How to Know the Symptoms of Air Conditioning?How to Know the Symptoms of Air Conditioning?

 

Model: Any Hyundai Cars

Year of Model: Any

Fuel: Gasoline

Displacement: Any

How to Know the Symptoms of Air Conditioning?

 

Heating,Ventilation, Air Conditioning

Study Guide and Troubleshooting Problem Symptoms Table Study Before replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor. Study Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts. Study After correcting the malfunction, check the complete system to ensure that performance is satisfactory.

Symptom Suspect Area No blower operation 1.       Blower fuse 2. Study Blower relay 3. Study Blower motor 4. Study  Power mosfet 5. Study Blower speed control switch 6. Study Wire harness No air temperature control 1.       Engine coolant capacity 2. Study   Heater control assembly No compressor operation 1.       Refrigerant capacity 2. Study  A/C Fuse 3. Study   Magnetic clutch 4. Study   Compressor 5. Study  A/C pressure transducer 6. Study   A/C switch 7. Study   Evaporator temperature sensor 8. Study  Wire harness No cool comes out 1.       Refrigerant capacity 2. Study  Refrigerant pressure 3. Study Drive belt. 4. Study  Magnetic clutch. 5. Study Compressor 6.  Study A/C pressure transducer 7.  Study  Evaporator temperature sensor. 8.  Study A/C switch. 9.  Study  Heater control assembly 10. Study Wire harness Insufficient cooling 1.       Refrigerant capacity 2.  Study  Drive belt 3.  Study  Magnetic clutch 4.  Study  Compressor 5.  Study Condenser 6.  Study  Expansion valve 7.  Study Evaporator 8.  Study  Refrigerant lines 9.  Study A/C pressure transducer 10. Study Heater control assembly No engine idle-up when A/C switch ON 1.       Engine ECM 2. Stud Wire harness No air inlet control 1.       Heater control assembly No mode control 1.       Heater control assembly 2. Study Mode actuator No cooling fan operation 1.       Cooling fan fuse 2. Study Fan motor 3. Study  Engine ECM 4. Study Wire harness

How to check the battery when weak

Study Battery Diagnosis test 1 

Study  INSPECTION

BATTERY DIAGNOSTIC TEST (1)

Study CHECKING FLOW

Study LOAD TEST

1Study .Perform the following steps to complete the load test procedure for maintenance free batteries.

2.Study Connect the load tester clamps to the terminals and proceed with the test as follow:

(1)Study If the battery has been on charge, remove the surface charge by connect a 300ampere load for 15 seconds.

(2)Study Connect the voltmeter and apply the specified load.

(3)Study Read the voltage after the load has been applied for 15 seconds.

(4)Study Disconnect the load.

(5)Study Compare the voltage reading with the minimum and replace the battery if battery test voltage is below that shown in the voltage table.

Study Voltage
Study Temperature

Voltage           9.6V
Temperature     20°C (68.0°F) and above

Voltage           9.5V
Temperature    16°C (60.8°F)

Voltage           9.4V
Temperature    10°C (50.0°F)

Voltage           9.3V
Temperature    4°C (39.2°F)

Voltage           9.1V
Temperature    -1°C (30.2°F)

Voltage           8.9V
Temperature    -7°C (19.4°F)

Voltage           8.7V
Temperature    -12°C (10.4°F)

Voltage           8.5V
Temperature    -18°C (-0.4°F)

NOTICE

-Study If the voltage is greater shown in the table, the battery is good.

-Study If the voltage is less than shown in the table, replace the battery.

STUDY BATTERY DIAGNOSTIC TEST (2)

1.Study Make sure the ignition switch and all accessories are in the OFF position.

2.Study Disconnect the battery cables (negative first).

3.Study Remove the battery from the vehicle.

STUDY CAUTION

Study Care should be taken in the event the battery case is cracked or leaking, to protect your skin from the electrolyte.

Study Heavy rubber gloves (not the household type) should be wore when removing the battery.

4.Study Inspect the battery tray for damage caused by the loss of electrolyte. If acid damage is present, it will be necessary to clean the area with a solution of clean warm water and baking soda. Scrub the area with a stiff brush and wipe off with a cloth moistened with baking soda and water.

5.Study Clean the top of the battery with the same solution as described above.

6.Study Inspect the battery case and cover for cracks. If cracks are present, the battery must be replaced.

7.Study Clean the battery posts with a suitable battery post tool.

8.Study Clean the inside surface of the terminal clamps with a suitable battery cleaning tool. Replace damaged or frayed cables and broken terminal clamps.

9.Study Install the battery in the vehicle.

10Study .Connect the cable terminals to the battery post, making sure tops of the terminals are flush with the tops of the posts.

11.Study Tighten the terminal nuts securely.

12.Study Coat all connections with light mineral grease after tightening.

CAUTION

Study When batteries are being charged, an explosive gas forms beneath the cover of each cell. Do not smoke near batteries being charged or which have recently been charged. Do not break live circuit at the terminals of batteries being charged.

A spark will occur when the circuit is broken. Keep open flames away form battery.

 

MORE INFO AND STUDY DON’T FORGET TO LEAVE COMMENTS

 

Study,Study,Study,Study,Study,Study,Study,Study,Study,Study,Study,Study,Study,Study

How to check ESP(Electronic Stability Program)

2009 > G 3.3 DOHC > Brake System

ESP circuit DIAGRAM(1)

ESP circuit DIAGRAM(2)

ESP circuit DIAGRAM(3)

ESP HECU CONNECTOR INPUT / OUTPUT

Connector Terminal
Specifications
Conditions

No
Description

1
Ground(Pump)
Current range : Min-10 A
Max-20 ~ 39 A
Always

4
Ground(Valve,ECU)
Current range : Min-2.5 A
Max-5 ~ 15 A
Always

2
Supply voltage(Pump)
Battery voltage
Always

3
Supply voltage(Valve)

26
Wheel sensor voltage(FL)
Battery voltage
IG ON

9
Wheel sensor voltage(FR)

6
Wheel sensor voltage(RL)

8
Wheel sensor voltage(RR)

5
Wheel sensor signal(FL)
Voltage(High) : 0.89~1.26 V
Voltage(Low) : 0.44~0.63 V
RUNNING

10
Wheel sensor signal(FR)

27
Wheel sensor signal(RL)

29
Wheel sensor signal(RR)

11
Diagnosis Input/oupput
Voltage(High) : 0.8 * IG ON more
Voltage(Low) : 0.2 * IG ON lower
HI-SCAN Communication

28
Ignition
Battery voltage
KEY ON/OFF

31
ESP Passive switch
Voltage(High) : 0.6 * IG ON more
Voltage(Low) : 0.4 * IG ON lower
Switch ON/OFF

36
Hand brake switch
Voltage(High) : 0.7 * IG ON more
Voltage(Low) : 0.3 * IG ON lower
Switch ON/OFF

37
Yaw Rate Sensor Test
Voltage(High) : 4.1 V more
Voltage(Low) : 1 V lower
IG ON

18
Yaw Rate Sensor Reference
2.464 V ~ 2.536 V
IG ON

16
Yaw Rate Sensor Signal
Offset voltage :2.5 V
range : 0.35 V ~ 4.65 V(-100 ~ 100 °/s)
IG ON

20
Acceleration Sensor Signal
Offset voltage :2.5 V
range : 0.35 V ~ 4.65 V(-1.8 g ~ 1.8 g)
IG ON

15
Yaw Rate Sensor Ground
GND LEVEL
Always

35
CAN High
not communication:2.5 ± 0.5 V
communication :

IG ON

14
CAN Low

30
BRAKE LIGHT SWITCH
voltage(High) : 0.8 * IG ON more
voltage(Low) : 0.3 * IG ON lower
BRAKE ON/OFF

more Case & please leave as comments

How to Check if Engine Hesitate when Acceleration?

Field Case Study of Hyundai Trajet due to spark plug wire the engine will hesitate when accelerate.

How to check if engine hesitate when acceleration?

Model: Hyundai Trajet V6

Year Model : 2004

Fuel : Gasoline

Displacement: 2700cc

Subject: engine hesitation – Spark plug wire.

1) Condition

1. Engine hesitation when starting in cold condition.
2. Poor engine power in warm condition.

2) Cause

• Number 1 spark plug wire is cracked.

3) Diagnosis

1. Scan tool check (DTC)
   = No trouble code
2. Inspect the engine condition with spark plug cable removed one by one.
   ( in  engine starting condion)
3. Inspect wave form using scan tool.
   = Abnormal wave form in # 2 cylinder.
4. Check the spark plug wires.
   = Abnormal condition (Number 1 wire is cracked).
   = After replacing the spark plug wire, the engine operates normally.

4) Repair Guides

• Replace the spark plug wire with new one.

more study

How to Fix an Engine Not Starting?

Model: Hyundai Santa Fe (SM)

Year Model: 2002

Mileage: 137500km

Displacement: 2000cc

Fuel: Diesel

T/A : Auto

Subject: Impossible to Start The Engine – Diesel Fuel

1) Condition:

1. Impossible to start the engine.
2. Cranking ids possible.

2) Cause:

1. Fuel line is clogged with contaminated diesel fuel.

3)  Trouble Diagnosis:

1. Scan tool check.
   = Current data: fuel pressure is lower than 44 bar during cranking.
   Specification : Higher than 150 bar.
2. Check the low pressure fuel line – The fuel pump does not operate.
3. After replacing the fuel pump, Start the engine is possible but hesitation still occurs.
4. Check the service data.
   = No trouble found.
   = The amount of fuel injection is 24 cc in the idle condition.
5. Check the amount of returned fuel to find poor injectors.
6. The color of diesel fuel is different from normal fuel.

4) Repair Guides:

1. Replace all the related parts.
   (Diesel fuel, low pressure pump ,fuel tank, fuel sender, fuel filter.
2. Clean the fuel system.
   = Diagnosis tips : Engine hesitation and/ or stalling problems on  CRDI diesel engine
   = If DTC code regarding sensor or fuel pressure is displayed, check the related to control engine idle.
3. Check method of fuel injectors
   = Check the amount of returned fuel from injectors and compare it each other.
   = Check the injection power balance.
   = Disconnect the injector connector one after another in idle condition.

More Study

Does Engine Stalling When You Accelerate?

Model: Hyundai Santa Fe
Tear Model: 2002
Mileage: 126345km
Displacement: 2000cc
Fuel : Diesel
T/A : All
Subject: Engine Stalling When Accelerating in Cold Condition – Fuel Tube
1) Condition

1. Engine Stalling in Cold Condition When Accelerating Suddenly.
   = Normal In Idling Condition.
   = Engine stalls more frequently in cold condition than in heat condition.
2. Engine stalls intermittently when driving in heating condition.
   = Normal in idling condition, but the engine stalls when driving on hilly road or decelerating suddenly.

2) Cause

1. Due to the fluctuation of low pressure tube, the fuel is not supplied enough so the engine stalls when accelerating.

3) Diagnosis

1. Scan tool check.
   = Diagnostic trouble code( P1181 = Fuel pressure monitoring fail.
   = Current data = Normal in cold and idling condition.(WGT).
   = The fuel pressure control valve increases abnormally when accelerating the engine suddenly.
2. Inspect the rail pressure(from low pressure to high pressure).
   = Check the pressure after stalling the fuel pressure gauge to low pressure line( The line between the low pressure pump and fuel filter)
   = The pressure is measured by 2.8 in idling condition.
   ( STANDARD VALUE 2.5~2.8 bar)
   = The pressure after installing the fuel pressure gauge between the filter and high pressure pump.
   = Normal pressure in idling condition.
   = The fuel pressure decreases rapidly when decelerating after the fuel pressure gauge is installed.
3. Inspect the fuel filter.
   = Drain the water from the fuel filter.
   = Check if there are remains in fuel filter after discharging the fuel.
4. Check the line from fuel filter to high pressure pump.
   = The tube near by fuel filter has been damaged.

4) Repair Guides

1. P1181 (C010) is related to fuel pressure. This is a basis of diagnosis.
2. Damage of tube may be occurred when producing the tube.
   The engine stalls in cold condition frequently because the fuel tube is contracted  in cold condition more than in heating condition. Therefore the fuel is not supplied enough to high pressure pump. Compared with this, in heating condition, the amount of contraction is small so the problem is not occurred.
3. If the fuel pressure malfunction is suspected, inspect the fuel pressure data and fuel pressure regulator  data in G- Scan with below condition.
4. P1181 (C010) fuel pressure monitoring fail ( fuel pressure high idle ) code
   = this code is displayed when abnormal fuel pressure is detected.

more study

Clicking Noise From Sunroof Sonata YF?

Model: Hyundai Sonata YF
Year Model: 2011
Displacement: 2400cc
Mileage: 10247km
Fuel: Gasoline
Subject: Clicking Noise From Sunroof.
1) Condition:

1. Unusual clicking noise from sunroof while driving.

2) Cause:

• Due to Sunroof linkage.

3) Diagnosis:

1. Road test to probe if the problem occurs = Noise occurs.
   
2. Pull out the Sunroof and check some linkage loosened.

4) Repair Guide:

• Repair and Retightened all parts

more study

Is Your Hyundai Santa Fe Has Engine Problem?

Let me Give you Some Field Case Study So That If Ever This Problem Occurs On Your Hyundai Santa Fe Car You Have Knowledge About It.

Model: Hyundai Santa Fe

Displacement: 2000cc

Year Model: 2002

Mileage: 123895km

Fuel: Diesel

T/A : Auto

Subject: Engine Rough Idling – Injector

1) Condition:

1. Engine RPM becomes rough and vibration occurs at idle speed.
2. Poor engine acceleration during driving.

2) Cause:

1. Malfunction of injector (Cylinder # 3).

3) Diagnosis:

1. Scan Tool Check
   = No trouble code
2. Check the low and high pressure line – Normal Condition.
3. Check the amount of returned injection fuel.
   = Lots of returned fuel in the # 3 injector.
   = The returned amount of fuel in the # 3 injector much more than other cylinder.
   = Normal amount of returned fuel for 3 minutes in warm engine is approximately 18~20cc.

4) Repair Guide:

1. Replace the injector # 3 assembly.

more field study

Unusual Engine Noise

Knocking noise usually from internal parts of engine.but this knocking sound is different from normal noise.

Model: Grandeur (XG)

Displacement: 3000cc

Year Model: 2003

Mileage: 128354km

Fuel: Gasoline

T/A : Auto

1) Condition:

1. Engine noise in cold condition or accelerating.

2) Cause:

• Damage Damper pulley.

3) Diagnosis:

1. The tension of Drive belt is normal.
2. The symptom disappears after dismounting the drive belt.
3. Damper pulley  vibrates after re-installing the drive belt.= Pulley is Cracked.

4) Repair Guide:

• Replace the Damper pulley

more study

Poor Engine Acceleration and Hesitation

Model: Hyundai Grandeur (XG)

Displacement: 3000cc

Model Year: 2004

mileage: 120430 km

Fuel: Gasoline

T/A : All

1) Condition:

1. Poor engine acceleration and hesitation.

2) Cause:

1. Surge tank is misassembled after the spark plug are replaced which cause air leaking.

3) Diagnosis:

1. Scan tool check
   = Diagnosis Trouble Code(P0100 – Airflow sensor malfunction.
2. Current data shows the injection time from injector which is longer than spec. at idling(4ms).
3. AFS output signal is 1567 mV at ignition on. This data is higher than specification.
4. After changing the AFS, poor acceleration is disappeared, but there are still unstable engine and air leaking noise at idling.
5. Cleaning spray(WD 40) is sprayed toward surge tank for leaking test, Engine RPM is charged when spraying , which indicates air leakage.

4) Repair Guide

• Reinstall the surge tank and replace the AFS.

more Study

Passenger fuse box affects Hazard and Signal Light?

Field Case Study

Model:Hyundai Elantra (HD)

Year Model: 2009

Mileage: 79251km

Displacement: 1600cc

T/A: All

Fuel: Gasoline

1) Condition:

1. Intermittent Turn and Signal light not Working.

2) Cause:

1. Due to the hazard and signal light fuse busted
2. Overheating Car Stereo.

3) Diagnosis:

1. Scan toll check = No trouble code found.
2. Check the fuse and relay from engine compartment fuse box = Hazard fuse busted (Replace fuse)
3. Check the fuse and relay from the passenger fuse box = signal or turn light fuse busted(Replace fuse)
   
   = Test the car with all lights on to see if the problem still occurs.After an hour = Ok All are working
   = Then  all lights switch off except signal light, then the Car stereo switch On After a minute suddenly the signal light block out.
4. Check for the Electrical Trouble Manual of Hazard and Signal light and Car Stereo = there is no wire connected to the Car stereo, but their only joint together on the electronically passenger fuse box.
5. Check for the diagram of Car stereo and check the wire connection = the power memory wire is seems like burnt from the passenger fuse box to the stereo terminal.
6. visually check the fuse box, power memory terminal corroded.
7. Check for wire shorted = OK all wire good.
8. Found out that the Car stereo overheating.

4) Repair Guide

1. Replace passenger fuse box and Car Stereo.

More Field Study

Auto Transaxle Diode Corrosion

Model:Hyundai H100 Truck (HR)

Year model: 2004

Mileage: 130956 km

Displacement: 2000cc

Fuel: Gasoline

T/A: All

Subject: Automatic Transmission Diode Corrosion in the Wiring Control

1) Condition;

1. Harsh Shift and Trans axle Hold in 3rd gear fail safe.

2) Cause:

1. Corrosion of the ATM diode pins in the control wiring.

3) Diagnosis:

1. Scan tool Check
   = Diagnostic Trouble Code
   1) P0707 – Transaxle range switch – open circuit.
   2) P0708 – Transaxle range switch – short circuit.
   3) P1529 – TCM error – Invalid message
   4) P1586 – Encoding signal circuit not rational.
2. Remove the control wiring grommet.
3. Locate the ATM diode that is wrapped up yellow tape loose yellow tape from the control wiring.
4. Disconnect the ATM diode using long nose pliers.
5. Clean the diode connector (Female side) using solvent.
6. Apply contact grease in each opening of the diode connector terminal (Contact grease (P/No. : 08970 – 00010)).
7. Insert the new ATM diode into the diode connector.
8. Reinstall the wiring and water proof tape around the control wiring within the range as shown.

4) Repair Guide:

1. Replace the Auto TM diode.
   = Do not replace auto TM or control wiring harness.

 more diagnosis

Malfunction Of Door Warning Light

Model:          Hyundai Grandeur (XG)
Year model:   2004
Mileage         140142km
Displacement:3500cc
Fuel:            Gasoline
1) Condition:

1. The door ajar warning light fails to operate when the door is opened.
2. Blown fuse once or twice a week.

2) Cause:

1. A short circuit of front right side door.

3) Diagnosis:

1. Check the door connections on the left and the right side – Trouble not found.
2. Check the passenger junction block connector – Abnormal.
3. Check the front right side door warning – A short  circuit between the wire and the Body.

4) Repair Guide:

• Repair front door wiring harness.

more Trouble Shooting