Nissan Tiida C11. Manual - part 898

 

  Главная      Nissan     Nissan Tiida C11 - Service Manual

 

поиск по сайту            

 

 

 

 

 

 

 

 

 

содержание   ..  896  897  898  899   ..

 

 

Nissan Tiida C11. Manual - part 898

 

 

HAC-256

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

PTC HEATER CONTROL SYSTEM

PTC HEATER CONTROL SYSTEM

PTC HEATER (300 WATT)

PTC HEATER (300 WATT) : PTC Heater System Description

INFOID:0000000001548105

SYSTEM DESCRIPTION

The PTC heater system is controlled by ambient temperature, water temperature, FAN ON signal and temper-
ature control dial. Hot air is supplied to the discharge air outlets by a PTC heater that generates heat electri-
cally even when engine coolant temperature is low.

Component Parts

PTC heater system components are:

• PTC control unit
• PTC heater
• PTC relay-1
• Water temperature sensor
• Full hot switch
• Ambient sensor

System Operation

PTC heater system starts when all the following conditions are met:
• Less than 35 minutes after ignition switch ON.
• Blower control dial ON (Blower motor operates.) and temperature control dial full hot position (Full hot switch

ON).

• Ambient temperature is lower than 0

°

C (32

°

).

• Engine coolant temperature is lower than 65

°

C (149

°

) (condition

1), or when it becomes lower than 60

°

C (140

°

) again (condition 2)

on startup.

• Engine speed is more than 1100 rpm and after a lapse of more

than 10 seconds.

PTC heater system stops when any of the following conditions is
met:
• More than 35 minutes later after ignition switch ON.
• Blower control dial OFF (Blower motor OFF) and/or temperature

control dial except full hot position (Full hot switch OFF).

• Ambient temperature is higher than 0

°

C (32

°

).

• Engine coolant temperature is higher than 65

°

C (149

°

).

• When engine speed becomes less than 800 rpm.

SJIA0968E

AWIIA0343GB

PTC HEATER CONTROL SYSTEM

HAC-257

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

PTC HEATER (300 WATT) : PTC Heater Component Description

INFOID:0000000001548106

COMPONENT DESCRIPTION

PTC Control Unit

The PTC control unit is attached on the A/C unit assembly. It controls
PTC heater by ambient temperature, water temperature, FAN ON
signal and temperature control dial.

PTC Heater

The PTC heater is attached on the A/C unit assembly. It generates
heat electrically.

Water Temperature Sensor

The water temperature sensor is attached on heater pipe. It detects
water temperature and converts it into a resistance value which is
then input in to PTC control unit.

Full Hot Switch

The full hot switch is attached on the A/C unit assembly. When the
temperature control dial at full hot position, then full hot switch is
turned ON.

Ambient Sensor

SJIA0906E

SJIA0907E

SJIA0908E

SJIA0909E

HAC-258

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

PTC HEATER CONTROL SYSTEM

The ambient sensor is attached on the radiator core support upper. It
detects ambient temperature and converts it into a resistance value
which is then input into the front air control.

PTC HEATER (300 WATT) : PTC Heater (300 Watt) Diagnosis Procedure

INFOID:0000000001548107

DIAGNOSTIC PROCEDURE FOR PTC SYSTEM

SYMPTOM: PTC heater system operation is malfunction.

1.

CHECK POWER SUPPLY FOR PTC RELAY-1

1.

Turn ignition switch ON.

2.

Check voltage between PTC relay-1 harness connector E61 ter-
minals 2, 3, and ground.

Is the inspection result normal

YES

>> GO TO 2.

NO

>>

Check power supply circuit and 10A fuse (No. 2) and 40A fusible link (No. I), located in the fuse
and fusible link box.

• If fuses are OK, check harness for open circuit. Repair or replace if necessary.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.

2.

CHECK PTC RELAY-1

1.

Turn ignition switch OFF.

2.

Check PTC relay-1. Refer to 

HAC-265, "PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component

Inspection"

.

Is the inspection result normal

YES

>> GO TO 3.

NO

>> Replace PTC relay-1. Refer to XX.

3.

CHECK PTC RELAY-1 OUTPUT CIRCUIT

1.

Disconnect ambient sensor, PTC heater and water temperature
sensor connectors.

2.

Turn temperature control dial clockwise until full hot position.

3.

Turn mode control dial to foot position.

4.

Start the engine.

5.

Turn blower control dial to maximum speed.

6.

Check continuity between PTC relay-1 harness connector E61
terminal 1 and ground.

Is the inspection result normal

YES

>> GO TO 5.

AWIIA0600ZZ

Terminals

Voltage

(Approx.)

(+)

(

)

Connector

Terminal

Ground

Battery voltage

PTC relay-1: E61

2

3

SJIA0913E

Connector

Terminal

Ground

Continuity

PTC relay-1: E61

1

Yes

AWIIA0455ZZ

PTC HEATER CONTROL SYSTEM

HAC-259

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

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

 

 

 

 

 

 

 

содержание   ..  896  897  898  899   ..