Nissan Tiida C11. Instruction — part 844
HAC-40
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
PTC HEATER CONTROL SYSTEM
19.
CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT TEMPERATURE SENSOR AND PTC CONTROL
UNIT
Check continuity between ambient temperature sensor harness con-
nector M60 (A) terminal 3 and PTC control unit harness connector
M84 (B) terminal 8.
Is the inspection result normal
YES
>> 1.
If equipped with instruction transmission, GO TO 20.
2.
If equipped with automatic transmission, GO TO 22.
NO
>> Repair harness or connector.
20.
CHECK ENGINE RPM SIGNAL (MANUAL TRANSMISSION)
1.
Reconnect PTC control unit.
2.
Start the engine.
3.
Check voltage between PTC control unit harness connector
M84 terminal 4 and ground.
Is the inspection result normal
YES
>> GO TO 22.
NO
>> GO TO 21.
21.
CHECK CONTINUITY OF ENGINE RPM CIRCUIT BETWEEN FRONT AIR CONNTROL AND PTC CON-
TROL UNIT (MANUAL TRANSMISSION)
1.
Turn ignition switch OFF.
2.
Disconnect ECM and PTC control unit connector.
3.
Check continuity between PTC control unit harness connector
M84 (A) terminal 4 and ECM harness connector F10 (B) termi-
nal 13.
4.
Check continuity between PTC control unit harness connector
M84 (A) terminal 4 and ground.
Is the inspection result normal
YES
>> Replace ECM. Refer to XX.
NO
>> Repair harness or connector.
22.
CHECK BCM INPUT (FAN ON) SIGNAL
A
B
Continuity
Connector
Terminal
Connector
Terminal
Ambient temperature
sensor: M64
3
PTC control unit:
M84
8
Yes
AWIIA0464ZZ
Terminals
Voltage
(Approx.)
(+)
(
−
)
Connector
Terminal
Ground
PTC control unit: M84
4
4.2V
SJIA0924E
A
B
Continuity
Connector
Terminal
Connector
Terminal
PTC control unit: M84
4
ECM: F10
13
Yes
A
Ground
Continuity
Connector
Terminal
PTC control unit: M84
4
No
SJIA0925E
PTC HEATER CONTROL SYSTEM
HAC-41
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
1.
Turn blower control dial to "1" position.
2.
Confirm fan on signal between PTC control unit harness con-
nector M84 terminal 11 and ground using oscilloscope.
Is the inspection result normal
YES
>> Replace PTC control unit.
NO
>> GO TO 23.
23.
CHECK CIRCUIT CONTINUITY BETWEEN BCM AND PTC CONTROL UNIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector and PTC control unit connector.
3.
Check continuity between BCM harness connector M19 (A) ter-
minal 50 and PTC control unit harness connector M84 (B) ter-
minal 11.
4.
Check continuity between PTC control unit harness connector
M84 (A) terminal 11 and ground.
Is the inspection result normal
YES
>> Replace BCM. Refer to XX.
NO
>> Repair harness or connector.
PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component Inspection
INFOID:0000000001674174
COMPONENT INSPECTION
Ambient Sensor
Terminals
Voltage
(Approx.)
(+)
(-)
Connector
Terminal
PTC control
unit: M84
11
Ground
AWIIA0460ZZ
ZJIA0583J
A
B
Continuity
Connector
Terminal
Connector
Terminal
BCM: M19
50
PTC control unit:
M84
11
Yes
A
Ground
Continuity
Connector
Terminal
PTC control unit: M84
11
No
AWIIA0461ZZ
HAC-42
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
PTC HEATER CONTROL SYSTEM
After disconnecting ambient sensor connector E60, measure resis-
tance between terminals 3 and 4 at sensor side, using the table
below.
If NG, replace ambient sensor. Refer to XX.
Water Temperature Sensor
After disconnecting water temperature sensor connector M64, mea-
sure resistance between terminals 1 and 2 at sensor side, using the
table below.
If NG, replace water temperature sensor. Refer to XX.
Full Hot Switch
Temperature
°
C (
°
F)
Resistance k
Ω
−
15 (5)
12.73
−
10 (14)
9.92
−
5 (23)
7.80
0 (32)
6.19
5 (41)
4.95
10 (50)
3.99
15 (59)
3.24
20 (68)
2.65
25 (77)
2.19
30 (86)
1.81
35 (95)
1.51
40 (104)
1.27
45 (113)
1.07
AWIIA0601ZZ
Temperature
°
C (
°
F)
Resistance k
Ω
−
20 (
−
4)
31.62
−
10 (14)
17.47
0 (32)
10.09
10 (50)
6.05
20 (68)
3.76
30 (86)
2.41
40 (104)
1.59
50 (122)
1.08
60 (140)
0.75
70 (158)
0.53
80 (176)
0.38
90 (194)
0.28
100 (212)
0.21
SJIA0929E
PTC HEATER CONTROL SYSTEM
HAC-43
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
After disconnecting full hot switch connector M65, check continuity
between terminals 1 and 2 at switch side.
If NG, replace full hot switch. Refer to XX.
PTC relay-1
Check continuity between terminal Nos. 3 and 5.
If NG, replace PTC relay-1. Refer to XX.
PTC HEATER (1500 WATT)
PTC HEATER (1500 WATT) : System Description
INFOID:0000000001682730
SYSTEM DESCRIPTION
The PTC heater system is controlled by ambient temperature, water temperature, FAN ON signal. Hot air is
supplied to a discharge air outlet by PTC heater that generates heat electrically even when engine coolant
temperature is low.
Component Parts
PTC heater system components are:
• PTC control unit
Connector
Terminals
Condition
Continuity
Full hot switch:
M65
1
2
Temperature control dial:
Full hot position
Yes
Temperature control dial:
Except full hot position
No
SJIA0930E
Condition
Continuity
12V direct current supply between terminal Nos. 1 and 2
Yes
No current supply
No
SJIA0931E
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