AC problem blowing hot 08 Saturn Vue

 Auto Repair Questions, Saturn  No Responses »
Jul 182017
 

2008 Saturn Vue

AC problem blowing hot

08 Saturn Vue 3.6 engine has an AC problem blowing hot at stoplights. Mechanic diagnosed it, replaced the expansion valve and radiator fan assembly and performed evac and recharge to no avail. Mechanic is unavailable right now. Any ideas on what else could be the culprit?

Sounds like they were on the right track as far as thinking the high speed fan wasn’t functioning. A new fan was installed but I wonder if the issue is in a high speed relay or something. Lets pull up the Cooling fan wiring diagram and take a look.

Cooling fan wiring diagram 2008 Saturn Vue

2008-saturn-vue-cooling-fans-1-of-1

It looks like there might be a couple of relays in there that you could swap around for testing.

Air Conditioning System Description and Operation

A/C Cycle

Refrigerant is the key element in an air conditioning system. R-134a is a very low temperature gas that can transfer the undesirable heat and moisture from the passenger compartment to the outside air.

The A/C compressor

The A/C compressor is belt driven and operates when the magnetic clutch is engaged. The compressor builds pressure on the vapor refrigerant, which adds heat to the refrigerant. The refrigerant is discharged from the compressor through the discharge hose and is forced to flow to the condenser and then through the balance of the A/C system. The A/C system is mechanically protected with the use of a high pressure relief valve. If the high pressure switch/sensor were to fail or if the refrigerant system becomes restricted and refrigerant pressure continues to rise, the high pressure relief will open and release the excess pressure refrigerant from the system.

Compressed refrigerant enters the condenser in a high temperature, high pressure vapor state. As the refrigerant flows through the condenser, the heat of the refrigerant is transferred to the ambient air passing through the condenser. A cooling fan assists in the airflow especially when Parked. Cooling the refrigerant causes the refrigerant to condense and change from a vapor to a liquid state.

The condenser

The condenser is located in front of the radiator for maximum heat transfer. It is made of aluminum tubing and aluminum cooling fins, which allows rapid heat transfer for the refrigerant. The semi-cooled liquid refrigerant exits the condenser and flows to the Receiver/Dehydrator(R/D).

The R/D contains desiccant that absorbs moisture that may be in the refrigerant system. The R/D also acts as a storage vessel to ensure that a steady flow of liquid reaches the Thermal Expansion Valve (TXV). The refrigerant exits the R/D and flows through the liquid line to the TXV.

The TXV is located at the front of dash and attaches to the evaporator inlet and outlet pipes. The TXV is the dividing point for the high and the low side pressures of the A/C system. As the refrigerant passes through the TXV, the pressure on the refrigerant is lowered. The TXV also meters the amount of liquid refrigerant that can flow into the evaporator.

Refrigerant exiting the TXV flows into the evaporator core in a low pressure, liquid state. Ambient air is drawn through the HVAC module and passes through the evaporator core. Warm and moist air causes the liquid refrigerant to boil inside of the evaporator core. The boiling refrigerant absorbs heat from the ambient air and draws moisture onto the evaporator. The refrigerant exits the evaporator through the suction line and back to the compressor in a vapor state, and completes the A/C cycle of heat removal. At the compressor, the refrigerant is compressed again and the cycle of heat removal is repeated.

The conditioned air is distributed through the HVAC module for passenger comfort. The heat and moisture removed from the passenger compartment condenses and is discharged from the HVAC module as water.

2003 Saturn L300 V6 3.0L fuel problems

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Jun 212017
 

2003 Saturn L3002003 Saturn L300 V6 fuel problems?

I’m at a loss. We assumed with no fuel pressure & cranking but no start. After checking the fuse & relay for fuel & everything checks out fine. The wires look good, new fuel pump. Attempted the relearn procedure, new battery still no start or pressure. I swapped the ac relay with the fuel relay & got the gauge to register one time but after that still no start. Checked all fuses in & out of car as well as relays.

The car sat for 6mths without a battery before I got it but had all the fuel problems before that. Scanner says no communication ensure key is on…

Does anyone have any ideas? Thank you!

Just to cover a few basic things first. Did you put fresh gas in the tank after replacing the fuel pump? and was the fuel filter replaced at the same time? Once the fuel filter is replaced the fuel system needs to be primed.

How to prime the fuel system

  1. Cycle ignition key on and off, holding the key in the “ON” position of 5 seconds and then back to “OFF”. This is repeated at least 10 times.

The reason for this is the fuel pump relay only stays on for a second or two. By cycling the ignition key we effective operate the fuel pump long enough to build adequate pressure.

4 Things an Engine Needs in order to Run

 Auto Repair Articles, Auto Repair Questions, Saturn  No Responses »
Mar 112017
 

4 Things an engine needs in order to runMy 2000 Saturn SL2 will crank but wont turn over. I changed fuel pump and filter, crank sensor, ETC sensor, starter, spark plugs are good. A few months ago we changed the ignition coil. Why wont this car start?

RESPONSE

4 Things an Engine Needs in order to Run

  1. Spark
  2. Fuel – fuel pressure and fuel injector pulse
  3. Compression
  4. Timing – All of the above at the right time

Knowing the 4 things an engine needs in order to run lets us know what to look for. Or better yet look for whats missing. If you know you have spark you may try spraying starter fluid in the air filter. If the engine tries to run on the starter fluid you know the problem is fuel related. And now you can concentrate on the problem system. When the engine doesn’t want to start on starting fluid the next step would be to confirm no spark at the spark plugs.

Engine still won’t start

I have created a handy no start diagnostic chart for just such an occasion.

Check Engine Light On

Of course if the check engine light is on it would be a benefit to know why. For your vehicle though a scan tool will be needed.

 

 

Won’t Turn Over 2006 Saturn ION

 Auto Repair Questions, Saturn  No Responses »
Dec 132016
 

2006 Saturn IonBought car no key, had to change out steering column got new key. Won’t turn over or start.

RESPONSE

Check for battery positive at the “S” terminal on the starter while someone holds the ignition key in the “START” position. If you see battery voltage, replace the starter. Otherwise you will need to trace the wiring to determine why it is not getting voltage. I’ll provide a wiring diagram for the starting system. It may be a good idea to double check your work to make certain you did not leave something disconnected.

2006-saturn-ion-starting-circuit-1-of-1

Replace PCM 1999 Saturn SC Series

 Auto Repair Questions, Saturn  No Responses »
Nov 252016
 

1999 Saturn SChad to replace pcm unit. it says what causes that is voltage overload-often due to short in solenoid or actuator circuit. what does that mean?

RESPONSE

Voltage overload is when a larger amount of voltage is seen compared to what it is normally capable of seeing.

A short is when a positive connects with a negative.

A solenoid or actuator is an electrical device that move when voltage is applied.

So what is being said is something shorted out in a solenoid or actuator circuit(the sytem in which it operates). The short caused a voltage spike(positive or negative) to the PCM – Powertrain Control Module (engine computer). And the end result was the computer was damaged.

Replace PCM

Removal Procedure

Important Record present radio stations and clock time. Disconnect negative battery cable.

 

  • Remove I/P upper trim panel outer cover fillers by carefully lifting up at clip locations, starting at the rear above end cap.
  • Remove I/P bolt caps by carefully prying with a small flat head screwdriver.
  • Take out I/P upper trim panel screws.
  • Lift I/P upper trim panel at clip locations on rear edge to disengage clips.
  • Pull I/P upper trim panel rearward out of clips at bottom of windshield.
  • Important Be careful when removing or replacing I/P upper trim panel, not to damage VIN plate.
  • Remove I/P upper trim panel.
  • Important Be careful when removing or replacing I/P upper trim panel, not to damage upper trim panel seal.
  • Remove I/P upper trim pad sound insulator.
  • Disconnect PCM electrical connector from under instrument panel.
  • Important Do not pull on the connectors or wires to remove the PCM. This could back out a terminal and cause an intermittent connection.
  • Loosen PCM attachment out at cross car beam and lift PCM upward (towards windshield) to disengage PCM from ABS/PCM bracket.

 

Code U1096 Saturn Vue 2002

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Sep 142016
 

2002 Saturn Vue’02 Saturn Vue (V6/AWD/5 Spd AT). Scanned ECM, TCM, BCM, SDM & EPS for codes. One code found U1096 with Service Wrench light illuminated (Lost communication with IPC). IPC Connector resistance to ground (B4) is less than 1 ohm and IPC Connector voltage (B2) is 12.3 V. IPC functions as it should (Both while running and KOEO bulb check). Anyone seen this before?

RESPONSE

You will need to check power/ground in the instrument cluster and if good do a resistance test on Data wire, if good replace instrument cluster.

 

Code U1096 Loss Of Communication With IPC

Possible Causes Setting Conditions
  • IPC Class 2 circuit is open, shorted to ground or to voltage
  • IPC Ignition circuit has a high resistance condition
  • IPC main ground circuit(s) has a high resistance condition
  • IPC (module) may have failed and is pulling the circuit low
  • Refer to the Data Link Connector diagnostics
 Key on, and a message from a learned ID number was not detected for the five seconds. Modules on the Class 2 circuit monitor for data communications during vehicle operation. When a module receives a message for critical data it records the identification number of the module sending the message for State of Health monitoring (Node Alive messages). Once a module learns an ID number, it checks for that module’s Node Alive message.

This code sets in 1 Trip(s).
This code will turn on the MIL (Malfunction Indicator Lamp)

Crankshaft Position Sensor 2002 Saturn Vue

 Auto Repair Questions, Saturn  No Responses »
Jul 012016
 

2002 Saturn Vuequits running while driving but starts back. Could it be the crankshaft position sensor?

RESPONSE

This could be from a loose electrical connection. This could be from a faulty or failing engine sensor. Or could be from a failing ignition control module. The most common for this engine would be the crankshaft position sensor.

Crankshaft Position Sensor Replacement 2002 Saturn Vue 2.2L engine

 

  • Disconnect the negative battery cable.

crankshaft position sensor 2002 Saturn Vue

 

   •  Engine Harness Connection (1)
   •  Battery Feed (2)
   •  Starter Motor (3)
   •  Starter Solenoid (4)

 

  • Raise the vehicle.
  • Remove the 2 starter solenoid harness connector attachment nuts.
  • Remove the lower starter assembly to the engine block bolt.
  • Remove the upper starter assembly to the engine block bolt.
  • Move the starter right to clear the engine block, then left to remove the starter from the flywheel housing.
  • Disconnect the CKP Sensor harness connector.
  • Remove the CKP sensor attachment bolt and remove the CKP sensor.

 

 

 

06 Saturn Ion Coupe automatic

 Auto Repair Questions, Saturn  No Responses »
Jun 072016
 

2006 Saturn IonI have a 06 Saturn Ion coupe automatic with 150000 miles. It has had all of its recalls, however I continue to have a problem with it stalling out at lights, stop signs or just about any time it is idling. I am at a loss of what is wrong with it, and do not have a lot of money to invest in repairs for it at this time. Any answers your could give would me much appreciated

RESPONSE

First thing that comes to mind would be a sticking IAC – Idle Air Control or a vacuum leak that would cause the IAC to fight itself.

2002 Saturn l200 2.2 liter

 Auto Repair Questions, Saturn  No Responses »
May 102016
 

2002 Saturn L200As I’m driving the car it cuts off, it doesn’t make a sound, it doesn’t hesitate cutting off and then it won’t start for about like 30 minutes. I just put a new starter on it.

RESPONSE

Sounds like something is getting hot and shutting down and once it has a chance to cool it works again. This is common to electronic components. Most common failure component that acts like this would be the ignition control module. I have looked up the part and double checked to make sure it will fit your Saturn L200.

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