Nissan Qashqai (2007-2010). Manual - part 951

HAC-164

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

PTC HEATER

Check 30A fuse (Nos 37, located in the fuse, fusible link and relay box). Refer to 

PG-111, "Fuse and Fusible

Link Arrangement"

.

Is the inspection result normal?

YES

>> Repair harness or connector.

NO

>> Replace fuse.

7.

CHECK PTC RELAY-1

Check PTC relay-1. Refer to 

HAC-76, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace PTC relay-1.

8.

CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND PTC HEATER

Check continuity between PTC relay-1 harness connector E53 terminal 5 and PTC heater harness connector
E117 terminal 3.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair harness or connector.

9.

CHECK POWER SUPPLY FOR PTC RELAY-1

1.

Turn ignition switch ON.

2.

Check voltage between PTC relay-1 harness connector E53 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 10.

10.

CHECK FUSE

Check 10A fuse [Nos 17, located in the fuse block (J/B)]. Refer to 

PG-110, "Fuse, Connector and Terminal

Arrangement"

.

Is the inspection result normal?

YES

>> Repair harness or connector.

NO

>> Replace fuse.

11.

CHECK CIRCUIT CONTINUIT BETWEEN PTC RELAY-1 AND IPDM E/R

Check continuity between PTC relay-1 harness connector E53 terminal 2 and IPDM E/R harness connector
E11 terminal 11.

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair harness or connector.

12.

CHECK VOLTAGE FOR PTC RELAY-2

PTC relay-1

PTC heater

Continuity

 Connector

Terminal

 Connector

Terminal

E53

5

E117

3

Continuity should exist

(+)

(

−

)

Voltage

PTC relay-1

—

 Connector

Terminal

E53

1

Ground

Battery voltage

PTC relay-1

IPDM E/R

Continuity

 Connector

Terminal

 Connector

Terminal

E53

2

E11

11

Continuity should exist

PTC HEATER

HAC-165

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1.

Turn ignition switch OFF.

2.

Disconnect PTC relay-2.

3.

Turn ignition switch ON.

4.

Check voltage between PTC relay-2 harness connector E54 terminal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 13.

13.

CHECK FUSE

Check 30A fuse (Nos 35, located in the fuse, fusible link and relay box). Refer to 

PG-111, "Fuse and Fusible

Link Arrangement"

.

Is the inspection result normal?

YES

>> Repair harness or connector.

NO

>> Replace fuse.

14.

CHECK PTC RELAY-2

Check PTC relay-2. Refer to 

HAC-76, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace PTC relay-2.

15.

CHECK CIRCUIT CONTINUIT BETWEEN PTC RELAY-2 AND PTC HEATER

Check continuity between PTC relay-2 harness connector E54 terminal 5 and PTC heater harness connector
E117 terminal 4.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Repair harness or connector.

16.

CHECK POWER SUPPLY FOR PTC RELAY-2

1.

Turn ignition switch ON.

2.

Check voltage between PTC relay-2 harness connector E54 terminal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> GO TO 10.

17.

CHECK CIRCUIT CONTINUIT BETWEEN PTC RELAY-2 AND IPDM E/R

Check continuity between PTC relay-2 harness connector E54 terminal 2 and IPDM E/R harness connector
E11 terminal 12.

(+)

(

−

)

Voltage

PTC relay-2

—

 Connector

Terminal

E54

3

Ground

Battery voltage

PTC relay-2

PTC heater

Continuity

 Connector

Terminal

 Connector

Terminal

E54

5

E117

4

Continuity should exist.

(+)

(

−

)

Voltage

PTC relay-2

—

 Connector

Terminal

E54

1

Ground

Battery voltage

HAC-166

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

PTC HEATER

Is the inspection result normal?

YES

>> GO TO 18.

NO

>> Repair harness or connector.

18.

CHECK BCM INPUT (FAN ON) SIGNAL

Check FAN ON/OFF signal in “DATA MONITOR”. Refer to 

HAC-140, "AIR CONDITIONER : CONSULT-III

Function (BCM - MANUAL AIR CONDITIONER)"

.

Is the inspection result normal?

YES

>> GO TO 21.

NO

>> GO TO 19.

19.

CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND BCM

1.

Turn ignition switch OFF.

2.

Disconnect heater control panel connector and BCM harness connector.

3.

Check continuity between heater control panel harness connector M54 terminal 8 and BCM harness con-
nector M65 terminal 15.

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> Repair harness or connector.

20.

CHECK FAN ON SIGNAL

1.

Reconnect heater control panel connector.

2.

Turn ignition switch ON.

3.

Check voltage between heater control panel harness connector M54 terminal 8 and ground.

4.

Turn fan control dial clockwise

5.

Check voltage between heater control panel harness connector M54 terminal 8 and ground.

Is the inspection result normal?

YES

>> GO TO 21.

NO

>> Replace heater control panel.

PTC relay-1

IPDM E/R

Continuity

 Connector

Terminal

 Connector

Terminal

E54

2

E11

12

Continuity should exist.

FAN SW ON

: FAN ON SIG ON

FAN SW OFF

: FAN ON SIG OFF

Heater control panel

BCM

Continuity

Connector

Terminal

Connector

Terminal

M54

8

M65

15

Continuity should exist

(+)

(

−

)

Voltage

Heater control panel

—

Connector

Terminal

M54

8

Ground

Battery voltage

(+)

(

−

)

Condition

Voltage

Heater control panel

—

Connector

Terminal

M54

8

Ground

Fan control dial: except 

OFF

Approx. 0

PTC HEATER

HAC-167

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

21.

CHECK CIRCUIT CONTINUITY BETWEEN FAN SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect fan switch connector.

3.

Check continuity between fan switch harness connector M88 terminal 6 and 5.

4.

Turn fan control dial clockwise.

5.

Check continuity between fan switch harness connector M88 terminal 6 and 5.

Is the inspection result normal?

YES

>> GO TO 22.

NO

>> Replace heater control panel.

22.

CHECK GROUND CIRCUIT FOR FAN SWITCH

Check continuity between fan switch harness connector M88 terminal 5 and ground.

Is the inspection result normal?

YES

>> GO TO 23.

NO

>> Repair harness or connector.

23.

CHECK CAN COMMUNICATION

Check CAN communication. Refer to 

LAN-59, "CAN Communication Signal Chart"

.

• BCM – IPDM E/R
• BCM  –  ECM

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace malfunctioning part(s).

Component Inspection

INFOID:0000000001096710

PTC HEATER

The PTC heater (1) is attached to the A/C unit assembly.
It generates heat electrically.

PTC RELAY

FAN SW

Condition

Continuity

Connector

Terminal

Connector

Terminal

M88

6

M88

5

Fan control dial: OFF

Continuity should not exist

FAN SW

Condition

Continuity

Connector

Terminal

Connector

Terminal

M88

6

M88

5

Fan control dial: except 

OFF

Continuity should exist

FAN SW

—

Continuity

Connector

Terminal

M88

5

Ground

Continuity should exist

JPIIA0033ZZ