1.
Remove the air-cleaner and the intake hose.
Remove the air-cleaner and the intake hose.
Disconnect the double lock connector from the HECU by pulling it upward.
Disconnect the brake tubes from the HECU.
Remove the HECU bracket mounting bolts and remove the HECU.
Never attempt to disassemble the HECU.
The HECU must be transported and stored in an upright position and with the ports sealed. The HECU must not be drained.
Tightening torque
HECU bracket mounting bolt :
8 ~ 10 Nm (80 ~ 100 kg·cm, 5.6 ~ 6.9 lb·ft)
Installation is the reverse of removal.
Tighten the HECU mounting bolts and brake tube nuts to the specified torque.
Tightening torque
HECU mounting bolt :
8 ~ 10 Nm (80 ~ 100 kg·cm, 5.6 ~ 6.9 lb·ft)
Brake tube nut :
13 ~ 17 Nm (130 ~ 170 kg·cm, 9 ~ 12.5 lb·ft)
Raise the vehicle and release the parking brake.
Disconnect the HECU harness connector's and measure from the harness side connector.
Be sure to remove the connector's double lock and insert the probe into the harness side (back-probe). Inserting it into the terminal side may result in a bad connection.
Rotate the wheel to be measured approximately 1/2 to 1 rotation per second, and check the output voltage using a circuit tester or an oscilloscope.
Wheel speed sensor | Front left | Front right | Rear left | Rear right |
Terminal | 11 | 6 | 10 | 8 |
26 | 7 | 25 | 23 |
Output voltage when measuring with an oscilloscope ;
- Low : 0.525V (at 7mA)
- High : 1.05V (at 14mA)
