System Description
THEFT DETERRENT / KEYLESS ENTRY: PUSH-BUTTON START: SYSTEM DESCRIPTION
1. PUSH-BUTTON START DESCRIPTION
(a) The push-button start uses a push-type power switch, which the driver can operate by merely carrying the electrical key. This system consists primarily of the power management control ECU, power switch, transmission control ECU assembly, electrical key, ACC relay, P/POINT relay, IG1 NO. 1 relay, IG1 NO. 2 relay, IG1 NO. 3 relay, IG2 relay, ID code box (immobiliser code ECU)* and certification ECU (smart key ECU assembly). The power management control ECU controls the system. This function operates in cooperation with the push button start.
HINT
In this chapter, the expression "power source" has been used in some locations to allow precise explanations. The power source mode is also expressed using conventional expressions such as "power switch off", "power switch on (ACC)" and "power switch on (IG)".
* *: for Canada
2. FUNCTION OF MAIN COMPONENTS
* *: for Canada
3. SYSTEM FUNCTION
The electric controls of the push-button start function are described below:
* *: for Canada
4. WARNING FUNCTION
(a) Warning
(1) When any of the situations below occur, the smart key system causes the certification ECU (smart key ECU assembly) to sound a buzzer in the combination meter assembly and the wireless door lock buzzer assembly, a message to appear on the multi-information display, and the power switch illumination to operate in order to alert the driver.
(2) Situation A
* There are 2 patterns for situation A.
* Pattern 1:
When the hybrid vehicle control system is left running and the shift lever is in R, N, D or B, the driver opens the door and attempts to get out of the vehicle.
In this situation, the following control is performed:
* Pattern 2:
Under the situation of pattern 1, the driver closes the door and attempts to leave the vehicle while holding the key.
In this situation, the following control is performed:
(3) Situation B
* There are two patterns for situation B.
* Pattern 1:
When the driver door is open, the driver turns the power switch on (ACC) and attempts to leave the vehicle.
* Pattern 2:
When the driver door is open, the driver turns the power switch from on (IG) to off and attempts to leave the vehicle.
In these situations, the following control is performed:
(4) Situation C
* There are 2 patterns for situation C.
* Pattern 1:
When the hybrid vehicle control system is left running and park (P) is selected, the driver closes the driver door and attempts to leave the vehicle while holding the key.
In this situation, the following control is performed:
* Pattern 2:
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:
(5) Situation D
* When the hybrid vehicle control system is left running, a passenger leaves the vehicle while holding the key.
In this situation, the following control is performed:
(6) Situation E
* When the key is not in the vehicle or the key battery is dead, the driver attempts to start the hybrid vehicle control system or turn the power switch on (IG).
In this situation, the following control is performed:
(7) Situation F
* The vehicle is driven using a key that has a low battery.
In this situation, the following control is performed:
(8) Situation G
* A malfunction of the power management control ECU is detected.
In this situation, the following control is performed:
(9) Situation H
* There are two patterns for situation J.
* Pattern 1:
A warning message appears on the multi-information display when the driver does not follow the proper procedure to start the vehicle.
In this situation, the following control is performed:
* Pattern 2:
A message indicating how to start the hybrid vehicle control system appears on the multi-information display when the shift lever is in a position in which the hybrid vehicle control system cannot be started.
In this situation, the following control is performed:
(10) Situation I
* There are two patterns for situation K.
* Pattern 1:
When the power switch is pushed, the key cannot be detected in the vehicle two times in a row.
In this situation, the following control is performed:
* Pattern 2:
The driver attempts to start the hybrid vehicle control system after performing a driver door key linked unlock operation.
In this situation, the following control is performed:
(11) Situation J
* A warning message appears on the multi-information display when the driver attempts to turn the power switch off with the shift lever in R, N, D or B.
In this situation, the following control is performed:
(12) Situation K
* A warning message appears on the multi-information display when automatic power off operation occurs.
In this situation, the following control is performed:
(13) Situation L
* A warning message appears on the multi-information display when a key with a depleted battery is touched to the power switch while depressing the brake.
In this situation, the following control is performed:
*: This situation occurs following situation M.
(14) Situation M
* A warning message appears on the multi-information display when the vehicle starts moving without the registered key in the vehicle interior.
In this situation, the following control is performed:
5. CONSTRUCTION AND OPERATION
(a) Power Switch
The power switch consists of a momentary type switch, 3 color (amber, green, greenish white) LEDs, and a transponder key amplifier.
* The greenish white LED is for illumination.
* The amber and green LEDs are for the indicator lights. The driver can check the present power source mode and whether the hybrid control system can start in accordance with the illumination state of the indicator light.
* When the power management control ECU detects an abnormality in the push-button start system, it makes the amber indicator light flash. If the hybrid control system stopped in this state, it may not be possible to restart it.
(b) Indicator Light Condition
Power Switch Indicator Light Condition
(c) Power Management Control ECU
The power management control ECU consists of the IG1 NO. 1, IG1 NO. 2, IG1 NO. 3, IG2, ACC, P/POINT relay actuation circuits and CPU.
HINT
Before removing the auxiliary battery, make sure to turn the power switch off. The power management control ECU constantly stores the present power source mode in its memory. Therefore, if the power supply for the power management control ECU is interrupted by disconnecting the auxiliary battery, the power management control ECU restores the power source mode after the auxiliary battery is reconnected. For this reason, if the auxiliary battery is disconnected when the power switch is other than off, the power source mode will be restored to the vehicle at the same time the power source mode is restored to the power management control ECU (by reconnecting the auxiliary battery).
6. PUSH-BUTTON START FUNCTION OPERATION
(a) This system has different power source mode patterns depending on the brake pedal condition and shift lever position.
When the key battery is low, the push-button start function can be operated by holding the key against the power switch.
* After approximately 1 hour has elapsed with the power switch on (ACC) or on (IG) and park (P) selected, the power management control ECU will automatically cut the power supply (the power source mode will change to off).
* The illustration below shows the transition of power source modes.
Transition of power source modes:
HINT
While the vehicle is being driven normally, operation of the power switch is disabled. However, if the hybrid control system must be stopped in an emergency while the vehicle is being driven, pressing the power switch 3 times quickly or pressing and holding the power switch for 3 seconds or more stops the hybrid control system. The power source mode will change from on (READY) to on (ACC).
7. WHEN KEY BATTERY IS LOW
(a) To operate the push-button start function when the key battery is low, hold the key close to the power switch with the brake pedal depressed.
(b) The power management control ECU transmits a key verification request signal to the certification ECU (smart key ECU assembly) when it receives the stop light switch signal.
(c) The certification ECU (smart key ECU assembly) does not receive an ID code response from the entry door control receiver, so it actuates the transponder key amplifier built into the power switch.
(d) The transponder key amplifier outputs an engine immobiliser radio wave to the key.
(e) The key receives the radio wave, and returns a radio wave response to the transponder key amplifier.
(f) The transponder key amplifier combines the key ID codes with the radio wave response, and transmits it to the certification ECU (smart key ECU assembly).
(g) The certification ECU (smart key ECU assembly) judges and verifies the ID code, and transmits a key verification OK signal to the power management control ECU. The buzzer in the combination meter sounds at the same time.
(h) After the buzzer sounds, if the power switch is pressed within 10 seconds with the brake pedal not depressed, the power source mode changes to on (ACC) or on (IG), the same as in the normal condition.
HINT
The key (for card type) operation inspection can performed using the same procedure as for the key (for standard type).
8. DIAGNOSIS
The power management control ECU can detect malfunctions in the push-button start function when the power source mode is on (IG).
When the ECU detects a malfunction, the amber indicator light of the power switch flashes to warn the driver. At the same time, the ECU stores a 5-digit Diagnostic Trouble Code (DTC) in its memory.
* The indicator light warning continues for 15 seconds even after the power source mode is changed to off.
* The DTC can be read by connecting the Techstream to the DLC3.
* The push-button start function cannot be operated if a malfunction occurs.
9. KEY DIAGNOSTIC MODE
HINT
Key diagnostic mode checks if the key within a selected antenna detection area is operating normally. The results are output through the wireless door lock buzzer assembly.
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Smart Key / Utility / Key Communication Check.
(e) Check the values by referring to the table below.
Smart Key (Certification ECU (Smart Key ECU Assembly))
(f) When the key is brought near the selected antenna, check that the wireless door lock buzzer sounds.
(1) *1: No. 1 indoor electrical key antenna assembly (for front floor)
HINT
Place the key on the driver or front passenger seat cushion.
(2) *2: No. 2 indoor electrical key antenna assembly (for center floor)
HINT
Place the key on the rear seat cushion.
(3) *3: No. 3 indoor electrical key antenna assembly (for rear floor)
HINT
Place the key on the luggage area.