2003 NISSAN TEANA check engine

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AT C
A/C CONTROLLER ................................................ 107
Removal and Installation of A/C and AV Switch ... 107
REMOVAL ......................................................... 107
INSTALLATION ................................................. 107
AUTO AMP ............................................................. 108
Removal and Installation of Unified Meter and A/C
Amp. ..................................................................... 108
REMOVAL ......................................................... 108
INSTALLATION ................................................. 108
AMBIENT SENSOR ................................................ 109
Removal and Installation ...................................... 109
REMOVAL ......................................................... 109
INSTALLATION ................................................. 109
IN-VEHICLE SENSOR .............................................110
Removal and Installation ....................................... 110
REMOVAL .......................................................... 110
INSTALLATION .................................................. 110
SUNLOAD SENSOR ............................................... 111
Removal and Installation ...................................... . 111
REMOVAL ......................................................... . 111
INSTALLATION ................................................. . 111
INTAKE SENSOR ....................................................112
Removal and Installation ....................................... 112
REMOVAL .......................................................... 112
INSTALLATION .................................................. 112
BLOWER UNIT ........................................................113
Removal and Installation ....................................... 113
REMOVAL .......................................................... 113
INSTALLATION .................................................. 113
Disassembly and Assembly .................................. 114
BLOWER MOTOR ...................................................115
Removal and Installation ....................................... 115
REMOVAL .......................................................... 115
INSTALLATION .................................................. 115
FAN CONTROL AMPLIFIER ...................................116
Removal and Installation ....................................... 116
REMOVAL .......................................................... 116
INSTALLATION .................................................. 116
INTAKE DOOR MOTOR ..........................................117
Removal and Installation ....................................... 117
REMOVAL .......................................................... 117
INSTALLATION .................................................. 117
AIR CONDITIONER FILTER ....................................118
Removal and Installation ....................................... 118
FUNCTION ......................................................... 118
REPLACEMENT TIMING ................................... 118
REPLACEMENT PROCEDURES ...................... 118
HEATER & COOLING UNIT ASSEMBLY ...............119
Removal and Installation ....................................... 119
REMOVAL .......................................................... 119
INSTALLATION ................................................. 120
Disassembly and Assembly ................................. 121
MODE DOOR MOTOR ........................................... 123
Removal and Installation ...................................... 123
REMOVAL ......................................................... 123
INSTALLATION ................................................. 123AIR MIX DOOR MOTOR .........................................124
Removal and Installation ......................................124
REMOVAL .........................................................124
INSTALLATION .................................................124
HEATER CORE .......................................................125
Removal and Installation ......................................125
REMOVAL .........................................................125
INSTALLATION .................................................125
DUCTS AND GRILLES ...........................................126
Removal and Installation ......................................126
REMOVAL .........................................................126
INSTALLATION .................................................130
REFRIGERANT LINES ...........................................131
HFC-134a (R-134a) Service Procedure ...............131
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ................................................................131
Components .........................................................133
QR ENGINE ......................................................133
VQ ENGINE ......................................................134
Removal and Installation of Compressor ..............134
REMOVAL .........................................................134
INSTALLATION .................................................136
Check Disc to Pulley Clearance ...........................136
Removal and Installation of Low-pressure Flexible
Hose and Low-pressure Pipe 1 ............................137
REMOVAL .........................................................137
INSTALLATION .................................................137
Removal and Installation of High-pressure Flexible
Hose .....................................................................138
REMOVAL .........................................................138
INSTALLATION .................................................138
Removal and Installation of High-pressure Pipe 1
(Engine Compartment) .........................................139
REMOVAL .........................................................139
INSTALLATION .................................................139
Removal and Installation of Low-pressure Pipe 2
and High-pressure Pipe 2 .....................................140
REMOVAL .........................................................140
INSTALLATION .................................................141
Removal and Installation of Condenser ................142
REMOVAL .........................................................142
INSTALLATION .................................................143
Removal and Installation of Liquid Tank ...............143
REMOVAL .........................................................143
INSTALLATION .................................................144
Removal and Installation of Refrigerant Pressure
Sensor ..................................................................144
REMOVAL .........................................................144
INSTALLATION .................................................144
Removal and Installation of Evaporator ................144
REMOVAL .........................................................144
INSTALLATION .................................................145
Removal and Installation of Expansion Valve .......145
REMOVAL .........................................................145
INSTALLATION .................................................145
Checking for Refrigerant Leaks ............................146
Checking System for Leaks Using the Fluorescent
Leak Detector .......................................................146

ATC-4 Dye Injection .........................................................146
Electrical Leak Detector ........................................147
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................147
CHECKING PROCEDURE ................................148
SERVICE DATA AND SPECIFICATIONS (SDS) ....150Compressor ..........................................................150
Lubricant ...............................................................150
Refrigerant ............................................................150
Engine Idling Speed ..............................................150
Belt Tension ..........................................................150

LUBRICANT
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LUBRICANTPFP:KLG00
Maintenance of Lubricant Quantity in CompressorBJS000FI
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage occurred. It is important to maintain the
specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:

Lack of lubricant: May lead to a seized compressor

Excessive lubricant: Inadequate cooling (thermal exchange interference)
LUBRICANT
LUBRICANT RETURN OPERATION
Adjust the lubricant quantity according to the test group shown below.
1. CHECK LUBRICANT RETURN OPERATION
Can lubricant return operation be performed?

A/C system works properly.

There is no evidence of a large amount of lubricant leakage.
CAUTION:
If excessive lubricant leakage is noted, never perform the lubricant return operation.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS
1. Start the engine, and set to the following conditions:
–Engine speed: Idling to 1,200 rpm
–A/C switch: ON
–Blower speed: Max. position
–Temp. control: Optional [Set so that intake air temperature is 25 to 30°C (77 to 86°F).]
–Intake position: Recirculation (REC)
2. Perform lubricant return operation for about 10 minutes.
3. Stop the engine.
>> GO TO 3.
3. CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO AT C - 2 2 , "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-
MENT" .
NO >> GO TO AT C - 2 2 , "
LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-
MENT EXCEPT COMPRESSOR" . Name : NISSAN A/C System Oil Type S

TROUBLE DIAGNOSIS
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FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSIS MODE
1. Turn ignition switch ON.
2. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press A/C switch for at least 5 seconds.
CAUTION:

Press A/C switch after indicating LED of intake switch.

If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower
and as a result, the system may generate an error even when operation is normal. To avoid this,
start engine before performing this diagnosis.

Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis func-
tion.
>> GO TO 2.
2. STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Does code No. 20 appear on the display?
YES >> GO TO 3.
NO >> GO TO 13.
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3
Press temperature control switch (UP, driver side).
Advance to self
-diagnosis STEP-3?
YES >> GO TO 4.
NO >> Replace A/C and AV switch. (Temperature control switch is malfunctioning.)
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2
Press temperature control switch (DOWN, driver side).
Return to self
-diagnosis STEP-2?
YES >> GO TO 5.
NO >> Malfunctioning A/C and AV switch or unified meter and A/C amp. Refer to AT C - 9 4 , "
Self-diagno-
sis" .
5. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
Press temperature control switch (UP, driver side).
Does code No. 30 appear on the display?
YES >> GO TO 6.
NO >> GO TO 14.
RHA970DB
RHA869DD

ATC-54
TROUBLE DIAGNOSIS

Operational CheckBJS000FY
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Press temperature control switch (UP, driver side) until 32°C is displayed.
2. Press fan control switch (DOWN) at least 2 seconds.
3. Turn ignition switch OFF.
4. Turn ignition switch ON.
5. Press AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press fan control switch (DOWN) at least 2 seconds.
If NG, go to trouble diagnosis procedure for AT C - 9 5 , "
Memory Function" .
If OK, continue the check.
CHECKING BLOWER
1. Press fan control switch (UP). Blower should operate on low speed. The fan symbol should have one
blade lit.
2. Press fan control switch (UP) again, 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 AT C - 7 2 , "
Blower Motor Circuit" .
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 distri-
bution table. Refer to AT C - 3 1 , "
Discharge Air Flow" .
If NG, go to trouble diagnosis procedure for AT C - 6 3 , "
Mode Door
Motor Circuit" .
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 INTAKE AIR
1. Press intake switch. Recirculation indicator should illuminate.
2. Press intake switch again. Fresh indicator should illuminate.
3. Listen for intake door position change (Slight change of blower sound can be heard.).
If NG, go to trouble diagnosis procedure for AT C - 6 9 , "
Intake Door Motor Circuit" .
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 TEMPERATURE DECREASE
1. Press temperature control switch (DOWN, driver side) until 18°C is displayed.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for AT C - 8 4 , "
Insufficient Cooling" .
If OK, continue the check.Conditions : Engine running at normal operating temperature
SJIA1002E

ATC-72
TROUBLE DIAGNOSIS

Blower Motor CircuitBJS000G5
SYMPTOM: Blower motor operation is malfunctioning.
INSPECTION FLOW
*1AT C - 5 4 , "Operational Check"*2ATC-105, "Intake Sensor Circuit"*3AT C - 4 7 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2.
*4AT C - 4 7 , "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 6.*5ATC-47, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.*6AT C - 7 4 , "
DIAGNOSIS PROCE-
DURE FOR BLOWER MOTOR"
*7AT C - 3 5 , "SYMPTOM TABLE"*8ATC-96, "Ambient Sensor Circuit"*9AT C - 9 9 , "In-vehicle Sensor Circuit"
*10ATC-102, "Sunload Sensor Circuit"*11EC-131, "DTC P0117, P0118 ECT
SENSOR" (QR engine) or EC-474,
"DTC P0117, P0118 ECT SEN-
SOR" (VQ engine)
RJIA3261E

TROUBLE DIAGNOSIS
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7. CHECK VOLTAGE FOR UNIFIED METER AND A/C AMP. (COMPRESSOR ON SIGNAL)
1. Reconnect BCM connector and unified meter and A/C amp.
connector.
2. Turn ignition switch ON.
3. Check voltage between unified meter and A/C amp. harness
connector M45 terminal 42 and ground.
OK or NG
OK >> GO TO 8.
NG-1 >> If the voltage is approx. 5 V when A/C switch is ON: Replace unified meter and A/C amp.
NG-2 >> If the voltage is approx. 0 V when A/C switch is OFF: Replace BCM.
8. CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-II
1. Start the engine.
2. Check voltage of refrigerant pressure sensor. Refer to EC-90,
"CONSULT-II Reference Value in Data Monitor Mode" (QR
engine) or EC-434, "
CONSULT-II Reference Value in Data Mon-
itor Mode" (VQ engine).
WITHOUT CONSULT-II
1. Start the engine.
2. Check voltage between ECM harness connector F101 terminal
70 and ground.
OK or NG
OK >>
WITH CONSULT-II: GO TO 9.

WITHOUT CONSULT-II: GO TO 10.
NG >> Refer to EC-339, "
REFRIGERANT PRESSURE SENSOR" (QR engine) or EC-748, "REFRIGER-
ANT PRESSURE SENSOR" (VQ engine).
Te r m i n a l s
Condition Voltage (+)
(-) Unified meter
and A/C amp.
connectorTerminal
No.
M45 42 GroundA/C switch: ON
(Blower motor oper-
ates.)Approx. 0 V
OFF switch: ON (A/C
System: OFF)Approx. 5 V
RJIA2007E
Terminals
Condition Voltage (+)
(-)
ECM con-
nectorTerminal No.
F10169 (QR engine)
GroundA/C switch: ON
(Blower motor
operates.)Approx. 1.0 - 4.0 V
70 (VQ engine)
SJIA1723E

TROUBLE DIAGNOSIS
ATC-83
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12. CHECK CAN COMMUNICATION
Check CAN communication. Refer to BCS-14, "
CAN Communication Inspection Using CONSULT-II (Self-
Diagnosis)" .

BCM – ECM

ECM – IPDM E/R

ECM – Unified meter and A/C amp.
OK or NG
OK >> Replace ECM.
NG >> Repair or replace malfunctioning part(s).
COMPONENT INSPECTION
Refrigerant Pressure Sensor
The refrigerant pressure sensor is attached to the condenser.
Make sure that the A/C refrigerant pressure and the sensor output
voltage are as shown in the A/C operating condition figure. Refer to
EC-339, "
REFRIGERANT PRESSURE SENSOR" (QR engine) or
EC-748, "
REFRIGERANT PRESSURE SENSOR" (VQ engine).
RJIA1795E
RJIA2954E