Isuzu Rodeo UE. Manual - part 583

8D–180

WIRING SYSTEM

Parts Location

D08RX077

Legend

(1) I–17
(2) RR Defogger Switch & Mirror Defogger Switch
(3) H–33
(4) D–12
(5) H–19
(6) H–21
(7) Luggage Room Light
(8) H–20
(9) G–9

(10) G–10, G–11

(11) G–12

(12) B–6
(13) B–8
(14) PCM
(15) Relay and Fuse Box
(16) H–31
(17) I–39 (Rear Defogger & Mirror Defogger Relay)
(18) H–28
(19) D–3

8D–181

WIRING SYSTEM

Diagnosis

Rear Defogger Does Not Operate

Step

Action

Value(s)

Yes

No

1

Are the fuse 9, 10 and 17 normal?

—

Go to Step 2

Replace the

fuse(s)

2

Are B–6 and/or B–8 grounded securely?

—

Go to Step 3

Ground it

(them)

securely

3

Remove the rear defogger relay.

Is the battery voltage applied between the rear
defogger relay harness side connector I–39 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 I–39 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 I–39 terminal 4 and the ground?

Approx. 12V

Go to Step 7

Go to Step 6

6

Repair an open circuit between the fuse 17 and
connector I–39 terminal 4.

Is the action complete?

—

Go to Step 5

—

7

Disconnect the PCM connector C–1, C–2 and C–3.

Is there continuity between harness side connector
I–39 terminal 3 and harness side connector C–2
treminal C12 or connector C–1 terminal A14?

—

Go to Step 11

Go to Step 8

8

Repair an open circuit between connector I–39
terminal 3 and connector C–2 terminal C12 or
connector C–1 terminal A14.

Is the action complete?

—

Go to Step 7

—

9

Is there continuity between harness side connector
I–17 terminal 4 and connector C–3 terminal F9 or
connector C–3 terminal E12?

—

Go to Step 11

Go to Step 10

10

Repair an open circuit between connector I–17
terminal 4 and connector C–3 terminal F9 or connector
C–3 terminal E12.

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 C–2

terminal C12 or connector C–1 terminal A14.

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

—

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

8D–182

WIRING SYSTEM

Step

No

Yes

Value(s)

Action

15

Repair an open circuit between connector G–12
terminal 1 and the ground B–6.

Is the action complete?

—

Go to Step 14

—

16

1. Reconnect the rear defogger switch connector

I–17.

2. Turn the rear defogger switch on.

Is the battery voltage applied between the PCM
harness side connector C–3 terminal F9 or connector
C–3 terminal E12 and the ground?

Approx. 12V

Go to Step 17

Replace the

rear defogger

switch.

17

1. Reconnect the PCM connector C–2 and C–3 or

C–1.

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?

—

Go to Step 19

Go to Step 18

18

Replace the PCM.

Is the action complete?

—

Verify repair

—

19

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

Is the action complete?

—

Verify repair

—

8D–183

WIRING SYSTEM

Rear Defogger Timer Does Not Function

Step

Action

Value(s)

Yes

No

1

Replace the PCM.

Is the action complete?

—

Verify repair

—