Diagnostic Steps:

Step 1

Check the defrost button.

FE11-6101b

(a)

Press the defrost button.

(b)

At the same time, test continuity between the air-conditioning
control module harness connector IP40 terminals No.28 and
the body ground with a multimeter.

Test Terminal

Test

Conditions

Continuity

IP40 28 - Body Ground

Release

10 kΩ or higher

IP40 28 - Body Ground

Press

Less than 1 Ω

Is the resistance specified value?

Yes

Go to step 3

No

Step 2

Replace the air-conditioning control panel.

(a)

Replace the air-conditioning control panel. Refer to

8.2.8.1

 

Air-conditioning Control Panel Replacement

.

Is the rearview mirror defrost function working correctly?

Yes

System normal

No

Step 3

Check the defrost request signal.

1

2

3

4

5

6

7

8

9 10

20

30

40

19

29

39

18

28

38

17

27

37

16

26

36

15

25

35

14

24

34

13

23

33

12

22

32

11

21

31

Body Control Module 1 Harness 
Connector IP29

FE11-6102b

(a)

Press the defrost button.

(b)

At the same time, test continuity between the BCM harness
connector IP29 terminal No.24 and the body ground with a
multimeter.

Test Terminal

Test

Conditions

Continuity

IP29 24 - Body Ground

Release

10 kΩ or higher

IP29 24 - Body Ground

Press

Less than 1 Ω

Is the resistance specified value?

Yes

Go to step 5

No

Step 4

Repair the defrost request signal open circuit.

(a)

Repair the open circuit.

Is the rearview mirror defrost function working correctly?

Body Electric

Defrosting

11-441

Yes

System normal

No

Step 5

Check the BCM defrost power output.

1

2

3

4

5

6

7

8

Body Control Module 3 Harness 
Connector IP27

FE11-6103b

(a)

Press the defrost button.

(b)

At the same time, measure the BCM harness connector IP27
terminal No.3 voltage with a multimeter.
Standard Voltage: 11-14 V
Is the rearview mirror defrost function working correctly?

Yes

Go to step 7

No

Step 6

Replace the BCM.

(a)

Replace the BCM. Refer to 

11.10.8.1

 

BCM Replacement

.

Is the rearview mirror defrost function working correctly?

Yes

System normal

No

Step 7

Check the fuse IF16.

IF14

IF2

IF1

IF5

IF7

IF3

IF16

IF27

IF25

IF26

IF28

IF30

IF24

IF20

IF19

IF23

IF18

IF21

IF13

IF12

IF15

IF9

IF10

IF8

F17

F22

M

FE11-6106b

(a)

Check whether the fuse IF16 is blown.

Fuse Rated Current: 10 A

No

Go to step 9

Yes

Step 8

Check the fuse IF16 circuit.

(a)

Check whether there is a short circuit.

(b)

Repair the circuits. Confirm that there are no short circuits.

11-442

Defrosting

Body Electric

(c)

Replace with fuses with rated current.

Is the rearview mirror defrost function working correctly?

Yes

System normal

No

Step 9

Check the rearview mirror defrost supply voltage.

Left Outside Rearview Mirror Harness 
Connector DR05

Right Outside Rearview Mirror Harness 
Connector DR15

FE11-6107b

(a)

Press the defrost button.

(b)

Measure the electric rearview mirror harness connector
DR05 (left) or DR15 (right) terminal E voltage with a
multimeter.
Standard Voltage: 11-14 V

Yes

Go to step 11

No

Step 10

Repair rearview mirror defrost power supply open circuit.

(a)

Repair the open circuit between the rearview mirror defroster
harness connector DR05 (left) or DR15 (right) terminal E and
the BCM harness connector IP27 terminal No.3.

Is the rearview mirror defrost function working correctly?

Step 11

Check the rearview mirror defrost ground circuit.

Left Outside Rearview Mirror Harness 
Connector DR05

Right Outside Rearview Mirror Harness 
Connector DR15

FE11-6108b

(a)

Disconnect the rearview mirror harness connector.

(b)

Measure resistance between the mirror harness connector
DR05 (left) or DR15 (right) terminal K and the ground with a
multimeter.
Resistance Standard Value: Less than 1 Ω

Yes

Go to step 13

No

Step 12

Repair the rearview mirror defrost ground circuit open.

(a)

Repair the open circuit.

Body Electric

Defrosting

11-443

Is the rearview mirror defrost function working correctly?

Yes

System normal

No

Step 13

Replace the rearview mirror glass.

(a)

Replace the rearview mirror glass. Refer to 

11.5.8.1

 

Outside

Rearview Mirror Replacement

.

Confirm the repair completed.

Next

Step 14

System normal.

11-444

Defrosting

Body Electric