Check engine NISSAN TIIDA 2007 Service Repair Manual

PTC HEATER CONTROL SYSTEM
HAC-47
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
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6.CHECK POWER SUPPLY FOR PTC RELAY-3
Check voltage between PTC relay-3 harness connector E61 termi-
nals 2, 3, and ground.
Is the inspection result normal
YES >> GO TO 5.
NO >> Check power supply circuit and 80A fuse (P, located in the fuse block). Refer to XX-XX.
 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.
7.CHECK PTC RELAYS
1. Turn ignition switch OFF.
2. Check PTC relay. Refer to XX-XX, "*****"
.
Is the inspection result normal
YES >> GO TO 6.
NO >> Replace inoperative PTC relay.
8.CHECK PTC RELAY-1 GROUND CIRCUIT
1. Disconnect ambient sensor, and PTC heater connectors.
2. Turn temperature control dial clockwise until full hot position.
3. Turn mode control dial to foot position.
4. Start the engine (1,000 RPM minimum).
5. Turn blower control dial to low speed.
6. Check continuity between PTC relay-1 harness connector E61
terminal 1 and ground.
Is the inspection result normal
YES >> GO TO 10.
NO >> GO TO 9.
9.CHECK CIRCUIT CONTINUITY BETWEEN PTC RELAY-1 AND BCM
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check continuity between PTC relay-1 harness connector E61
(A) terminal 1 and BCM harness connector M19 (B) terminal 64.
Is the inspection result normal
YES >> Replace BCM. Refer to XXXX.
NO >> Repair harness or connector.
10.CHECK PTC RELAY-2 GROUND CIRCUIT
Te r m i n a l s
Vo l ta g e
(Approx.)
(+) (−)
Connector Terminal
Ground Battery voltage
PTC relay-3: E632
3
AWIIA0466ZZ
Connector Terminal
GroundContinuity
PTC relay-1: E61 1 Yes
AWIIA0455ZZ
AB
Continuity
Connector Terminal Connector Terminal
PTC relay-1: E61 1 BCM: M19 64 Yes
AWIIA0467ZZ

HAC-50
< COMPONENT DIAGNOSIS >[MANUAL AIR CONDITIONER]
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:0000000001682733
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

INSUFFICIENT COOLING
HAC-73
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
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INSUFFICIENT COOLING
Component Function CheckINFOID:0000000001547073
SYMPTOM: Insufficient cooling
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn temperature control dial counterclockwise to maximum cold position.
2. Check for cold air at discharge air outlets.
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to HAC-6, "
Operational Check".
Does another symptom exist?
YES >> Refer to HAC-5, "How to Perform Trouble Diagnosis For Quick and Accurate Repair".
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.CHECK COMPRESSOR DRIVE BELT TENSION
Check compressor belt tension. Refer to EM-15, "
Checking" (HR16DE) or EM-142, "Checking Drive Belts"
(MR18DE), or EM-263, "Inspection and Adjustment" (K9K).
OK or NG
OK >> GO TO 5.
NG >> Adjust or replace compressor belt. Refer to EM-15, "
Checking" (HR16DE) or EM-142, "Checking
Drive Belts" (MR18DE), or EM-263, "Inspection and Adjustment" (K9K)
5.CHECK AIR MIX DOOR CABLE
Check and verify air mix door cable operation. Refer to XXXX AIR MIX DOOR CABLE ADJUST.
Does air mix door operate correctly?
YES >> GO TO 6.
NO >> Repair or replace as necessary.
6.CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation. Refer to XX-XX, "*****".
Does cooling fan motor operate correctly?
YES >> GO TO 7.
NO >> Check cooling fan motor. Refer to XX-XX, "*****".
7.CHECK FOR EVAPORATOR FREEZE UP
Start engine and run A/C. Check for evaporator freeze up.
Does evaporator freeze up?
YES >> Perform performance test diagnoses. Refer to "PERFORMANCE TEST DIAGNOSIS".
NO >> GO TO 8.
8.CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to "Test Reading".
OK or NG
OK >> GO TO 9.
NG >> Perform performance test diagnoses. Refer to "PERFORMANCE TEST DIAGNOSIS".

HAC-78
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
INSUFFICIENT COOLING
High-pressure Side is Too High and Low-pressure Side is Too Low
High-pressure Side is Too Low and Low-pressure Side is Too High
Both High- and Low-pressure Sides are Too Low
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure
sides are too high.Pressure is reduced soon af-
ter water is splashed on con-
denser.Excessive refrigerant charge in refrig-
eration cycle.Reduce refrigerant until
specified pressure is ob-
tained.
Air suction by cooling fan is in-
sufficient.Insufficient condenser cooling perfor-
mance.
↓
1. Condenser fins are clogged.
2. Improper fan rotation of cooling
fan. Clean condenser.
 Check and repair cooling
fan if necessary.
 Low-pressure pipe is not
cold.
 When compressor is
stopped high-pressure val-
ue quickly drops by approx-
imately 196 kPa (1.96 bar, 2
kg/cm
2 , 28 psi). It then de-
creases gradually thereaf-
ter.Poor heat exchange in condenser
(After compressor operation stops,
high-pressure decreases too slowly.).
↓
Air in refrigeration cycle.Evacuate repeatedly and
recharge system.
Engine tends to overheat. Engine cooling systems malfunction.Check and repair each en-
gine cooling system.
 An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
 Plates are sometimes cov-
ered with frost. Excessive liquid refrigerant on low-
pressure side.
 Excessive refrigerant discharge
flow.
 Expansion valve is open a little
compared with the specification.
↓
Improper expansion valve adjust-
ment.Replace expansion valve.
AC359A
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too high
and low-pressure side is too low.
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.High-pressure tube or parts located
between compressor and condenser
are clogged or crushed. Check and repair or re-
place malfunctioning
parts.
 Check oil for contami-
nation.
AC360A
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low
and low-pressure side is too
high.High- and low-pressure sides
become equal soon after com-
pressor operation stops.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
No temperature difference be-
tween high- and low-pressure
sides.Compressor pressure operation
is improper.
↓
Damaged inside compressor
packings.Replace compressor.
AC356A

INSUFFICIENT HEATING
HAC-81
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
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INSUFFICIENT HEATING
Component Function CheckINFOID:0000000001547078
SYMPTOM: Insufficient heating
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE
1. Turn temperature control dial clockwise to maximum heat position.
2. Check for hot air at discharge air outlets.
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to HAC-6, "
Operational Check".
Does another symptom exist?
YES >> Refer to HAC-5, "How to Perform Trouble Diagnosis For Quick and Accurate Repair" .
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.CHECK COOLANT SYSTEM
1. Check engine coolant level. Refer to XX-XX, "*****" .
2. Check hoses for leaks or kinks.
3. Check Radiator cap. Refer to XX-XX, "*****" .
OK or NG
OK >> GO TO 5.
NG >> Repair/replace as necessary.
5.CHECK AIR MIX DOOR CABLE
Check air mix door cable operation. Refer to XXXX AIR MIX DOOR CABLE ADJUSTMENT .
OK or NG
YES >> GO TO 6.
NO >> Adjust or replace air mix door cable. Refer to XXXX AIR MIX DOOR CABLE ADJUST. .
6.CHECK AIR DUCTS
Check ducts for air leaks.
OK or NG
OK >> GO TO 7.
NG >> Repair air leaks.
7.CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses.
Is the inlet hose hot and the outlet hose warm?
YES >> GO TO 8.
NO >> Both hoses warm: GO TO 9.
8.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Check engine control temperature sensor. Refer to XX-XX, "*****" .
OK or NG
OK >> System OK.

HAC-82
< SYMPTOM DIAGNOSIS >[MANUAL AIR CONDITIONER]
INSUFFICIENT HEATING
NG >> Repair or replace as necessary. Retest.
9.CHECK HEATER HOSES
Check heater hoses for proper installation.
OK or NG
OK >> GO TO 10.
NG >> Repair /replace as necessary. Retest GO TO 7.
10.BACK FLUSH HEATER CORE
1. Back flush heater core.
2. Drain the water from the system.
3. Refill system with new engine coolant. Refer to XX-XX, "*****" .
4. Start engine and warm it up to normal operating temperature.
5. Touch both the inlet and outlet heater hoses.
Is the inlet hose hot and the outlet hose warm? YES or NO
YES >> System OK.
NO >> Replace heater core and refill engine coolant. Refer to XXXX .

INSPECTION AND ADJUSTMENT
HAC-87
< BASIC INSPECTION >[AUTO AIR CONDITIONER (W/O NAVI)]
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INSPECTION AND ADJUSTMENT
Operational CheckINFOID:0000000001547386
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Press temperature control switch (UP: ) until 32°C is displayed.
2. Press OFF switch.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for HAC-198, "
Memory Function Check".
If OK, continue the check.
CHECKING BLOWER
1. Press blower motor switch (UP: ). Blower should operate on low speed. The fan symbol should have one
blade lit.
2. Press blower motor switch (UP: ), and continue checking blower speed and fan symbol until all speeds
are checked.
3. Leave blower on max. speed.
If NG, go to trouble diagnosis procedure for HAC-120, "
Front Blower Motor Diagnosis Procedure".
If OK, continue the check.
CHECKING DISCHARGE AIR
1. Press MODE switch and DEF switch.
2. Each position indicator should change shape.
3. Confirm that discharge air comes out according to the air distribution table. Refer to HAC-94, "
Discharge
Air Flow".
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for HAC-109, "
Mode Door Motor Diagnosis Procedure".
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at
FRESH when the DEF is selected.
CHECKING RECIRCULATION
1. Press recirculation (REC) switch one time. Recirculation LED should illuminate.
2. Press fresh (FRE) switch one time. Fresh LED should illuminate.
3. Listen for intake door position change (you should hear blower sound change slightly).
If NG, go to trouble diagnosis procedure for HAC-116, "
Intake Door Motor Diagnosis Procedure".
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Press temperature control switch (UP: ) until 32°C is displayed.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for HAC-193, "
Component Function Check".
If OK, continue the check.
CHECKING TEMPERATURE DECREASE
1. Press temperature control switch (DOWN: ) until 18°C is displayed. Conditions : Engine running at usual operating temperature

SELF-DIAGNOSIS FUNCTION
HAC-99
< FUNCTION DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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CAUTION:
If battery voltage drops below 12V during diagnosis STEP-3, door motor speed becomes slower and
as a result, the system may generate an error even when operation is usual. To avoid this, start engine
before performing this diagnosis.
>> GO TO 2.
2.STEP-1: LED AND DISPLAY ARE CHECKED
Check display screen (1) and LED illumination (2).
OK or NG
OK >> GO TO 3.
NG >> Malfunction OFF switch or AUTO switch. Refer to HAC-
311, "Self-Diagnosis".
3.CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
Press temperature control switch (UP: ).
Advance to self
-diagnosis STEP-2?
YES >> GO TO 4.
NO >> Replace front air control (temperature control switch is malfunctioning). Refer to XX.
4.CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Press temperature control switch (DOWN: ).
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace front air control (temperature control switch is malfunctioning). Refer to XX.
5.STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Press temperature control switch (UP: ).
Does code No. 20 appear on the display?
YES >> GO TO 6.
NO >> GO TO 13.
6.STEP-3: AIR MIX DOOR AND MODE DOOR POSITIONS ARE CHECKED
Press temperature control switch (UP: ).
Does code No. 30 appear on the display?
YES >> GO TO 7.
NO >> GO TO 14.
AWIIA0285ZZ
SJIA0737E
SJIA0738E

MAGNET CLUTCH
HAC-125
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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6. RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to HAC-87, "
Operational Check".
Does another symptom exist?
YES >> Repair as necessary.
NO >> Replace front air control. Refer to XX.
Magnet Clutch Diagnosis ProcedureINFOID:0000000001547432
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.CHECK INTAKE SENSOR CIRCUIT
Refer to HAC-139, "
Intake Sensor Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Malfunctioning intake sensor: Refer to XX.
2.PERFORM AUTO ACTIVE TEST
Refer to XX-XX, "*****"
.
Does the magnet clutch operate?
YES >>  WITH CONSULT-III
GO TO 6.
 WITHOUT CONSULT-III
GO TO 7.
NO >> GO TO 3.
3.CHECK POWER SUPPLY FOR MAGNET CLUTCH
1. Turn ignition switch OFF.
2. Disconnect compressor connector F3.
3. Start the engine.
4. Press AUTO switch and A/C switch ON.
5. Check voltage between compressor harness connector F3 ter-
minal 1 and ground.
AWIIA0304GB
Te r m i n a l s
Voltag e
(Approx.) (+) (−)
Connector Terminal
Ground
Compressor: F3 1 12V
SJIA0743E

MAGNET CLUTCH
HAC-127
< COMPONENT DIAGNOSIS >[AUTO AIR CONDITIONER (W/O NAVI)]
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Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair harness or connector.
8.CHECK VOLTAGE FOR FRONT AIR CONTROL (COMPRESSOR ON SIGNAL)
1. Reconnect front air control harness connector M50 and BCM
harness connector M19.
2. Turn ignition switch ON.
3. Confirm compressor ON signal between front air control harness
connector M50 terminal 13 and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Replace front air control. Refer to XX.
9.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1. Start the engine.
2. Check the voltage of refrigerant pressure sensor. Refer to XX-XX, "*****"
.
WITHOUT CONSULT-III
1. Start the engine.
2. Check voltage between ECM harness connector F11 and
ground.
Is the inspection result normal?
YES >>  WITH CONSULT-III
GO TO 10.
 WITHOUT CONSULT-III
GO TO 11.
NO >> Refer to XX-XX, "*****"
.
10.CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to HAC-97, "
CONSULT-III Function (BCM)".
A
GroundContinuity
Connector Terminal
Front air control:
M5013 No
Te r m i n a l s
ConditionVo l ta g e
(Approx.) (+) (-)
Connector Terminal
Ground Front air
control:
M5013A/C switch:
ON
(Blower mo-
tor oper-
ates.)
AWIIA0486ZZ
ZJIA0584J
Te r m i n a l s
ConditionVo l ta g e
(Approx.) (+)
(-)
Connector Terminal
ECM: F1141 without
dieselGroundA/C switch: ON
(Blower motor
operates.)1-4V
78 with diesel
AWIIA0562ZZ