Question about 2006 Chevrolet Tahoe

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First the low tire pressure on in morning until driven - pressure fine. Next when I shut off the vehicle the blower fan would not shut off. Fan continues to run until battery dies. Changed battery and when tightened bolt, the fan immediately turns on until battery is unhooked. Please help!!!

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Had this problem on my 2004tahoe. there is a fan control module that is bad. The module, if i remember correctly, is inside the heat control box on the passenger side. the fan is there as well. the part is about 150? - shop around.

Posted on Dec 12, 2010

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Check low side pressure or try bypassing low pressure switch with a paper clip in the connector. If pressure is good but bypass works, you need a new pressure switch. If pressure is low, charge the system. If pressure and presxure switch are good, please get back to me and I'll do some research.

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2008 trail blazer 4.2 4x4 fan under the hood runs all the time. Why how to fix?


What fan ? Your vehicle doesn't electric cooling fans , has engine cooling fan and clutch driven by the crankshaft via the drive belt. Your probably taking about the
Secondary Air Injection System Description .
The secondary air injection (AIR) system aids in the reduction of hydrocarbon exhaust emissions during a cold start-up. This occurs when the start-up engine coolant temperature (ECT) is between 5-50?°C (41-122?°F), and the intake air temperature (IAT) is between 5-60?°C (41-140?°F). The AIR pump operates 5-60 seconds after start-up.
The engine control module (ECM) activates the AIR system by simultaneously supplying grounds to the AIR pump and the AIR valve relays. This action closes the relays' internal contacts. The AIR pump and the AIR control solenoid valve/pressure sensor assembly are in turn energized, the pump runs and the control/shut-off valve opens.
The AIR pump sends pressurized fresh air into the pipes/hoses through the open control/shut-off valve, and into the exhaust manifold. The extra air accelerates the catalyst operation, helping it to reach operating temperature faster. The AIR pump remains ON for a short period of time after the control/shut-off valve is commanded OFF. When the AIR pump is commanded OFF it will not run or be activated until the next vehicle start. When the AIR system is inactive, the closed AIR control/shut-off valve prevents air/exhaust flow in either direction.
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Problem with 2004 F150 A/C. Intermittantly the fan and A/C will shut off, just completely quit. Then after a few minutes it will come back on


Try the fan blower. It should be inside the cab, on the passenger's side, under the glove compartment. Easiest way to check, when is not working, hit the plastic cover under the glovebox, if it starts, it is the blower. Sometimes you need the hit it several times, until you hit the actual blower.

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1 Answer

2005 grand Cherokee service tire pressure system


I found this on another site, it may help to understand what is happening, I also saw that there is a problem with the valve stems cracking since they're made out of aluminum and causing that problem. Here's the explanation provided on another site:

RodneyJ Answered 6 years ago
If a customer with a 2005 or later DaimlerChrysler vehicle equipped with Tire Pressure Monitoring (TPM) is concerned that the TPM lamp is on continuously, please be sure to inform the customer that the system is in place to warn of a low tire pressure situation, and a system diagnosis may not be required. The customer should be aware of the following: The Tire Pressure Monitoring (TPM) System will warn the driver of a low tire pressure based on the vehicle recommended cold placard pressure (the placard is located on the drivers side B-pillar).
The tire pressure will vary with temperature by about 6.9 kPa (1 psi) for every 6.5 Degrees C (12 Degrees F). This means that when the outside temperature decreases, the tire pressure will decrease - the customer should adjust his tire pressure for this decrease in pressure - please refer the customer to his vehicle owner's manual for information on how to properly inflate his vehicle's tires. The tire pressure will also increase as the vehicle is driven - this is normal and there should be no adjustment for this increased pressure.
The TPM System will warn the driver of a low tire pressure if the tire pressure falls below the low pressure warning threshold for any reason, including low temperature effects.
The TPM System will continue to warn the driver of low tire pressure as long as the condition exists, and will not turn off until the tire pressure is at or above recommended cold placard pressure. Once the low tire pressure warning has been illuminated, the tire pressure must be increased to the recommended cold placard pressure in order for the TPM warning lamp to be turned off. The system will automatically update and the TPM warning lamp will extinguish once the updated tire pressures have been received. The vehicle may need to be driven for up to 10 minutes above 25 kph (15 mph) to receive this information.


FOR EXAMPLE:

A 2006 300 has a recommended cold (parked for more than 3 hours) placard of 207 kPa (30 psi).

If the ambient temperature is 18 Degrees C (65 Degrees F) and the measured tire pressure is 186 kPa (27 psi) the TPM lamp will be OFF.

IF NOTHING IS DONE TO THE AIR PRESSURE IN THE TIRES and the ambient temperature drops to 20 Degrees F (-7 Degrees C) while the vehicle is parked, the approximate tire pressure will be 157 kPa (23 psi) and the TPM lamp will be ON.

IF THE VEHICLE IS DRIVEN TO REACH NORMAL OPERATING TEMPERATURE

WITHOUT ADJUSTING THE AIR PRESSURE and the ambient temperature stays at -7 Degrees C (20 Degrees F), the approximate tire pressure will rise to 186 kPa (27 psi) and the 1PM lamp will be ON.

To turn the TPM lamp OFF the tires must be inflated to the vehicle recommended cold placard pressure.

In order to properly maintain vehicle tire pressure, please refer to the owner's manual for additional information regarding tire inflation.

NOTE :Tire pressure should always be set based on cold inflation tire pressure (defined as the tire pressure after a vehicle has not been driven for more than 3 hours - and in outside ambient temperature).

Seasonal temperature changes will affect tire pressure, and the TPM system will monitor the actual tire pressure in the tire.
If a diagnosis of the system is required (for example, the lamp did not extinguish, or the lamp is flashing), please refer to service information available in TechCONNECT for additional information for TPM diagnosis. Please be aware that if the Wireless Control Module (WCM) is replaced, the TPM placard values may need to be reprogrammed. The TPM placard values do NOT need to be updated if the WCM has NOT been replaced, the TPM placard values are properly set at the factory.

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1 Answer

Electrical Issue with blower fan causing ignition coil failures


I checked the manuals on your vehicle, and it looks like your blower and PCM are right next to each other. I would check them and look for any obvious signs of an issue first.

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1 Answer

Rav4, 2008 with a warning light on that looks like "tire tread' with "mark of exclamation". Checked all tyres for pressure. All corect. Light "ON"


That could be the low coolant level so try this...

Physically look in the radiator under the cap(if one exsist's) when cool, for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.

If radiator is low on coolant fill it to overflowing, replace cap, and check that coolant overflow is filled to the COLD line or mark. The overflow is normally where you would add coolant. After refilling as outlined above, check the level every morning for 2 or 3 days until coolant level stops dropping below the cold mark and add coolant to the overflow ONLY. Do not open the radiator cap.

For more OVERHEATING PROBLEMS try these...
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, try backflushing it, or replace.
Thermostat stuck open or shut, replace it.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.

Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it's loose, airflow can actually push it out of place making it useless or blocking the airflow. Along with that, there may also be a plastic piece attached to the bottom of, and wraps up behind the bumper. If it

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2 Answers

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The Low Tire Pressure Indicator must be reset using the Radio. This can only be performed if you have the factory radio installed in the vehicle. This vehicle does not come with an active tire pressure management system, and as such, this light must be reset manually.
1.) Turn Radio Off 2.) Hold down disp button for 10 seconds 3.) Setup Menu should display 4.) Scroll through menu to view "Tire Pressure" (use seek buttons) 5.) Select the Tire Pressure option (Press Radio Button 1) 6.) Reset should be displayed on screen (Press disp button) 7.) Tire Pressure Light should reset

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Sounds like the coolant fan is not working properly on your vehicle, if you put the fan speed setting to its highest speed with the a/c on and the engine idling does the fans come on? If no you need the system to be tested for a bad switch, coolant fan relay, defective fan motor.
If the fan comes on only on high blow you will need the blower fan switch tested for a short or open in the low and mid range settings, if the coolant fan isn't coming on the condensor coils will overheat the a/c system causing excessive head pressure on the high side and causing the a/c unit to shut down and blow hot air.

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