Nissan Tiida C11. Manual - part 843

HAC-36

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

PTC HEATER CONTROL SYSTEM

NO

>> GO TO 4.

4.

CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC CONTROL UNIT

1.

Turn ignition switch OFF.

2.

Disconnect PTC control unit connector.

3.

Check continuity between PTC control unit harness connector
M84 (A) terminal 2 and PTC relay-1 harness connector E61 (B)
terminal 1.

Is the inspection result normal

YES

>> GO TO 5.

NO

>> GO TO 7.

5.

CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC HEATER

1.

Disconnect PTC heater connector.

2.

Check continuity between PTC relay-1 harness connector E61
(A) terminal 5 and PTC heater harness connector M66 (B) termi-
nal 1.

Is the inspection result normal

YES

>> GO TO 6.

NO

>> Repair harness or connector.

6.

CHECK PTC HEATER GROUND CIRCUIT

Check continuity between PTC heater harness connector M66 termi-
nal 2 and ground.

Is the inspection result normal

YES

>> Replace PTC heater. Refer to XX.

NO

>> Repair harness or connector.

7.

CHECK POWER SUPPLY VOLTAGE FOR PTC CONTROL UNIT

1.

Turn ignition switch ON. 

2.

Check voltage between PTC control unit harness connector
M84 terminal 1 and ground.

Is the inspection result normal

YES

>> GO TO 8.

A

B

Continuity

Connector

Terminal

Connector

Terminal

PTC control unit: M84

2

PTC relay-1: 

E61

1

Yes

AWIIA0456ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

PTC relay-1: 

E61

5

PTC heater: M66

1

Yes

SJIA0915E

Connector

Terminal

Ground

Continuity

PTC heater: 

M66

2

Yes

SJIA0916E

Terminals

Voltage

(Approx.)

(+)

(

−

)

Connector

Terminal

Ground

Battery voltage

PTC control unit: M84

1

SJIA0911E

PTC HEATER CONTROL SYSTEM

HAC-37

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NO

>> Repair harness or connector.

8.

CHECK GROUND CIRCUIT FOR PTC CONTROL UNIT 

1.

Turn ignition switch OFF.

2.

Check continuity between PTC control unit harness connector
M84 terminal 7 and ground.

Is the inspection result normal

YES

>> GO TO 9.

NO

>> Repair harness or connector.

9.

CHECK FULL HOT CIRCUIT BETWEEN PTC CONTROL UNIT AND GROUND

1.

Reconnect PTC control unit and PTC relay-1 connector.

2.

Turn ignition switch ON.

3.

Check voltage between full hot switch harness connector M65
terminal 1 and ground.

Is the inspection result normal

YES

>> GO TO 12.

NO

>> GO TO 10.

10.

CHECK CIRCUIT CONTINUITY BETWEEN FULL HOT SWITCH AND PTC CONTROL UNIT

1.

Turn ignition switch OFF.

2.

Disconnect full hot switch and PTC control unit connector.

3.

Check continuity between full hot switch harness connector M65
(A) terminal 1, 2 and PTC control unit harness connector M84
(B) terminal 3, 8.

4.

Check continuity between full hot switch harness connector M65 (A) terminal 1, 2 and ground.

Is the inspection result normal

YES

>> GO TO 11.

NO

>> Repair harness or connector.

11.

CHECK FULL HOT SWITCH

Connector

Terminal

Ground

Continuity

PTC control unit: M84

7

Yes

SJIA0912E

Terminals

Condition

Voltage

(Approx.)

(+)

(

−

)

Connector

Terminal

Ground

PTC control 

unit: M65

1

Temperature control dial: 
Full hot position.

0V

Temperature control dial: 
Except full hot position.

5V

AWIIA0457ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

Full hot switch: 

M65

1

PTC control unit: 

M84

3

Yes

2

8

(+)

(-)

Continuity

Connector

Terminal

Ground

Yes

Full hot switch: M65

1

2

AWIIA0458ZZ

HAC-38

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

PTC HEATER CONTROL SYSTEM

Check full hot switch. Refer to 

HAC-41, "PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component

Inspection"

.

Is the inspection result normal

YES

>> Replace the PTC control unit. Refer to XX.

NO

>> Replace full hot switch. Refer to XX.

12.

CHECK VOLTAGE BETWEEN WATER TEMPERATURE SENSOR AND GROUND

Check voltage between water temperature sensor harness connec-
tor M64 terminal 1 and ground.

Is the inspection result normal

YES

>> GO TO 14.

NO

>> GO TO 13.

13.

CHECK CIRCUIT CONTINUITY BETWEEN WATER TEMPERATURE SENSOR AND PTC CONTROL

UNIT

1.

Turn ignition switch OFF.

2.

Disconnect PTC control unit.

3.

Check continuity between water temperature sensor harness
connector M64 (A) terminal 1 and PTC control unit harness con-
nector M84 (B) terminal 9.

4.

Check continuity between water temperature sensor harness
connector M64 (A) terminal 1 and ground.

Is the inspection result normal

YES

>> Replace PTC control unit. Refer to XX.

NO

>> Repair harness or connector.

14.

CHECK WATER TEMPERATURE SENSOR

Refer to 

HAC-41, "PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component Inspection"

.

Is the inspection result normal

YES

>> GO TO 15.

NO

>> Replace water temperature sensor. Refer to XX.

15.

CHECK CIRCUIT CONTINUITY BETWEEN WATER TEMPERATURE SENSOR AND PTC CONTROL

UNIT

Terminals

Voltage

(Approx.)

(+)

(

−

)

Connector

Terminal

Ground

5V

Water temperature sensor: 

M64

1

SJIA0920E

A

B

Continuity

Connector

Terminal

Connector

Terminal

Water temperature 

sensor: M64

1

PTC control 

unit: M84

9

Yes

A

Continuity

Connector

Terminal

Water temperature sensor: M64

1

Ground

No

SJIA0921E

PTC HEATER CONTROL SYSTEM

HAC-39

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Check continuity between water temperature sensor harness con-
nector M64 (A) terminal 2 and PTC control unit harness connector
M84 (B) terminal 8.

Is the inspection result normal

YES

>> GO TO 16.

NO

>> Repair harness or connector.

16.

CHECK VOLTAGE BETWEEN AMBIENT TEMPERATURE SENSOR AND GROUND

1.

Reconnect PTC control unit connector.

2.

Turn ignition switch ON.

3.

Check voltage between ambient temperature sensor harness
connector M60 terminal 4 and ground.

Is the inspection result normal

YES

>> GO TO 18.

NO

>> GO TO 17.

17.

CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT TEMPERATURE SENSOR AND PTC CONTROL

UNIT

1.

Turn ignition switch OFF.

2.

Check continuity between ambient temperature sensor harness
connector M60 (A) terminal 4 and PTC control unit harness con-
nector M84 (B) terminal 10.

3.

Check continuity between ambient temperature sensor harness
connector E60 (A) terminal 4 and ground.

Is the inspection result normal

YES

>> Replace PTC control unit. Refer to XXXX.

NO

>> Repair harness or connector.

18.

CHECK AMBIENT TEMPERATURE SENSOR

Refer to 

HAC-245, "Ambient Sensor Component Inspection"

.

Is the inspection result normal

YES

>> GO TO 19.

NO

>> Replace ambient temperature sensor. Refer to XX.

A

B

Continuity

Connector

Terminal

Connector

Terminal

Water temperature 

sensor: M64

2

PTC control unit: 

M84

8

Yes

SJIA0923E

Terminals

Voltage

(Approx.)

(+)

(

−

)

Connector

Terminal

Ground

Ambient temperature sen-

sor: M60

4

5V

AWIIA0462ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

Ambient temperature 

sensor: E60

4

PTC control 

unit: M84

10

Yes

A

Ground

Continuity

Connector

Terminal

Ambient temperature sensor: E60

4

No

AWIIA0463ZZ