Component Description
| Component | Description |
|---|---|
| Push-button ignition switch | Push-button ignition switch (push switch) is pressed, and transmits the status signal to BCM and IPDM E/R. |
| IPDM E/R | IPDM E/R detects push-button ignition switch (push switch) status, and transmits push-button ignition switch status signal (CAN) to BCM. IPDM E/R receives ignition relay (IPDM E/R) control signal and ignition switch ON signal (CAN) from BCM, and controls ignition relay (built in IPDM E/R) |
| BCM | BCM controls power distribution system. BCM judges ignition switch position by push-button ignition switch (push switch) and vehicle condition BCM checks the ignition switch position internally. |
| Blower relay (in fuse block) | Blower relay is controlled by BCM. Blower relay supplies the ignition switch ON power supply or the ignition switch ON signal to air conditioning system when ignition switch is turned ON. BCM compares status of blower relay control signal and ignition switch position judged by BCM. |
| Accessory relay-1 (in fuse block) | Accessory relay is controlled by BCM. Accessory relay supplies the accessory power supply or the ignition switch ACC signal to each ECU when ignition switch is turned ACC or ON. BCM compares status of accessory relay control signal, and ignition switch position judged by BCM. |
| Ignition relay-2 (in fuse block) | Ignition relay is controlled by BCM. Ignition relay supplies the ignition switch ON power supply or the ignition switch ON signal to each ECU and system when ignition switch is turned ON. BCM compares status of ignition relay control signal and ignition switch position judged by BCM. BCM monitors the ignition relay operating status by the ignition relay feedback signal. |
Scheme 92
SYSTEM DESCRIPTION
- PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the push-button ignition switch and performs the power distribution to each power circuit. This system is used instead of the mechanical power supply changing mechanism with the operation of the conventional key cylinder.
- The push-button ignition switch can be operated when Intelligent Key is in the following condition. Intelligent Key is in the detection area of the inside key antenna. Intelligent Key backside is contacted to push-button ignition switch.
- The push-button ignition switch operation is input to BCM as a signal. BCM changes the power supply position according to the status and operates the following relays to supply power to each power circuit. Ignition relay-1 Ignition relay-2 Accessory relay-1 Accessory relay-2 Blower motor relay NOTE: The engine switch operation changes due to the conditions of brake pedal, selector lever and vehicle speed.
- The power supply position can be confirmed with the lighting of the indicators in the push-button ignition switch.
The power supply position changing operation can be performed with the following operations.
Note. When an Intelligent Key is within the detection area of inside key antenna and when Intelligent Key backside is contacted to push-button ignition switch, it is equivalent to the operations below. When starting the engine, the BCM monitors under the engine start conditions: Brake pedal operating condition Selector lever position Vehicle speed
| Power supply position | Engine start/stop condition | Push-button ignition switch operation frequency | |
|---|---|---|---|
| Selector lever position | Brake pedal operation condition | ||
| OFF --> ACC | Not depressed | 1 | |
| OFF --> ACC --> ON | Not depressed | 2 | |
| OFF --> ACC --> ON --> OFF | Not depressed | 3 | |
| OFF --> START ACC --> START ON --> START | P or N position | Depressed | 1 |
| Engine is running --> OFF | 1 | ||
VEHICLE SPEED SPECIFICATION - LESS THAN 4 KM/H (2.5 MPH)
| Power supply position | Engine start/stop condition | Push-button ignition switch operation frequency | |
|---|---|---|---|
| Selector lever position | Brake pedal operation condition | ||
| Engine is running --> ACC | Emergency stop operation | ||
| Engine stall return operation while driving | N position | Not depressed | 1 |
VEHICLE SPEED SPECIFICATION - 4 KM/H (2.5 MPH) OR MORE
Emergency stop operation
- Press and hold the push-button ignition switch for 2 seconds or more.
- Press the push-button ignition switch 3 times or more within 1.5 seconds.
Description
Refer to " CAN COMMUNICATION SYSTEM: SYSTEM DESCRIPTION ".
Check that vehicle is under the condition shown in "Conditions of vehicle" before starting diagnosis, and check each symptom.
Note. The engine start function, door lock function, power distribution system, and NATS-IVIS/NVIS in the Intelligent Key system are closely related to each other regarding control. The vehicle security function can operate only when the door lock and power distribution system are operating normally.