from the vehicle. Using RF waves, the electrical key transmitter sub-assembly responds to the vehicle. |
*c |
Upon receiving the response from the electrical key transmitter sub-assembly, the certification ECU (smart key ECU assembly) activates the electrical key antennas (outside) one by one. Using LF waves, the certification ECU (smart key ECU assembly) determines which exterior detection area the electrical key transmitter sub-assembly is in. |
*d |
The electrical key transmitter sub-assembly receives the LF waves from the vehicle and responds using RF waves. (The certification ECU (smart key ECU assembly) recognizes which exterior detection area the electrical key transmitter subassembly is in.) |
*e |
The certification ECU (smart key ECU assembly) sends registered key ID information to the electrical key transmitter sub-assembly using LF waves. (Up to 7 key IDs can be registered.) |
*f |
The electrical key transmitter sub-assembly sends the key ID information using RF waves. When the certification ECU (smart key ECU assembly) receives it, verification completes. |
*g |
Wave interference (Channel switching) |
- |
- |
The multi channel system changes the channels when the RF band (*b, *d and *f) is interrupted by wave interference.
Refer to the table below to confirm when the system changes the channels.
*b or *d is NG |
*f is NG |
|||
---|---|---|---|---|
Condition |
RF waves cannot be received. |
RF waves cannot be received properly. |
RF waves cannot be received. |
RF waves cannot be received properly. |
Channel switching |
The channels will not be switched. |
The channels will be switched. |
The channels will not be switched. |
The channels will be switched*. |
HINT:
When the channels are switched, the history will be stored in the certification ECU (smart key ECU assembly). This history can be read using the Techstream. (See page ).
5. SMART KEY SYSTEM SPECIFICATIONS
(a) Some customers may inquire about the frequency used by the smart key system (for Entry Function) on various models. This repair manual contains the applicable specifications of the smart key system (for Entry Function).
Text in Illustration
*a |
Transmitter Detection Area |
- |
- |
Specification |
||||
---|---|---|---|---|
Frequency |
Output Power/Electric Field Intensity |
Modulation Method |
Mounting Point in Vehicle |
|
Inside Passenger Compartment |
134.2 kHz |
94.4 dBuV/m at 3 m |
AM |
Inside front floor |
Outside Vehicle |
134.2 kHz |
95 dBuV/m at 3 m |
AM |
Inside door handle |
Transmission Timing |
|||
---|---|---|---|
Vehicle Remains Parked |
Entering or Exiting the Vehicle |
Vehicle is being Driven |
|
Inside Passenger Compartment |
Does not transmit |
|
When electrical key transmitter sub-assembly is not detected inside passenger compartment while car is being driven (transmits for 4 seconds) |
Outside Vehicle |
(1) When door is locked, transmits at 250 ms intervals (stops when door is unlocked) (2) Does not transmit |
(1) Touch the lock sensor (2) Touch the unlock sensor at power saving mode |
Does not transmit |
6. DIAGNOSIS IN ACCORDANCE WITH USER OPERATION
(a) Operation 1
Operation |
Turn the engine switch off and lock all the doors, then take the electrical key transmitter sub-assembly approximately 3 m (9.84 ft.) or more away from the vehicle. HINT: The detection area of each electrical key antenna (outside) is formed by emitting a periodic LF band request signal every 0.25 seconds. The detection area formed by each front door outside handle assembly (electrical key antenna) has a detection range of approximately 0.7 m (2.30 ft.). |
Waveform or Output Value |
Pulse generation (C29-4 (CLG1) - C29-11 (E)*) |
(b) Operation 2
Operation |
Bring the electrical key transmitter sub-assembly within 0.7 m (2.30 ft.) of the driver door. HINT: The system is in unlock standby mode when the electrical key transmitter sub-assembly is in the detection area and the key ID code sent by the electrical key transmitter sub-assembly matches the key ID code stored by the certification ECU (smart key ECU assembly). The door unlocks if the unlock sensor is touched by hand with the system in unlock standby mode. Signal transmission: Certification ECU (smart key ECU assembly) → Front door outside handle assembly LH (electrical key antenna) → Electrical key transmitter sub-assembly → Electrical key and TPMS receiver assembly → Certification ECU (smart key ECU assembly) → Main body ECU (multiplex network body ECU) |
Expected operation of the vehicle |
The electrical key transmitter sub-assembly LED starts blinking. If it does not, any of the parts listed in the table below may be malfunctioning. |
Waveform or Output Value |
|
Suspected Area |
Diagnosis |
---|---|
Electrical key transmitter sub-assembly |
HINT: Before replacing the electrical key transmitter sub-assembly, check if the transmitter battery is depleted. |
Transmitter battery is depleted |
|
Wave Interference |
|
Certification ECU (smart key ECU assembly) |
- |
Front door outside handle assembly LH |
Vehicle exterior detection area is not formed properly.
|
Electrical Key and TPMS Receiver Assembly |
|
Vehicle Battery is discharged |
It may be possible to tell whether the vehicle battery is discharged by operating the horn. |
Others |
|
(c) Operation 3
Operation |
Touch the unlock sensor of the driver door with the electrical key transmitter sub-assembly in the exterior detection area. |
Expected operation of the vehicle |
While the doors are unlocked, the answer back is performed at the same time. If they do not, any of the parts listed in the table below may be malfunctioning. |
Waveform or Output Value |
|
Suspected Area |
Diagnosis |
---|---|
The suspected parts below overlap with the parts covered in operation 2 for when the electrical key transmitter sub-assembly LED does not blink. |
- |
Front door outside handle assembly LH (unlock sensor) |
Under normal operation, "ON" is displayed for the Data List item "D-Door Touch Sensor" when the unlock sensor is touched. |
Door lock/unlock mechanism |
If a door cannot be locked/unlocked by operating the door control switch on the door in the cabin, the door lock mechanism is malfunctioning. |
(d) Operation 4
Operation |
After getting into the vehicle while carrying the electrical key transmitter sub-assembly, close the door and press the engine switch once with the shift lever in P while not depressing the brake pedal. |
Expected operation of the vehicle |
If it does not, the parts listed below may be malfunctioning. HINT: When the engine switch is pressed, the indoor electrical key antenna forms a key detection area inside the vehicle and detects the electrical key transmitter sub-assembly in the cabin. The electrical key transmitter sub-assembly sends the ID code upon receiving a request signal and the electrical key transmitter sub-assembly LED illuminates for a short time. After pressing the engine switch, if the key ID code sent by the electrical key transmitter sub-assembly matches the key ID code stored by the certification ECU (smart key ECU assembly), the ACC relay turns on and the "ACCESSORY" is displayed on multi-information display in combination meter assembly. Then after the power source mode has changed and L code verification has been completed, the steering wheel will be unlocked and the immobiliser will be inactive. Then the Data List status of "Immobiliser" will be changed from "Set" to "Unset". Signal transmission: Certification ECU (smart key ECU assembly) → Indoor electrical key antenna → Electrical key transmitter sub-assembly → Certification ECU (smart key ECU assembly) HINT: The interior detection area is formed when any of the following conditions are met:
|
Waveform or Output Value |
|
Suspected Area |
Diagnosis |
---|---|
Certification ECU (smart key ECU assembly) |
- |
Wave Interference |
|
Indoor electrical key antenna assemblies that form the interior detection areas. |
|
Engine switch |
Under normal operation, after the engine switch is pressed, "ON" is displayed for the Data List items "Start Switch1" and "Start Switch2". |
Steering lock ECU (steering lock actuator or UPR bracket assembly) |
|
HINT:
The electrical key transmitter sub-assembly, the transmitter battery and the vehicle battery have already been inspected in the previous operation steps. However, if they have not been inspected, inspect them.
(e) Operation 5
Operation |
Depress the brake pedal with the shift lever in P while carrying an electrical key transmitter sub-assembly. |
Expected operation of the vehicle |
The smart warning light appear on the multi-information display. If it does not, the parts listed below may be malfunctioning. |
Suspected Area |
Diagnosis |
---|---|
Stop light switch assembly |
If the brake pedal is depressed, "ON" is displayed for the Data List item "Stop Light Switch1". |
Certification ECU (smart key ECU assembly) |
Start function-Terminals of ECU (See page ). |
(f) Operation 6
Operation |
After getting into the vehicle while carrying the electrical key transmitter sub-assembly, press the engine switch with the shift lever in P while depressing the brake pedal. |
Expected operation of the vehicle |
The engine starts. If it does not, the parts listed below may be malfunctioning. HINT: If the engine switch is pressed with the steering wheel unlocked, 12 V will be supplied from terminal STAR of the certification ECU (smart key ECU assembly) to the ST relay. |
Suspected Area |
Diagnosis |
---|---|
Steering lock system |
Under normal operation, the steering wheel will be unlocked and "ON" is displayed for the Data List item "Steering Unlock Switch". |
Certification ECU (smart key ECU assembly) |
The Data List item "Starter SW" is an instruction to operate the starter. If this turns "ON", 12 V will be supplied from terminal STAR of the certification ECU (smart key ECU assembly) to the ST relay. |
Starter relay |
The Data List item "Starter Relay" indicates the voltage at the STA terminal of the certification ECU (smart key ECU assembly). This indicates whether voltage is being supplied to the ST relay. |
Starter |
- |
Vehicle Battery is discharged |
Whether the vehicle battery is discharged or not can be checked easily by operating the horn. |
(g) Operation 7
Operation |
Press the engine switch. |
Expected operation of the vehicle |
The engine stops, the smart warning light illuminates green and then goes off and the security indicator light changes from off to blinking. |
(h) Operation 8
Operation |
Open any of the doors with the engine switch off. |
Expected operation of the vehicle |
The steering wheel locks. If it does not, the parts listed below may be malfunctioning. |
Suspected Area |
Diagnosis |
---|---|
Steering lock system |
- |
Door courtesy light switch assembly |
When any of the doors are opened, "OFF" is displayed for the Data List item "FL Door Courtesy". |
(i) Operation 9
Operation |
Touch the lock sensor of the driver door outside handle while carrying the electrical key transmitter sub-assembly. |
Expected operation of the vehicle |
Answer back is performed at the same time when the doors are locked. |
7. VEHICLE BATTERY SAVING FUNCTION
(a) When the smart key system is operating, the vehicle performs key detection operations every 0.25 seconds. Therefore, if the vehicle is left as is for a long period of time, the vehicle battery may become fully discharged. The following controls help reduce the rate at which the vehicle battery is discharged.
(1) If the smart key system is not operated for 5 days or more, periodic signal transmission from the electrical key antennas stops. However, the doors can still be unlocked by touching the unlock sensor of a front door outside handle assembly LH.
(2) If the smart key system is not operated for 14 days or more, the lock and unlock sensors of the front passenger door outside handle assembly are disabled. Therefore, only the unlock sensor of the front door outside handle assembly LH can be used to unlock the doors.
(3) If 10 minutes or more elapse while the electrical key transmitter sub-assembly is in an exterior detection area, the front door outside handle assembly LH (electrical key antenna) detecting the electrical key transmitter sub-assembly will stop operating.
(b) To restore operation of the smart key system, perform any of the following operations.
(1) While carrying the electrical key transmitter sub-assembly, touch the lock or unlock sensor of the front door outside handle assembly LH and perform a door lock or unlock operation.
(2) Lock or unlock the doors with the wireless operation.
(3) Insert the mechanical key into the door key cylinder of the driver door and lock or unlock the doors.
8. WIRELESS DOOR LOCK BUZZER VOLUME ADJUSTMENT FUNCTION
(a) The volume of the wireless door lock buzzer can be changed through the customize function.
HINT:
The volume of the following wireless door lock buzzer operations cannot be adjusted.
9. WARNING FUNCTION
(a) Warning
(1) Situation: The engine is left running and the shift lever is in a position other than P when the driver gets out of the vehicle.
When the engine is left running and the shift lever is in a position other than P, the driver opens the door and attempts to get out of the vehicle.
In this situation, the following control is performed:
Reason for warning |
Sudden vehicle start, vehicle theft, vehicle roll-away |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (One of conditions is met) |
|
Under the situation of pattern 1, the driver closes the door and attempts to leave the vehicle while holding the electrical key transmitter sub-assembly.
In this situation, the following control is performed:
Reason for warning |
Sudden vehicle start, vehicle theft, vehicle roll-away |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (One of conditions is met) |
|
(2) Situation: The key reminder sounds.
When the driver door is open, the driver turns the engine switch on (ACC) and attempts to leave the vehicle.
Reason for warning |
Vehicle theft |
Warning Start Condition (All conditions are met) |
Condition 1
|
Condition 2 (Approval for one second or more)
|
|
Warning description |
|
Warning Stop Condition (One of conditions is met) |
The warning is stopped when one of the following conditions is met:
|
(3) Situation: The engine is left running with the shift lever in P when the driver gets out of the vehicle.
When the engine is left running with the shift lever in P, the driver closes the driver door and attempts to leave the vehicle while carrying the electrical key transmitter sub-assembly.
In this situation, the following control is performed:
Reason for warning |
Vehicle theft |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
Under the situation of pattern 1, the driver touches the lock sensor on the door outside handle assembly.
In this situation, the following control is performed:
Reason for warning |
Vehicle theft |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (One of conditions is met) |
|
(4) Situation: The engine is left running when a passenger gets out of the vehicle while carrying the electrical key transmitter sub-assembly.
When the engine is left running, a passenger leaves the vehicle while carrying the electrical key transmitter sub-assembly.
In this situation, the following control is performed:
Reason for warning |
Engine cannot be restarted |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
(5) Situation: The electrical key transmitter sub-assembly is not in the detection areas.
When the electrical key transmitter sub-assembly is not in the vehicle or the transmitter battery is depleted, the driver attempts to start the engine or turn the engine switch on (IG).
In this situation, the following control is performed:
Reason for warning |
Confuses the user |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
(6) Situation: The vehicle is driven without an electrical key transmitter sub-assembly.
When the vehicle starts moving without the registered electrical key transmitter sub-assembly in the vehicle.
In this situation, the following control is performed:
Reason for warning |
Engine cannot be restarted |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
(7) Situation: The electrical key transmitter sub-assembly is left in the vehicle.
The lock sensor on a front door outside handle assembly LH is touched to perform entry lock with the electrical key transmitter sub-assembly left in the vehicle.
In this situation, the following control is performed:
Reason for warning |
Vehicle theft |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (One of conditions is met) |
|
(8) Situation: Door is ajar.
The lock sensor on the door outside handle assembly is touched to perform entry lock with a door open.
In this situation, the following control is performed:
Reason for warning |
Vehicle theft |
Warning Start Condition (All conditions are met) |
|
Warning description |
Wireless buzzer sounds continuously for 5 seconds. |
Warning Stop Condition (One of conditions is met) |
|
(9) Situation: The electrical key transmitter sub-assembly is locked inside the vehicle.
With a door open and the electrical key transmitter sub-assembly in the vehicle, the lock knob is locked and then the door is closed with the door handle being pulled.
In this situation, the following control is performed:
Reason for warning |
Vehicle theft |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition (Any condition is met) |
|
(10) Situation: The transmitter battery is weak.
The vehicle is driven using an electrical key transmitter sub-assembly that has a low transmitter battery.
In this situation, the following control is performed:
Reason for warning |
Usability function, engine cannot be restarted |
Warning Start Condition (All conditions are met) |
Condition 1
|
Condition 2
|
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
(11) Situation: The steering wheel cannot be released.
The steering wheel cannot be released, thus the engine is prevented from starting.
The shift lever is moved to a position other than P before the steering wheel is unlocked.
In this situation, the following control is performed:
Reason for warning |
Usability function |
Warning Start Condition |
|
Warning description |
|
Warning Stop Condition |
|
(12) Situation: The smart key system is malfunctioning. An IG circuit malfunction, vehicle speed signal malfunction or malfunction that interferes with steering lock ECU (steering lock actuator or UPR bracket assembly) operation, has been detected.
In this situation, the following control is performed:
Reason for warning |
Malfunction detection |
Warning Start Condition (One of conditions is met) |
|
Warning description |
|
Warning Stop Condition |
|
(13) Situation: The engine does not start. (Situation A)
When the engine switch is pressed, the electrical key transmitter sub-assembly cannot be detected in the vehicle two times in a row.
In this situation, the following control is performed:
Reason for warning |
Usability function |
Warning Start Condition (One of conditions is met) |
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
(14) Situation: The engine does not start. (Situation B)
The engine might be started (when the driver gets in the vehicle, or the engine switch is turned on (ACC)).
In this situation, the following control is performed:
Possible effects without warning |
Engine cannot be restarted |
Warning Start Condition (Either condition is met) |
|
Warning description (Not displayed while the opening image is displayed.) |
|
Warning Stop Condition (One condition is met) |
|
The engine might be started (when the engine switch is on (IG)).
In this situation, the following control is performed:
Possible effects without warning |
Engine cannot be restarted |
Warning Start Condition (Either condition is met) |
|
Warning description |
|
Warning Stop Condition (One condition is met) |
|
(15) Situation: The engine switch cannot be turned off.
A warning message appears on the multi-information display when the driver attempts to turn the engine switch off with the shift lever in any position other than P or N.
In this situation, the following control is performed:
Reason for warning |
Discharged vehicle battery, vehicle roll-away |
Warning Start Condition |
The engine switch is turned off with both conditions below met.
|
Warning description |
|
Warning Stop Condition |
|
Under the situation of pattern 1, the shift lever is moved to P.
In this situation, the following control is performed:
Reason for warning |
Discharged vehicle battery, vehicle roll-away |
Warning Start Condition |
|
Warning description |
|
Warning Stop Condition (Either condition is met) |
|
(16) Situation: Auto power off operation occurs.
A warning message appears on the multi-information display when automatic power off operation occurs.
In this situation, the following control is performed:
Reason for warning |
Vehicle battery saving function |
Warning Start Condition (All conditions are met) |
|
Warning description |
|
Warning Stop Condition |
|
(17) Situation: Engine immobiliser system certification completion occurs.
When an electrical key transmitter sub-assembly with a depleted transmitter battery is held near to the engine switch while depressing the brake.
In this situation, the following control is performed:
Reason for warning |
Malfunction detection |
Warning Start Condition |
|
Warning description |
|
Warning Stop Condition (One of conditions is met) |
|
Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Perform "Inspection After Repairs" after replacing the engine assembly, cylinder
head sub-assembly, camshaft, No. 2 camshaft, No. 3 camshaft sub-assembly, No. 4
camshaft sub-assembly, camshaft timing gear assembly, camshaft timing exhaust g ...
Open in Outer Mirror Indicator(Slave) (C1AB5)
DESCRIPTION
This DTC is stored when the blind spot monitor sensor RH detects an open in the
blind spot monitor indicator RH.
DTC Code
DTC Detection Condition
Trouble Area
C1AB5
With the blind spot monitor main switch assembly (warning ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY LH
(a) Install a new gasket to the cylinder head LH.
NOTICE:
Be careful of the installation direction.
(b) Temporarily install the exhaust manifold sub-assembly LH with the 4 nuts.
(c) Tighten the 4 nuts in the sequenc ...