ABS Warning Lamp
The active ABS warning lamp indicates the self-test and failure status of the ABS. The ABS warning lamp shall be on
- During the initialization phase after IGN ON. (continuously 3 seconds).
- In the event of inhibition of ABS functions by failure.
- During diagnostic mode.
- When the ECU Connector is separated from ECU.
EBD/Parking Brake Warning Lamp
The active EBD warning lamp indicates the self-test and failure status of the EBD. However, in case the Parking Brake Switch is turned on, the EBD warning lamp is always turned on regardless of EBD functions. The EBD warning lamp shall be on
- During the initialization phase after IGN ON. (continuously 3 seconds).
- When the Parking Brake Switch is ON or brake fluid level is low.
- When the EBD function is out of order.
- During diagnostic mode.
- When the ECU Connector is separated from ECU.
ESC Off Warning Lamp (ESC System)
The ESC Off warning lamp indicates the self-test and failure status of the ESC.
The ESC Off warning lamp is turned on under the following conditions
- During the initialization phase after IGN ON. (continuously 3 seconds).
- In the event of inhibition of ESC functions by failure.
- When driver turns off the ESC function by on/off switch.
- During diagnostic mode.
ESC Function Lamp (ESC System)
The ESC function lamp indicates the self-test and operating status of the ESC.
The ESC Function lamp operates under the following conditions
- During the initialization phase after IGN ON. (continuously 3 seconds).
- When the ESC control is operating. (Blinking - 2Hz)
ESC On/Off Switch (ESC System)
The ESC On/Off Switch shall be used to toggle the ESC function between On/Off states based upon driver input.
The On/Off switch shall be a normally open, momentary contact switch. Closed contacts switch the circuit to ignition.
Initial status of the ESC function is on and switch toggle the state.
Scheme 55
Scheme 56
Scheme 57
| Connector Terminal | Specification | Remark | |
|---|---|---|---|
| No | Description | ||
| 31 | IGNITION1(+) | Over voltage range : 17 ± 0.5V Operating voltage range : 9.5 ± 0.5V < V < 17 ± 0.5V Low voltage range : 7.0 ± 0.5V < V < 9.5 ± 0.5V Nominal current : I < 500mA | |
| 1 | POS.BATTERY.(SOLENOID) | Max. leakage current : I < 0.8mA Operating voltage range : 9.5 ± 0.5V Nominal current : I<40A | |
| 2 | POS.BATTERY.(MOTOR) | Operating voltage range: 9.5 ± 0.5V Peak current : I<100A Nominal current : I<40A Max. leakage current : I<0.2mA | |
| 46 | GROUND | Rated current : I <500mA Nominal current : I<30A | |
| 45 | PUMP MOTOR GROUND | Peak current : I<100A Nominal current : I<30A | |
| 16 | YAW & LATERAL G SENSOR GROUND | Rated current : I <150mA | |
| 17 | YAW SENSOR POWER | Max. Output current : I<150mA Max. Output voltage : V(IGN) ± 1V | |
| 34 | BRAKE LIGHT SWITCH | Input voltage (Low) : 0V < or = V < or = 3.0V Input voltage (High) : 7.0V < or = V < or = 16.0V | |
| 32 | BRAKE SWITCH | ||
| 8 | PARKING BRAKE SWITCH | Input voltage (Low) : 0V < or = V_Low < or = 3.0V Input voltage (High) : 7.0V < or = V_High < or = 16.0V Max. input current : I<10mA | |
| 27 | SENSOR FRONT RIGHT OUTPUT | Nominal current : I<16mA External pull up resistance :1 Kohms Output duty :50 ± 20% | |
| 18 | ESC ON/OFF SWITCH | Input voltage (Low) :0V < or = V < or = 3.0V Input voltage (High) : 7.0V < or = V < or = 16.0V Max. input current:I :<10mA | |
| 15 | CAN BUS LINE(LOW) | ||
| 14 | CAN BUS LINE(HIGH) | ||
| 4 | SENSOR FRONT LEFT POWER | Output voltage : IGN (V) ± 1V Output current : Max 30mA | |
| 5 | SENSOR FRONT RIGHT POWER | ||
| 7 | SENSOR REAR LEFT POWER | ||
| 6 | SENSOR REAR RIGHT POWER | ||
| 9 | SENSOR FRONT LEFT SIGNAL | Input current LOW : 5.9 ~ 8.4mA Input current HIGH :11.8 ~ 16.8mA Frequency range :1 ~ 2500Hz Input duty : 50 ± 10% | |
| 10 | SENSOR FRONT RIGHT SIGNAL | ||
| 12 | SENSOR REAR LEFT SIGNAL | ||
| 11 | SENSOR REAR RIGHT SIGNAL | ||
| 42 | SENSOR CAN BUS LINE (High) | ||
| 43 | SENSOR CAN BUS LINE (Low) | ||
| 37 | ESC OFF W/LAMP DRIVE | Current : I<300mA(12V) Voltage range : 0 ~ 18V Min. shunt resistance : 500kohms | |
| 38 | ABS/EBD W/LAMP DRIVE | ||
| 40 | ESC F/LAMP DRIVE | ||
| 24 | STEERING ANGLE SENSOR PHASE 1 | Input duty (ST1, ST2) : 50 ± 10% Phase difference (ST1, ST2) : 2 ± 6deg High voltage : 3.0V Low voltage : 1.3V | |
| 25 | STEERING ANGLE SENSOR PHASE 2 | ||
| 26 | STEERING ANGLE SENSOR PHASE N | ||
| 3 | STEERING ANGLE SENSOR POWER | Max. Output current : I<100mA Max. Output voltage : V(IGN) ± 1V | |
| 30 | STEERING ANGLE SENSOR GROUND | Rated current : I<100mA | |
CONNECTOR TERMINAL REFERENCE
Memory of Fail Code
- It keeps the code as far as the backup lamp power is connected. (O)
- It keeps the code as far as the HCU power is on. (X)
Failure Checkup
- Initial checkup is performed immediately after the HECU power on.
- Valve relay checkup is performed immediately after the IG2 ON.
- It executes the checkup all the time while the IG2 power is on.
- Initial checkup is made in the following cases. When the failure is not detected now When ABS and ESC are not in control. Initial checkup is not made after ECU power on. If the vehicle speed is over 5 mph(8 km/h) when the brake lamp switch is off. When the vehicle speed is over 24.8 mph(40 km/h).
- Though, it keeps on checkup even if the brake lamp switch is on.
- When performing ABS or ESC control before the initial checkup, stop the initial checkup and wait for the HECU power input again.
- Judge failure in the following cases. When the power is normal. From the point in which the vehicle speed reaches 4.9 mph(8 km/h) after HECU power on.
Countermeasures In Fail
- Turn the system down and perform the following actions and wait for HECU power OFF.
- Turn the valve relay off.
- Stop the control during the operation and do not execute any until the normal condition recovers.
Warning Lamp ON
- ESC operation lamp turn on for 3sec after IGN ON.
- ESC operation lamp blinks when ESC Act.
- ESC OFF warning lamp turn on in case of ESC Switch OFF ESC Failure Detect 3sec after IGN ON
Measuring Principle
The split of the steering angle sensor detects a steering angle of the steering wheel by a ON/OFF pulse caused by whether or not the LED lights go through the hole of the split, rotating as the steering wheel revolves. There are three LEDs, two(ST1, ST2) for detecting a steering direction, and the other for the neutral position. The HECU calculates the steering angle by the pulse from the steering angle sensor.
Scheme 58
Specification
| Description | Specification |
|---|---|
| Operating voltage | 9 ~ 16 V |
| Operating temperature | 30 ~ 75 °C |
| Current consumption | Max.100 mA |
| Steering angle velocity | Max. ± 1500 °/sec |
| Voltage(high) | 3.0 V ~ 4.1 V |
| Voltage(low) | 1.3 V ~ 2.0 V |
| Pulse duty | 40 ~ 60 % |
DESCRIPTION CHART
Scheme 59
Scheme 60
| No. | Input | Output | Steering direction | Remark | |
|---|---|---|---|---|---|
| 1 | ST1 | L | L | Right | |
| ST2 | L | H | |||
| ST1 | L | H | Left | ||
| ST2 | L | L | |||
| 2 | ST1 | L | L | Left | |
| ST1 | H | L | |||
| ST1 | L | H | Right | ||
| ST2 | H | H | |||
| 3 | ST1 | H | H | Left | |
| ST2 | L | H | |||
| ST1 | H | L | Right | ||
| ST2 | L | L | |||
| 4 | ST1 | H | H | Right | |
| ST2 | H | L | |||
| ST1 | H | L | Left | ||
| ST2 | H | H | |||
STEERING POSITION