Question about 2003 Toyota Matrix

1 Answer

A/C turns off during operation

My air conditioning works fine most of the time. Recently however, the air will warm up during operation as though the a/c has been turned off. I have found that if I either temporarily turn off the system (turn fan to off) or turn off the a/c (via the a/c button), wait several seconds, and then turn it back on it will often return to blowing out cold air again. I just recently checked the freon level and it appeared fine. Any ideas what could be cycling off my a/c? Many thanks for any help.

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I encountered a similar problem not long ago, though it was a freon issue and discovered that it was something totally different when the low port reading was 125psi. Confused at the reading, and inexperienced with AC systems I sought secondary opinions, and disovered a solution to my particular issue. The compressor clutch was not engaging due to a faulty relay, thus the system was not cooling--hence the buildup of pressure on the low port line. Truthfully, there could be a number of things causing your AC to act up, here are some of the things to check first & foremost:

1. AC Compressor Control Relay (defined as "M/G CLT" or Magnetic Clutch Relay) may be failing. This can be located in the electrical box to the right of the battery under the hood.

Turn the car on, set the AC to MAX and let it run for a while. While facing the front of the car, look under the hood on the left side of the engine. Straight down in front you will see the AC Compressor. There is a belt spinning a pulley, and a clutch assembly within that pulley which engages the compressor. Use a flashlight to see if the clutch is engaging. If you find that it cycles on and off, then you could possibly be a bit low on freon..

If you've checked the freon and it's within range, then try swapping the "FOG" relay with the "M/G CLT" relay (DO NOT DO THIS WHILE THE VEHICLE IS RUNNING). After the swap, start the vehicle and set the AC on MAX. Inspect the compressor again to see if the clutch is engaged. If your clutch was not engaging on your prior freon psi check, then check it again while the clutch is engaged and the system is cooling--this will give you the proper reading for your freon levels. If this solves your problem, DO NOT leave the FOG relay in place of the M/G CLT relay. Go to an auto parts store and purchase a new relay--OEM costs about $70.00, standard replacements (which I happen to have part numbers for.. AdvanceAuto: #R6034, or #35874. NAPA: #TEM207703, or ECHAR6034. AutoZone: #MT0610. O'Reilly Auto: #35874) run anywhere from $14.00 to $30.00 depending on where you go, and what quality/warranty you desire.

2. AC Compressor -or- comp clutch may be failing. If the air comes on and cools intermittently and the relay is functioning, then it may be a problem with a slipping belt. Check your tensioner on your serpentine, as well as the belt. Make sure there are no cracks in the belt and that it is tight along its route.

If neither the relay nor the belt are the cause of your problem, then you may possibly want to have your system purged, flushed/cleaned, and recharged... this is the more expensive part of maintaining an AC system.

Hope that solves your problem!

Posted on Jul 03, 2009

  • Jason Habel Jan 12, 2014

    Belated response but just wanted to come back and let you know this was spot on. It was the relay that was faulty. Repaired for $30.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My heater is stuck on and blows extremely hot air at all times, harder and hotter once it has warmed and is being driven. Though, never off at any time.


it would appear that you will have to replace all items damaged during the theft attempt
as all the items are part of the dash assembly including the radio, I would consider a complete dash from the wreckers and that way you only have to hook up the wiring harness connections

Oct 14, 2015 | 2000 Mazda Protege

1 Answer

What are the probable causes of DTC P2444?


Hello Please read this carefully. This info directly relates to the code you are having. I will include a troubleshooting tree at the bottom. If there are any other codes or if you need further info please let me know:

SYSTEM DESCRIPTION The secondary air injection (AIR) system aids in the reduction of hydrocarbon emissions during a cold start. The system forces fresh filtered air into the exhaust stream in order to accelerate the catalyst operation. An electric air pump, the AIR pump, provides filtered air on demand to the AIR control solenoid valve/pressure sensor assembly. The AIR control solenoid valve/pressure sensor assembly controls the flow of air from the AIR pump to the exhaust manifold. The AIR valve relay supplies the current needed to operate the AIR control solenoid valve/pressure sensor assembly. A pressure sensor is used to monitor the air flow from the AIR pump. The powertrain control module (PCM) supplies the internal pressure sensor with a 5-volt reference, an electrical ground, and a signal circuit.

The AIR diagnostic uses 3 phases to test the AIR system:
  • DTCs P0411 and P2430 run during Phase 1
  • DTCs P2430 and P2440 run during Phase 2
  • DTC P2444 runs during Phase 3
In all 3 phases, testing is accomplished by comparing the measured pressure against the expected pressure. The PCM can detect faults in the AIR pump, AIR control solenoid valve/pressure sensor assembly, and the exhaust check valve. The pressure sensor can also detect leaks and restrictions in the secondary AIR system plumbing.

The DTC P2444 Secondary Air Injection (AIR) Pump is Stuck ON diagnostic monitors the system pressure signal during test phase 3. When the PCM determines the AIR pressure sensor signal is higher than expected, DTC P2444 sets.

DTC DESCRIPTOR
This diagnostic supports the following DTC:
  • DTC P2444 Secondary Air Injection (AIR) System Pump Stuck On
CONDITIONS FOR RUNNING THE DTC
  • DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0201, P0202, P0203, P0204, P0205, P0206, P0300, P0350, P0411, P0412, P0418, P0420, P0606, P0641, P0651, P1350, P2430, P2431, P2432, P2433, P2440 are not set.
  • The system voltage is between 10-18 volts .
  • The engine is running.
  • The start-up engine coolant temperature (ECT) parameter is between 5-50°C (41-122°F) .
  • The start-up intake air temperature (IAT) parameter is between 5-60°C (41-140°F) .
  • The BARO parameter is more than 60 kPa .
  • The MAF sensor parameter is between 3-24 g/s .
  • DTC P2444 runs once per trip start-up when the above conditions are met and the AIR pump operation is requested.
CONDITIONS FOR SETTING THE DTC
The measured AIR pressure is more than expected during AIR pump Phase 3 operation. DTC P2444 sets within 5 seconds when the above conditions are met.

ACTION TAKEN WHEN THE DTC SETS
  • The PCM illuminates the malfunction indicator lamp (MIL) during the first key cycle in which the diagnostic trouble code (DTC) sets.
  • The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Freeze Frame buffer.
CONDITIONS FOR CLEARING THE MIL/DTC
  • The PCM turns OFF the MIL on the third consecutive trip cycle during which the diagnostic has been run and the fault condition is no longer present.
  • A DTC will clear after 40 consecutive warm-up cycles have occurred without a fault.
  • A DTC can be cleared by using the scan tool Clear Information function.
DIAGNOSTIC AIDS

Inspect for any of the following conditions:
  • The resistance of the AIR pump relay coil (across terminal 85 and terminal 86) is 50-70 ohms at 20°C (68°F) . In the normal unenergized state, the resistance of the open relay contacts (across terminal 30 and terminal 87) is infinite.
  • The AIR pump relays electrical contacts may be pitted and sticking. Replace the relay if tapping gently on the relay or wiggling the relay causes a change in the relays operation.
  • The performance of the AIR pump relay may be affected by temperature. Check the relay after sitting outside overnight and after running the engine 30 minutes .
  • An intermittent malfunction may be caused by a fault in an AIR system electrical circuit. Inspect the wiring harness and components for an intermittent condition.


21812371-jq13pypi3egybe0aho3o0ljx-4-0.gif

The numbers below refer to the step numbers on the diagnostic table.
  1. This step tests for the correct operation of the AIR pump. When the AIR pump relay is commanded ON with the scan tool, only the AIR pump relay is energized. When the AIR valve relay is commanded ON with the scan tool, both the AIR pump and the AIR valve relays are energized.
  2. This step tests for the correct operation of the AIR pump relay.

Nov 27, 2013 | 2005 Buick LaCrosse

1 Answer

I have a 2001 Mercury sable with climate control. The air-conditioning works fine the first time the car is started for the day, or if it sits for approxamately 3 hours. But if I drive up to the store, and...


the heat exchanger will do that ,, its normal and should only blow warm air for a minute or two, as long as it starts cooling again,, thats fine , and actually a Ford Motor Company trait

Jul 19, 2011 | 2001 Mercury Sable

2 Answers

My 2000 Grand Cherokee Laredo 4.0 has a rough idle and high oil pressure. Could an alternator cause a rough idle? I have to give it gas to get it started. Do you know why that is? There is also a...


Not caused by alternator. check the idle air control motor operation (take it off and see if it moves when the key is turned on. also clean out the air passages while you have the motor out) and clean the throttle body with carb cleaner. I have pasted some info on the EVAP purge valve--it may be operating normally. Is your engine light on? If yes, can you get a free scan at your local parts chain and send us the trouble codes?

  1. The IAC motor is located on the throttle body.
  2. Remove air duct and air resonator box at throttle body.
jturcotte_31.gif
Evaporative Emission Purge Solenoid
Description & Operation
The duty cycle EVAP canister purge solenoid (DCP) regulates the rate of vapor flow from the EVAP canister to the intake manifold. The Powertrain Control Module (PCM) operates the solenoid.
During the cold start warm-up period and the hot start time delay, the PCM does not energize the solenoid. When de-energized, no vapors are purged. The PCM de-energizes the solenoid during open loop operation.
The engine enters closed loop operation after it reaches a specified temperature and the time delay ends. During closed loop operation, the PCM cycles (energizes and de-energizes) the solenoid 5 or 10 times per second, depending upon operating conditions. The PCM varies the vapor flow rate by changing solenoid pulse width. Pulse width is the amount of time that the solenoid is energized. The PCM adjusts solenoid pulse width based on engine operating condition.

jturcotte_32.gif

Nov 03, 2010 | 2000 Jeep Grand Cherokee

2 Answers

91 ciera only does defrost, no vents or AC


i believe this is a vacuum operated system. if there is a problem with the vacuum supply to the control unit, it will automatically default to defrost. i would start by checking the vacuum source lines. good luck!

Mar 22, 2010 | 1991 Oldsmobile Cutlass Ciera

1 Answer

Stalling and getting hot


Clean the temperature sensor wire connector.
Replace the temp sensor.
Check the condition of the sensor wire cut(s) or short onto the engine block.
Monitor the fan operation with the hood open during warm up (0-15 minutes.) It should ran after the engine coolant temp get above 195F +.

Clean air filter. Air restriction will will make engine ran RICH and stall. It can also block the catalytic system is too much fuel pass though the cat.



Feb 14, 2010 | 1998 Dodge Ram 1500 4WD

1 Answer

No heat even though the engine temp is perfect


sounds like air has entered the cooling system or there is a blockage in the heater core.

Feb 02, 2010 | 2000 Volkswagen Jetta TDI

1 Answer

2000 buick century idles fast when cold I let it run for couple minutes turn off start back up and idles just fine


Is the car idling faster than it has in the past when cold? The car is designed to idle a little faster than normal during warm up, to warm the engine quicker, and to keep it running. The fuel/air mix richens, (more fuel in the mix than normal), during start up conditions, and then as the engine warms, it should idle down to normal. Have you allowed it to continue its fast idle to see if it idles back down? Your post indicates that you turn it off and re-start to prompt the car to idle down. You have electronic fuel injection. The system adjusts to the prevalaint conditions to give you the perfect mix regardless of the condition it is presented with. It gathers input from a series of sensors that detect engine temp, outside temp, humidity and air pressure, to deliver the mix it needs. Often, when the mix is off, it is a result of a faulty sensor. This can be detected by running a fault code diagnostic check. You can have this performed for free at most national parts chains such as advance or auto zone. Other factors can cause an improper mix, such as dirty or clogged injectors, and/or a dirty air filter. Good Luck! I hope that you find this to be very helpful!

Dec 04, 2009 | 2000 Buick Century

1 Answer

Front air condition does not blow cold. Rear air condition does


sounds like a damper door in the front not working properly, these are actuated by the front temp control, the door is operated by either a manual cable, and electric actuator, or vacuum. I hope this helps you zero in on your problem. Merry Christmas

Dec 22, 2008 | 2001 Nissan Quest

Not finding what you are looking for?
2003 Toyota Matrix Logo

1,453 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8140 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...