Opel Frontera UE. Manual - part 1681

8D–154

WIRING SYSTEM

Parts Location

D08RY00834

Legend

(1) H–6
(2) E–21, E–22
(3) I–7
(4) H–14, H–19, H–32
(5) Relay & Fuse Box
(6) D–3
(7) H–28
(8) Luggege Room Light
(9) B–11

(10) H–21

(11) H–20

(12) G–9
(13) G–2
(14) B–8
(15) B–6
(16) H–31
(17) H–33
(18) D–12

SECTION

8D–155

WIRING SYSTEM

Diagnosis

Rear Defogger Does Not Operate

Step

Action

Value(s)

Yes

No

1

Are the fuse C–9, C–10 and C–16 normal?

—

Go to Step 2

Replace the

fuse(s)

2

Is B–8 grounded securely?

—

Go to Step 3

Ground it

securely

3

Remove the rear defogger relay.

Is the battery voltage applied between the rear
defogger relay harness side connector X–18 terminal 2
and the ground?

Approx. 12V

Go to Step 5

Go to Step 4

4

Repair an open circuit between the battery and
connector X–18 terminal 2.

Is the action complete?

—

Go to Step 3

—

5

Turn the starter switch on.

Is the battery voltage applied between harness side
connector X–18 terminal 4 and the ground?

Approx. 12V

Go to Step 7

Go to Step 6

6

Repair an open circuit between the fuse C–16 and
connector X–18 terminal 4.

Is the action complete?

—

Go to Step 5

—

7

Disconnect the PCM connector E–21, E–22.

Is there continuity between harness side connector
X–18 terminal 3 and harness side connector E–22
terminal 44 (S44)?

—

Go to Step 9

Go to Step 8

8

Repair an open circuit between connector X–18
terminal 3 and connector E–22 terminal 44 (S–44).

Is the action complete?

—

Go to Step 7

—

9

Is there continuity between harness side connector
I–17 terminal 4 and connector E–22 terminal 21 (S21)?

—

Go to Step 11

Go to Step 10

10

Repair an open circuit between connector I–17
terminal 4 and connector E–22 terminal 21 (S21).

Is the action complete?

—

Go to Step 9

—

11

Is there continuity between harness side connector
I–17 terminal 3 and the ground?

—

Go to Step 13

Go to Step 12

12

Repair an open circuit between connector I–17
terminal 3 and the ground B–8.

Is the action complete?

—

Go to Step 11

—

13

1. Reconnect the rear defogger relay.
2. Ground the PCM harness side connector E–22

terminal 44 (S44).

Is the battery voltage applied between the rear
defogger harness side connector G–9 terminal 1 and
the ground?

Approx. 12V

Go to Step 14

Repair an

open circuit

between the

fuse C–9 or

C–10 and the
rear defogger

14

Is there continuity between the rear defogger harness
side connector G–12 terminal 1 and the ground?

—

Go to Step 16

Go to Step 15

15

Repair an open circuit between connector G–12
terminal 1 and the ground B–8.

Is the action complete?

—

Go to Step 14

—

SECTION

8D–156

WIRING SYSTEM

Step

No

Yes

Value(s)

Action

16

1. Reconnect the PCM connector E–21 and E–22.
2. Turn the rear defogger switch on.

Is the battery voltage applied between the rear
defogger harness side connector G–9 terminal 1 and
the ground?

Approx. 12V

Go to Step 18

Go to Step 17

17

Replace the PCM.

Is the action complete?

—

Verify repair

–

18

Repair broken heat wire or connector poor contact of
the rear defogger.

Is the action complete?

—

Verify repair

—

SECTION

8D–157

WIRING SYSTEM

Rear Defogger Timer Does Not Function

Step

Action

Value(s)

Yes

No

1

Replace the PCM.

Is the action complete?

—

Verify repair

—

SECTION