NISSAN TIIDA 2007 Service Repair Manual

HAC-158
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
Check continuity between PTC relay-2 harness connector E62 termi-
nal 1 and ground.
Is the inspection result normal
YES >> GO TO 12.
NO >> GO TO 11.
11 .CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-2 AND BCM
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector M19 (B) ter-
minal 52 and PTC relay-1 harness connector E62 (A) terminal 1.
Is the inspection result normal
YES >> Replace BCM. Refer to XXXX.
NO >> Repair harness or connector.
12.CHECK PTC RELAY-3 GROUND CIRCUIT
Check continuity between PTC relay-3 harness connector E63 termi-
nal 1 and ground.
Is the inspection result normal
YES >> GO TO 14.
NO >> GO TO 13.
13.CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-3 AND BCM
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between BCM harness connector M19 (B) ter-
minal 51 and PTC relay-3 harness connector E63 (A) terminal 1.
Is the inspection result normal
YES >> GO TO 14.
NO >> Repair harness or connector.
14.CHECK VOLTAGE BETWEEN AMBIENT TEMPERATURE SENSOR AND GROUND
Connector Terminal
GroundContinuity
PTC relay-2: E62 1 Yes
AWIIA0455ZZ
AB
Continuity
Connector Terminal Connector Terminal
PTC relay-2: E62 1 BCM: M19 52 Yes
AWIIA0468ZZ
Connector Terminal
GroundContinuity
PTC relay-3: E63 1 Yes
AWIIA0455ZZ
AB
Continuity
Connector Terminal Connector Terminal
PTC relay-3: E63 1 BCM: M19 51 Yes
AWIIA0469ZZ

PTC HEATER CONTROL SYSTEM
HAC-159
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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1. Turn ignition switch OFF.
2. Reconnect BCM connector.
3. Disconnect ambient temperature sensor.
4. Turn ignition switch ON.
5. Check voltage between ambient temperature sensor harness
connector E60 terminal 4 and ground.
Is the inspection result normal
YES >> GO TO 16.
NO >> GO TO 15.
15.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT TEMPERATURE SENSOR AND BCM CONTROL
UNIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between ambient temperature sensor harness
connector E60 (A) terminal 4 and BCM harness connector M18
(B) terminal 36.
4. Check continuity between ambient temperature sensor harness
connector E60 (A) terminal 4 and ground.
Is the inspection result normal
YES >> Replace BCM. Refer to XXXX.
NO >> Repair harness or connector.
16.CHECK CONTINUITY OF AMBIENT TEMPERATURE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between ambient temperature sensor harness
connector E60 (A) terminal 3 and BCM harness connector M18
(B) terminal 35.
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair harness or connector.
17.CHECK AMBIENT TEMPERATURE SENSOR
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
Ambient temperature sensor:
E6045V
AWIIA0462ZZ
AB
Continuity
Connector Terminal Connector Terminal
Ambient temperature
sensor: E604BCM: M1836Yes
A
GroundContinuity
Connector Terminal
Ambient temperature sensor: E60 4 No
AWIIA0470ZZ
AB
Continuity
Connector Terminal Connector Terminal
Ambient temperature
sensor: E643BCM: M1835Yes
AWIIA0471ZZ

HAC-160
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
Refer to XX-XX, "*****".
Is the inspection result normal?
YES >> GO TO 18.
NO >> Replace ambient temperature sensor. Refer to XX.
18.CHECK PTC HEATER RELAY-1 POWER SUPPLY CIRCUIT
1. Disconnect PTC heater connector.
2. Reconnect all PTC relays.
3. Start the engine (1,000 RPM minimum).
4. Check voltage between PTC heater harness connector E65 ter-
minal 3 and ground.
Is the inspection result normal?
YES >> GO TO 19.
NO >> Repair harness or connector.
19.CHECK PTC HEATER RELAY-2 POWER SUPPLY CIRCUIT
Check voltage between PTC heater harness connector E65 terminal
2 and ground.
Is the inspection result normal
YES >> GO TO 20.
NO >> Repair harness or connector.
20.CHECK PTC HEATER RELAY-3 POWER SUPPLY CIRCUIT
Check voltage between PTC heater harness connector E65 terminal
1 and ground.
Is the inspection result normal
YES >> Replace PTC heater. Refer to XXXX.
NO >> Repair harness or connector.
PTC HEATER (1500 WATT) : PTC Heater (1500 Watt) Component Inspection
INFOID:0000000001682726
COMPONENT INSPECTION
Blower Relay
Te r m i n a l s
Vol tag e
(Approx.) (+) (−)
Connector Terminal
Ground
PTC heater: E65 3 Battery voltage
AWIIA0472ZZ
Te r m i n a l s
Vol tag e
(Approx.) (+) (−)
Connector Terminal
Ground
PTC heater: E65 2 Battery voltage
AWIIA0474ZZ
Te r m i n a l s
Vol tag e
(Approx.) (+) (−)
Connector Terminal
Ground
PTC heater: E65 1 Battery voltage
AWIIA0476ZZ

PTC HEATER CONTROL SYSTEM
HAC-161
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Check continuity between relay terminals 3 and 5.
If NG, replace the blower relay. Refer to XX.
PTC relay
Check continuity between terminal Nos. 3 and 5.
If NG, replace PTC relay. Refer to XX.
Ambient Sensor
After disconnecting ambient sensor connector E60, measure resis-
tance between terminals 3 and 4 at sensor side, using the table
below.
Condition Continuity
12V direct current supply between terminals 1 and 2 Yes
OFF No
SCIA1245E
Condition Continuity
12V direct current supply between terminal Nos. 1 and 2 Yes
No current supply No
SJIA0931E
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
AWIIA0601ZZ

HAC-162
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
PTC HEATER CONTROL SYSTEM
If NG, replace ambient sensor. Refer to XX.

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
HAC-163
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
Component DescriptionINFOID:0000000001547446
COMPONENT DESCRIPTION
Front Air Control
The front air control has a built-in microcomputer which processes information sent from various sensors
needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower
motor and compressor are then controlled.
The front air control is unitized with control mechanisms. Signal from various switches and Potentio Tempera-
ture Control (PTC) are directly entered into front air control.
Self-diagnostic functions are also built into front air control to provide quick check of malfunctions in the auto
air conditioner system.
Potentio Temperature Control (PTC)
The PTC is built into the front air control. It can be set at an interval of 1°C (34°F) in the 18°C (64°F) to 32°C
(90°F) temperature range by turning temperature control switch. The set temperature is displayed.
Front Air Control Component Function CheckINFOID:0000000001547447
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE
1. Press the AUTO switch and A/C switch.
2. Display should indicate AUTO. Confirm that the compressor clutch engages (sound or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)
Can a symptom be duplicated?
YES >> GO TO 2.
NO >> Perform a complete operational check. Refer to HAC-87, "
Operational Check".
2.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 3.
3.CHECK POWER AND GROUND CIRCUIT
Check main power supply and ground circuit. Refer to HAC-163, "
Front Air Control Power and Ground Diag-
nosis Procedure".
Is the inspection result normal?
YES >> System OK.
NO >> Replace Front air control. Refer to XX.
Front Air Control Power and Ground Diagnosis ProcedureINFOID:0000000001547448
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
AWIIA0289GB

HAC-164
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER
1.CHECK POWER SUPPLY CIRCUIT FOR FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M50.
3. Check voltage between front air control harness connector M50
terminal 1, 7, 17 and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Check 10A fuses [Nos. 2, 13 and 16, located in the fuse block (J/B)].
 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 GROUND CIRCUIT FOR FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Check continuity between front air control harness connector
M50 terminal 10 and ground.
Is the inspection result normal?
YES >> Replace front air control. Refer to XX.
NO >> Repair or replace harness.
Terminals Ignition switch position
(+)
(-) OFF ACC ON
Connector Terminal
Front air control:
M501
GroundBattery
voltageBattery
voltageBattery
voltage
7Approx.
0VApprox.
0VBattery
voltage
17Approx.
0VApprox.
0VBattery
voltage
SJIA0786E
Connector Terminal
GroundContinuity
Front air control:
M5010 Yes
SJIA0787E

AIR CONDITIONER CONTROL
HAC-165
< ECU DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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ECU DIAGNOSIS
AIR CONDITIONER CONTROL
Front Air Control Terminals Reference ValuesINFOID:0000000001547449
Measure voltage between each terminal and ground by following terminals and reference value for front air
control.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR FRONT AIR CONTROL
AWIIA0502ZZ
Te r m i n a l
No.Wire
colorItemIgnition
switchConditionVo l ta g e
(V)
1 LG Power supply for BAT OFF-
Battery voltage
3RPower supply for intake door
PBR (5V output)ON - Approx. 5
4BREngine coolant temperature
sensor signalONAt idle (after warming up, ap-
prox. 80°C)
CAUTION:
The wave forms vary de-
pending on coolant tempera-
ture.
5 B Illumination ground ON - Approx. 0
7 R Power supply for IGN 2 OFF - Battery voltage
9 V PTC Heater ON/OFF signal ON Full Hot switch ON Approx. 12
10 B Ground ON - Approx. 0
12 P Blower motor ON signal ON FAN speed: 1st step (manual)
13 O Compressor ON signal ONA/C switch: ON
(Blower motor operates.)
SKIB3651J
ZJIA0583J
ZJIA0584J

HAC-166
< ECU DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
AIR CONDITIONER CONTROL
14 WRear window defogger ON
signalONWhen rear window defogger
switch is depressed.Approx. 0
When rear window defogger
switch is released.Approx. 5
15 GR Blower PWM ONBlower motor speed: 1st step
(manual)
16 GR Illumination signal ONLight switch: ON Approx. 12
Light switch: OFF Approx. 0
17 O Power supply for IGN 1 ON - Battery voltage
19 BR
Air mix door motor drive sig-
nalONImmediately after temperature
adjustment switch operation 20 G
21 LG
22 R
23 GR
Mode door motor drive signal ONImmediately after mode switch
operation 24 W
25 Y
26 V
27 GIntake door motor drive sig-
nalONREC or
FRE switchREC→FRE Approx. 0
FRE→REC Approx. 12
28 LG In-vehicle sensor - - -
29 O Intake sensor - - -
30 SB Ambient sensor - - -
31 P Sunload sensor - - -
32 RRear window defogger feed-
back signalONRear window defogger: ON Approx. 12
Rear window defogger: OFF Approx. 0
33 BR Sensor ground ON - Approx. 0
34 L Gas sensor signal ON - Approx. 0.5 - 5
35 SBIntake door motor feedback
signalONREC position Approx. 5
FRE position Approx. 0
36 VIntake door motor drive sig-
nalONREC or
FRE switchREC→FRE Approx. 12
FRE→REC Approx. 0 Te r m i n a l
No.Wire
colorItemIgnition
switchConditionVoltag e
(V)
ZJIA0863J
HAK0627D
HAK0627D

AIR CONDITIONER CONTROL
HAC-167
< ECU DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Wiring Diagram - Air Conditioner Control -INFOID:0000000001547450
ALIWA0036GB