Opel Frontera UBS. Service 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
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