1998 OPEL FRONTERA Workshop Manual

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Page 4401 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–51 BRAKE CONTROL SYSTEM
Chart B-18 RL Speed Sensor Disconnection (DTC 53)
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Measure the resistance between EHCU connector ter

Page 4402 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–52
BRAKE CONTROL SYSTEM
Chart B-20 FL Speed Sensor Short Circuit (DTC 61)
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector
3. Measure the FL speed sensor resistance betwe

Page 4403 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–53 BRAKE CONTROL SYSTEM
Chart B-21 FR Speed Sensor Short Circuit (DTC 62)
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Measure the FR speed sensor resistance betw

Page 4404 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–54
BRAKE CONTROL SYSTEM
Chart B-22 RL Speed Sensor Short Circuit (DTC 63)
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector
3. Measure the RL speed sensor resistance betwe

Page 4405 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–55 BRAKE CONTROL SYSTEM
Chart B-23 RR Speed Sensor Short Circuit (DTC 64)
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Measure the RR speed sensor resistance betw

Page 4406 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–56
BRAKE CONTROL SYSTEM
Chart B-24 Sensor Signal Input Abnormality (DTC 65)
StepActionYe sNo
1Using TECH 2?Go to Step 2Go to Step 3
21. Connect TECH 2.
2. Select Snap shot manual trigger.
3. With

Page 4407 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–57 BRAKE CONTROL SYSTEM
Unit Inspection Procedure
This section describes the following inspection
procedures referred to during “SYMPTOM DIAGNOSIS”
and “DIAGNOSIS BY ‘ABS’ WARN

Page 4408 of 6000

OPEL FRONTERA 1998 Workshop Manual 5A–58
BRAKE CONTROL SYSTEM
Chart C-1-2 FR Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Jack up the vehicle with all four wheels

5A–58
BRAKE CONTROL SYSTEM
Chart C-1-2 FR Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Jack up the vehicle with all four wheels off the ground.
Measure the AC voltage between EHCU connector terminals
while turning FR wheel at a speed of 1 RPS:
Is voltage between EHCU connector terminals 4 and 5 under 200
mV?
Go to Step 2
Ok.
Go to Step 3
21. Disconnect the wheel speed sensor.
2. Measure resistance between the wheel speed sensor
connector terminals 1 and 2.
Is resistance between connector (C-41) terminals 1 and 2 within
1.3k - 1.9k ohms?Connector is
faulty, or open or
short circuit of
harness between
wheel speed
sensor connector
and EHCU.
Inspect and
correct the
connector or
harness
Go to Step 3
Wheel speed
sensor is faulty.
Replace the
wheel speed
sensor.
Go to Step 3
3Reconnect all components and ensure all components are
properly mounted.
Was this step finished?Repeat the “Basic
diagnostic flow
chart.”
Go to Step 3
Chart C-1-3 RL Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect EHCU connector.
3. Jack up the vehicle with all four wheels off the ground.
Measure the AC voltage between EHCU connector terminals
while turning RL wheel at a speed of 1 RPS:
Is voltage between EHCU connector terminals 22 and 23 under
200 mV?
Go to Step 2
Ok.
Go to Step 3
21. Disconnect the wheel speed sensor.
2. Measure resistance between the wheel speed sensor
connector terminals 1 and 2.
Is resistance between connector (F-3) terminals 1 and 2 within
1.3k - 1.9k ohms?Connector is
faulty, or open or
short circuit of
harness between
wheel speed
sensor connector
and EHCU.
Inspect and
correct the
connector or
harness
Go to Step 3
Wheel speed
sensor is faulty.
Replace the
wheel speed
sensor.
Go to Step 3
3Reconnect all components and ensure all components are
properly mounted.
Was this step finished?Repeat the “Basic
diagnostic flow
chart.”
Go to Step 3

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