carlover_rx

Thanks. but it has impact on AC high pressure side. My high pressure side ac hose got leaked near compressure due to higher temp. So ac condenser won't cool down gas efficiently. Specially when vehicle is parked and in idle mode with AC switched on.

hi, you may check below : 1) Rear balance & stabilizer bars whether their is any play between joints , screws or broken rubber bus. - Inorder to check this you need to jack the vehicle from the chassis, leaving all 4 wheels free without any load. otherwise you wont be able to diagnose with the vehicle load on these joints. 2) Check rear suspension. You may check whether suspension bolts & screws are tightened enough. Inorder to check this you have to remove two plastic lids from the in-cabin boot compartment. Located on the rear mudguard. 2) Check Silencer bushes 3) Check whether you have placed your spare tire on correct side. Avoid any metal to metal contracts between tire RIM & tire rack. hope this helps.

Hi, i have Lexus RX 330 2005. I noticed my Radiator/Condenser cooling fans operate only in "Low Speed" Mode in all 4 scenarios below. < Refer Attachment > a) Engine coolant temperature 90°C (194 °F) or below - > Rotate (Low speed) b) Engine coolant temperature 95 °C (203 °F) or above -> Rotate (High speed) c) A/C Refrigerant pressure is less than 1,520 kPa (15.5 kgf/cm2, 220 psi) -> Rotate (Low speed) d) A/C Refrigerant pressure is 1,520 kPa (15.5 kgf/cm2, 220 psi) or above -> Rotate (High speed) I already checked below. - Removed fan connectors from fan control module & directly wired fan motors to battery. Both fans rotate in high speed. -> No issue with fan motors - Removed and re-plugged A/C pressure sensor socket. A/C compressor cut off happens in normal fashion. - Test control pulse to fan control module. ( i.e. " Small Green wire " ). It gives 1.7v~ 2.0v for radiator coolant temp triggers , 2.5v for Air Con triggers Any clue on whats wrong here ... Is it due to faulty fan control module ? Do anyone have 2004 ~ 2009 RX 330 / 350 fan control wiring diagram ? thanks.

hi, Finally managed to sort this out. Hope this may help you guys too. Setp by step diagnosis: ----------------------------- 1) i removed the power out sockets ( there are two connecters for two fan motors. refer pic attached) from the fan controller unit and checked the voltage using a voltage meter. Power is there when i switch on the A/C. - > Meaning no electrical issue upto the fan controller output. 2) Then using a flexible wire i directly gave power to fan motors from the battery. a. Left side one started immediately. - meaning no issue b. Right side not started immediately. when i tap the fan motor with a screw driver it started to rotate. seems there is a brush contact issue inside the motor. - > Meaning i had to replace the faulty fan motor ( since motor is sealed type, cant repair ) 3) Reason why both fans were not working was b'cos, two motors are powered in "series mode" from the fan controller. Thus if one is not working, other will also not work. :-( 4) If the cooling system is not wirking well and not maintaining the temp, ECU will automatically shutoff A/C system to avoid any further damages to the engine & radiator. -> Thats why a/c went off. 5) I managed to find a used fan mortor from a recon-parts shop for USD 70. Now everything back to normal. Note: please check whether fans get triggered for both A/C as well as radiator temp. - To test this 1st switch off a/c and let the enegine to run for a while. Make sure you have enough radiator coolent. At a certain temp radiator colling system will trigger the fans. if this is ok that means radiator cooling system thru radiator temp trigger is woking normal. - Next switch on A/c and set below; i) Temp = MAx cold ii) Air recurculation mode = internal circulation , iii) Blower speed = Low. Let the A/c runs for a while. at a certain point A/C compressure will cut off. at the same time fans will also switch off. If htis is happeneing then that means radiator cooling thru A/c system trigger is working normal. hope this will help you guys. Cheers

hi all, i have a 2003 Toyota Harrier 300G. its a Japanese import. ( Similar to Lexus RX 330 / 350 in US ). The display screen on the dash which houses A/C, TV and GPS also. Currently it has done 110,000km Few days ago i noticed this A/C issue. Suddenly a/c stopped working. it was not cooling at all. When i opened the bonnet, i noticed that a/c compressor was not working, and even the 2 cooling fans behind the radiator was not working. At that point i noticed that temp gauge was moving towards RED zone. so i immediately stopped the engine and kept for a while to cool down. After 30mins when i started the engine every this was fine back to normal. i was amazed. A/c comp clutch & 2 fans back to normal. Everything went ok for 2 days. however today suddenly it happened again. Now both cooling fans are not working i checked below. 1. Radiator coolant - almost full both inside the radiator & reservoir. 2. A/C diagnostic codes : shows "00" ( http://www.lexls.com/tutorials/air/accodes.html ) can someone help me on what else to check? is this due to low air pressure ? or any other A/C ECU fault ? or any other connector loose connection or faulty radiator fan ? im so worried about this. Is there any A/C repair manual ? ( since both harrier & lexus same can refer to a lexus Rx 330/ 350)