Opel Frontera UBS. Manual - part 713

8D–282

WIRING SYSTEM

DTC 1–3 Mechanical Defect

STEP

ACTION

VALUE(S)

YES

NO

1. Turn the starter switch off.
2. Disconnect the actuator connector C–37.
3. Connect the battery positive terminal with the actuator side

connector terminal 3 and the battery negative terminal with
terminal 4.

Does the control plate move by hand?

Connect the battery positive terminal with the actuator side
connector terminal 1 and 3, and the battery negative terminal
with terminal 2 and 4.
Does the control plate move to full open side?

Connect the battery positive terminal with the actuator side
connector terminal 2 and 3, and the battery negative terminal
with terminal 1 and 4.
Does the control plate move to full close side?

Is there continuity between harness side connector C–37
terminal 1 and connector B–9 terminal 7, connector C–37
terminal 2 and connector B–9 terminal 15?

–

–

–

–

Replace
the
actuator

Go to
step 3

Go to
step 4

Replace
the control
unit

Go to
step 2

Replace
the
actuator

Replace
the
actuator

Repair or
replace
harness

1

2

3

4

WIRING SYSTEM

8D–283

DTC 1–4 Open Side of Motor System Continuously Energizing

STEP

ACTION

VALUE(S)

YES

NO

1. Turn the starter switch off.
2. Disconnect the actuator connector C–37.
3. Measure resistance between actuator side connector

terminal 1 and 2.

NOTE: If control plate position is fully opened or fully
closed, resistance can not be measured.
Is there resistance within range specified in the value(s)
column?

Is there continuity between harness side connector C–37
terminal 1 and connector B–9 terminal 7, harness side
connector C–37 terminal 2 and connector B–9 terminal 15?

More than 4.2

Ω

–

Go to
step 2

Replace
the control
unit

Replace
the
actuator

Repair or
replace
harness

1

2

8D–284

WIRING SYSTEM

Anti-lock Brake System (ABS)

General Description

The circuit consists of EHCU (Electronic Hydraulic
Control Unit), wheel speed sensor, G–sensor,
stoplight switch or brake switch (w/cruise control),
backup light switch, transmission switch–1, 2,
indicator light and data link connector.
EHCU controls brake fluid pressure applied to front
and rear wheels to prevent wheels from locking by
using speed sensor and G–sensor signals.
Based on wheel speed signals from speed sensor,
EHCU activates solenoid valves incorporated into
the control unit to increase, maintain or decrease
brake fluid pressure.
Refer to Anti–lock Brake System in Brakes section.

WIRING SYSTEM

8D–285

Circuit Diagram (RHD)-1

2.0

Y/G

2.0

W/G

3.0

W/G

0.5
LG

FL-6 40A
ABS

F-9 20A
ABS

INDICATOR
LIGHT(METER)

BRAKE
SW

STOP
LIGHT
SW

ELECTRONIC
HYDRAULIC
CONTROL UNIT

4WD CONTROL

UNIT(19)

14

C-4

13

C-4

3.0

B/Y

3.0

B/Y

0.85

L/W

0.5

L/W

0.5

L/W

2.0

B

C-4 10A
ELEC.IGN.

STARTER SW

(IG1)

STARTER SW

(IG1)

C-10 10A
METER,GAUGE

I-9

I-10

15

6

I-9

2

H-26

H-16

19

H-27

18

16

5.0

W

0.85
G/W

C-14 15A
STOP,A/T CONT.

BATT.(+)

BATT.(+)

STOP LIGHT

10

C-4

3

0.85
G/W

(W/CRUISE CONTROL)

0.85
G/W

0.85

G/Y

0.85

G/Y

0.85

G/Y

0.85

G/Y

B-13

1

B-13

4

B-14

H-13

1

B-14

2

G-
SENSOR

26

C-4

0.5

L/W

0.5

Y/B

0.5

Y/B

B-25

2

B-25

1

H-15

1

8

C-4

6

C-39

FENDER-RH

H-13

1

C-4

15

16

C-4

0.5

L/Y

0.5

L/Y

0.5

Y

0.5

Y

A

2.0

B

(DIESEL)

5

C-39

FENDER-RH

C-4

15

2.0

B

C-85

ENG.ROOM-FRT

C-4

GROUND

GROUND

GROUND

BATTERY

BATTERY

G-SENSOR

POWER

SUPPLY

SILA

BRAKE LIGHT

SWITCH

12

4WD

ABS

D08RW601