1. |
Disconnect the double lock connector (A) from
the HECU.

|
2. |
Disconnect the brake tubes from the
HECU.

•
|
Do not spill brake fluid on the
vehicle; it may damage the paint; if brake fluid gets on
the paint, wash it off immediately with
water. |
•
|
Take care not to damage or deform
the brake lines during removal and
installation. |
•
|
To prevent the brake fluid from
flowing, plug and cover the hose ends and joints with a
shop towel or equivalent
material. | | |
3. |
Remove the HECU bracket mounting bolts and
remove the HECU.
1. |
Never attempt to disassemble the
HECU. |
2. |
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
bolts: 17~26 Nm (170~260
kg•cm, 12.5~19.1
lb•ft)
|
| |
1. |
Installation is the reverse of
removal. |
2. |
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,
5.9~7.3 lb•ft) HECU bracket
mounting bolt: 17~26 Nm (170~260
kg•cm, 12.5~19.1 lb•ft) Brake tube
nut: 13~17 Nm (130~170 kg•cm,
9.5~12.5
lb•ft)
|
|
WHEEL SPEED SENSOR OUTPUT VOLTAGE CHECK
1. |
Raise the vehicle and release the parking
brake. |
2. |
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 itinto the terminal side may result in a bad
connection. | |
3. |
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 (ABS)
|
1
|
19
|
5
|
22
|
2
|
20
|
6
|
23
|
Terminal (ESC)
|
46
|
45
|
44
|
43
|
15
|
30
|
14
|
29
|
Output
voltage:
When measuring with
an oscilloscope:
130mV p•p or
more

|