Component Description
| Component parts | Reference/Function |
|---|---|
| AWD control unit | " AWD CONTROL UNIT " |
| Wheel sensors | " WHEEL SENSOR AND SENSOR ROTOR " |
| AWD solenoid | " AWD SOLENOID " |
| Electric controlled coupling | " ELECTRIC CONTROLLED COUPLING " |
| AWD warning lamp | " AWD WARNING LAMP " |
| AWD LOCK indicator lamp | " AWD LOCK INDICATOR LAMP " |
| AWD LOCK switch | " AWD LOCK SWITCH " |
| ABS actuator and electric unit (control unit) | Transmits/receives the signals for control of AWD system via CAN communication line to/from AWD control unit. For transmitting/receiving mainly signals, refer to " AWD SYSTEM: SYSTEM DIAGRAM " |
| ECM | Transmits/receives the signals for control of AWD system via CAN communication line to/from AWD control unit. For transmitting/receiving mainly signals, refer to " AWD SYSTEM: SYSTEM DIAGRAM " |
| Combination meter | Transmits/receives the signals for control of AWD system via CAN communication line to/from AWD control unit. For transmitting/receiving mainly signals, refer to " AWD SYSTEM: SYSTEM DIAGRAM " |
| Steering angle sensor | Transmits/receives the signals for control of AWD system via CAN communication line to/from AWD control unit. For transmitting/receiving mainly signals, refer to " AWD SYSTEM: SYSTEM DIAGRAM " |
AWD SYSTEM: System Description
- AWD controls distribution of drive power between front-wheel drive (100:0) and 4-wheel drive (50:50) conditions according to signals from sensors.
- By receiving the steering angle sensor signal, yaw rate sensor signal, side G sensor signal and decel G sensor signal, vehicle with VDC corrects a torque distribution for front and rear wheels according to a driving operation and a behavior of the vehicle during cornering and improves driveability and safety on a slippery road surface.
ECU IDENTIFICATION
AWD control unit part number can be read.
Description
Use this mode to determine and identify the details of a malfunction based on self-diagnostic results or data monitor. AWD control unit gives drive signal to actuator with receiving command from CONSULT to check operation of actuator.
| Test item | Condition | Description |
|---|---|---|
| ETS S/V (Detects AWD solenoid) | Vehicle stopped Engine running No DTC detected | Change command current value to AWD solenoid, and then change driving mode. (Monitor value is normal if it is within approx. ±10% of command value.) Qu: Increase current value in increments of 0.2 A Qd: Decrease current value in increments of 0.2 A UP: Increase current value in increments of 0.02 A DOWN: Decrease current value in increments of 0.02 A |
TEST ITEM
| CAUTION | Never energize continuously for a long time. |
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit communicate data but selectively reads required data only.
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit communicate data but selectively reads required data only.
AWD warning lamp does not turn ON when the ignition switch is turned to ON.
AWD warning lamp does not turn OFF approx. 1 second after the engine started.
Heavy tight-corner braking symptom occurs when the vehicle is driven and the steering wheel is turned fully to either side after the engine is started.
Note. Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction.
Vehicle does not enter 4-wheel drive mode even though AWD warning lamp turned to OFF.
While driving, AWD warning lamp blinks 2 times in 1 second and it turns OFF after 1 minute.
- This symptom protects drivetrain parts when a heavy load is applied to the electric controlled coupling and multiple disc clutch temperature increases. Also, optional distribution of torque sometimes becomes rigid before lamp blinks quickly. Both cases are not malfunction. Refer to " «PROTECTION FUNCTION»(ref-600169-S09826753272014022400000) ".
- When this symptom occurs, stop vehicle and allow it to idle for some times. Blinking will stop and system will be restored.
AWD warning lamp blinks at approximately 2 seconds intervals while driving.