Page 3593 of 5883
![NISSAN TIIDA 2007 Service Repair Manual HAC-260
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
NO >> Repair harness or connector.
8.CHECK GROUND CIRCUIT FOR PTC CONTROL UNIT
1. Turn ignition switch OFF.
2. NISSAN TIIDA 2007 Service Repair Manual HAC-260
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
NO >> Repair harness or connector.
8.CHECK GROUND CIRCUIT FOR PTC CONTROL UNIT
1. Turn ignition switch OFF.
2.](/manual-img/5/57395/w960_57395-3592.png)
HAC-260
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
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
GroundContinuity
PTC control unit: M84 7 Yes
SJIA0912E
Te r m i n a l s
ConditionVo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
Full hot switch:
M651Temperature control dial:
Full hot position.0V
Temperature control dial:
Except full hot position.5V
AWIIA0457ZZ
AB
Continuity
Connector Terminal Connector Terminal
Full hot switch:
M651
PTC control unit:
M843
Ye s
28
(+) (-) Continuity
Connector Terminal
Ground Yes
Full hot switch: M651
2
AWIIA0458ZZ
Page 3594 of 5883
![NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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Check full hot switch. Refer to HAC-265, "PTC HEATER (300 WATT) : PTC Heater ( NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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Check full hot switch. Refer to HAC-265, "PTC HEATER (300 WATT) : PTC Heater (](/manual-img/5/57395/w960_57395-3593.png)
PTC HEATER CONTROL SYSTEM
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Check full hot switch. Refer to HAC-265, "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-265, "
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
Te r m i n a l s
Vol tag e
(Approx.)
(+) (−)
Connector Terminal
Ground 5V
Water temperature sensor:
M641
SJIA0920E
AB
Continuity
Connector Terminal Connector Terminal
Water temperature
sensor: M641PTC control
unit: M849Yes
A
Continuity
Connector Terminal
Water temperature sensor: M64 1 Ground No
SJIA0921E
Page 3595 of 5883
![NISSAN TIIDA 2007 Service Repair Manual HAC-262
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
Check continuity between water temperature sensor harness con-
nector M64 (A) terminal 2 and PTC control unit h NISSAN TIIDA 2007 Service Repair Manual HAC-262
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
Check continuity between water temperature sensor harness con-
nector M64 (A) terminal 2 and PTC control unit h](/manual-img/5/57395/w960_57395-3594.png)
HAC-262
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
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 PTC CONTROL UNIT AND GROUND
1. Turn ignition switch ON.
2. Check voltage between PTC heater harness connector M84 ter-
minal 10 and ground.
Is the inspection result normal
YES >> 1. If equipped with manual transmission, GO TO 22.
2. If equipped with automatic transmission, GO TO 24.
NO >> GO TO 17.
17.CHECK CIRCUIT CONTINUITY BETWEEN PTC CONTROL UNIT AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control and PTC control unit connector.
3. Check continuity between PTC control unit harness connector
M84 (A) terminal 10 and front air control harness connector M85
(B) terminal 30.
4. Check continuity between PTC control unit harness connector
M84 (A) terminal 10 and ground.
Is the inspection result normal
YES >> GO TO 18.
NO >> Repair harness or connector.
18.CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
AB
Continuity
Connector Terminal Connector Terminal
Water temperature
sensor: M642PTC control unit:
M848Yes
SJIA0923E
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (−)
Connector Terminal
Ground 5V
PTC control unit: M84 10
AWIIA0521ZZ
AB
Continuity
Connector Terminal Connector Terminal
PTC control unit: M84 10Front air control:
M8530 Yes
A
GroundContinuity
Connector Terminal
PTC control unit: M84 10 No
AWIIA0522ZZ
Page 3596 of 5883
![NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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1. Turn ignition switch OFF.
2. Disconnect ambient sensor connector E60.
3. Tu NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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1. Turn ignition switch OFF.
2. Disconnect ambient sensor connector E60.
3. Tu](/manual-img/5/57395/w960_57395-3595.png)
PTC HEATER CONTROL SYSTEM
HAC-263
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1. Turn ignition switch OFF.
2. Disconnect ambient sensor connector E60.
3. Turn ignition switch ON.
4. Check voltage between ambient sensor harness connector E60
terminal 2 and ground.
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 21.
19.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M86.
3. Check continuity between ambient sensor harness connector
E60 (A) terminal 1 and front air control harness connector M85
(B) terminal 10.
Is the inspection result normal?
YES >> GO TO 20.
NO >> Repair harness or connector.
20.CHECK AMBIENT SENSOR
Refer to HAC-265, "
PTC HEATER (300 WATT) : PTC Heater (300 Watt) Component Inspection".
Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> 1. Replace ambient sensor. Refer to XX.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
21.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M86.
3. Check continuity between ambient sensor harness connector
E60 (A) terminal 2 and front air control harness connector M86
(B) terminal 3.
4. Check continuity between ambient sensor harness connector
E34 (A) terminal 2 and ground.
Te r m i n a l s
Vol tag e
(Approx.) (+) (−)
Connector Terminal
Ground
Ambient sensor:
E6025V
AWIIA0307ZZ
AB
Continuity
Connector Terminal Connector Terminal
Ambient sensor:
E601Front air control:
M8610 Yes
AWIIA0558ZZ
AB
Continuity
Connector Terminal Connector Terminal
Ambient sensor:
E602Front air control:
M863Yes
AWIIA0559ZZ
Page 3597 of 5883
![NISSAN TIIDA 2007 Service Repair Manual HAC-264
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC- NISSAN TIIDA 2007 Service Repair Manual HAC-264
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-](/manual-img/5/57395/w960_57395-3596.png)
HAC-264
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
Is the inspection result normal?
YES >> 1. Replace front air control. Refer to XX.
2. Go to self-diagnosis HAC-213, "
Front Air Control Self-Diagnosis" and perform self-diagnosis
STEP-2. Confirm that code No. 20 is displayed.
NO >> Repair harness or connector.
22.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 24.
NO >> GO TO 23.
23.CHECK CONTINUITY OF ENGINE RPM CIRCUIT BETWEEN FRONT AIR CONTROL 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.
24.CHECK BCM INPUT (FAN ON) SIGNAL
A
GroundContinuity
Connector Terminal
Ambient sensor:
E602No
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
PTC control unit: M84 4 4.2V
SJIA0924E
AB
Continuity
Connector Terminal Connector Terminal
PTC control unit: M84 4 ECM: F10 13 Yes
A
GroundContinuity
Connector Terminal
PTC control unit: M84 4 No
SJIA0925E
Page 3598 of 5883
![NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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1. Turn blower control dial to "1" position.
2. Confirm fan on signal between NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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1. Turn blower control dial to "1" position.
2. Confirm fan on signal between](/manual-img/5/57395/w960_57395-3597.png)
PTC HEATER CONTROL SYSTEM
HAC-265
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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 25.
25.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:0000000001548108
COMPONENT INSPECTION
Ambient Sensor
Te r m i n a l s
Vo l ta g e
(Approx.) (+)
(-)
Connector Terminal
PTC control
unit: M8411 Ground
AWIIA0460ZZ
ZJIA0583J
AB
Continuity
Connector Terminal Connector Terminal
BCM: M19 50PTC control unit:
M8411 Ye s
A
GroundContinuity
Connector Terminal
PTC control unit: M84 11 No
AWIIA0461ZZ
Page 3599 of 5883
HAC-266
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/NAVI)]
PTC HEATER CONTROL SYSTEM
After disconnecting ambient sensor (1) connector E60, measure
resistance between terminals 1 and 2 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.
Full Hot Switch
Temperature °C (°F) Resistance kΩ
−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
AWIIA0603ZZ
Temperature °C (°F) Resistance kΩ
−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
Page 3600 of 5883
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HAC-267
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between te NISSAN TIIDA 2007 Service Repair Manual PTC HEATER CONTROL SYSTEM
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PTC HEATER CONTROL SYSTEM
HAC-267
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After disconnecting full hot switch connector M65, check continuity
between terminals 1 and 2 at switch side.
If NG, replace full hot switch.
PTC relay
Check continuity between terminal Nos. 3 and 5.
If NG, replace PTC relay.
PTC HEATER (1500 WATT)
PTC HEATER (1500 WATT) : System DescriptionINFOID:0000000001679705
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
Terminals Condition Continuity
12Temperature control dial: Full hot
positionYe s
Temperature control dial: Except full
hot positionNo
SJIA0930E
Condition Continuity
12V direct current supply between terminal Nos. 1 and 2 Yes
No current supply No
SJIA0931E