Lexus

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This guide is for problems that have occurred on Lexus vehicles and the fixes used. This guide should not be an answer but more help for proper diagnostic.

2002[edit | edit source]

ES300 2002[edit | edit source]
Problem Solution

Hum or rev noise when running vehicle

Information about problem: When listening from outside vehicle noise not herd. Inside vehicle noise is herd from body.

Possible areas of problem: With stethoscope listen to fuel pressure damper set (on fuel rail). If pulsation is herd suspect damper

Solution found: Fuel Pressure Pulsation Damper Assy was the problem

2007[edit | edit source]

ES350 2007[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Code P0606 ECM / PCM Processor

(usually not ECM may be exhaust leak or bad O2

Check for any exhaust leak. With scan tool check monitor and see if O2 have failed any test. Check scan data for any irregular O2 impedance levels. O2 sensor impedance was very high and didn't move also failed monitor test. Change O2 impedance started to move.
IS350 2007[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
(only with VDIM check VDIM 3 connector skid control ECU under glove box)


Intermittent C1249 open in stop light switch

intermittent C1249 open in stop light switch Stop light switch.

1. Check stop SW fuse (7.5 A) under glove box check brake operation with lights and computer

2. Check brake light (pin 1 and 2 bigger pins) Not pushed (below 1 ohm) pushed 10 kΩ or higher OL (when testing make sure only below 1 {ohm}} or higher then 10 kΩ any number in between call the switch)

Bad Stop light switch

2008[edit | edit source]

GS450h 2008[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Doors can lock by key and inside but all door touch sensors inoperative


Second key in trunk check for second key


Found second key in bag in truck
LS460 2008[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
One side headlight out


Checked and HID bulbs are good power problem Check voltage at fuse block by engine 15 A fuse marked H–LP RL, 15 A fuse H-LP LL (make sure fuse is good) If no voltage found at same side headlight check failing.


Remove Cover by fuses should have pins. (17 pin and 10 pin.

on the 17 pin #1 is closest to the 10 pin set)


Pin #1 should have 12 V always with headlights on.


Pin #5 goes to H-LP RL - should have 12 V if not suspect relay block.


Pin#6 goes to H-LP LL should have 12 V if not suspect relay block


found no 12 V at pins replaced relay block.

2008[edit | edit source]

RX400h[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Thumping sound when using brakes and while holding brakes firm. Can be felt and heard You can feel the ABS unity actuator assembly making the noise Actuator assembly Switched out ABS actuator assembly. Problem went away.

2009[edit | edit source]

RX350 2009[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Droning noise when driving vehicle at 35 mph also can feel in steering wheel Around 35 mph droning feeling and noise. When turning steering wheel slowly can feel it get worse Check for feathering if no feathering on tires suspect wheel bearings Replaced wheel bearings (front) When one is replaced listen to the difference between the old and new should make no sound.
SC340 2009[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Seat memory Inoperative 1. Using seat slide button slide seat all the way forward

2. Using seat recline tilt seat all the way forward beep should sound

3. Seat should be operational

seat needs proper program Proper seat calibration.

2010[edit | edit source]

RX350 2010[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
After changing radio traction light and check engine come on after driving 15mph and a short distance Radio may be faulty Using scan tool connect and check that speed on etc. is correct if not probably radio Swapped radio with old one and etc. showed speed
Rear hatch door can go up but will long beep when pressing button to go down May have come from body shop Check rear door data list. Look for PBD Touch Sensor L or R if one says open may be unplugged. Note: connector on lower part of door and screws are needed to be removed don't just pull Found open on left side connector not plugged in. connected. Sensor now work properly 1/7/15

2011[edit | edit source]

IS250 2011[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
no gauge lights, no start, no key on, door locks work, lights work, main fuse good, other fuses good Power source control ECU Search for power source mode. Bypass PCE to check gauge lights by jumping power to pin 35 light green wire going to IG-2 relay, key should power on. Found power source ECU to be bad. (IMG 1). looks like bad ECU part

2013[edit | edit source]

GS350 2013[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Squeak noise from turning steering wheel Was done slowly and about 2 inch movements left and right Suspect clock spring. Removed steering wheel and clock spring replaced steering wheel with no clock spring sound went away Clock spring. Steering wheel bolt is 37 lb-ft
IS250 2013[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Multi display shows message after key on or vehicle start “check headlight system” No codes, will keep popping up on gauge cluster gauges Rear high adjuster. Misplaced. Arm can be installed 180° off and will cause an error. Check picture below for how it is suppose to be installed upward Turned arm 180° and aligned with middle mark. Light turned off. see image below
Is250 heigh adjuster.jpg




RX350 2013[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
When turning left and right squeak no Boot squeaking by pulling on boot and noise going away Lower steering boot Lubed with rubber grease noise went away
Vehicle not starting after changing steering column Cranking but not starting. New steering column has included ECU Id ECU not connecting Using scan tool go to SMART ACCESS LIVE – UTILITY – ECU COMMUNICATION ID REGISTRATION. PERFORM

2014[edit | edit source]

ES350 2014[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
All glass moon roof doesn't slide closed without holding button This is normal operation This is normal operation Normal operation. Need to hold button to close
IS250 2014[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
information gauge says clean sensors Sensors are clean. Techstream to intuitive p/a look for sensor that says freeze. (Not detected is fine) swap and see problem move. Sensor (front sensors can be reached from top of engine bay
IS350 2014[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Black screen after ACC ON, disconnecting and reconnecting Bluetooth device, manually disabling Bluetooth from the handset results in inability of head unit to reconnect. TSB L-SB-0024-14 Re-flash with USB 02023-DENSO-14B
RX350 2014[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
When turning has to be engaged creaking/groaning noise from steering column Steering boot Checked boot around intermediate shaft. Removed clamp lift up boot. Feel shaft should feel gritty Spray lube doesn't work. Clean shaft with brake clean. Apply silicone non spray. Possibly sil-glide will work. Reinstalled all. check

2015[edit | edit source]

ES350 2015[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Radio wont show station changing when turning tuning knob Update for the radio Check for radio update Updated radio. Worked properly
GS350 2015[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Clicking noise from front sounds like brake rubbing (when taking turn may sound rotational) Happens more often when turning the direction opposite of problem side. But check to make sure Wheel bearing Wheel bearing changed test drove no noise 2/26/16

(2wd) HUB 51 lb-ft caliper 100 lb-ft

IS250 2015[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
When moving temp from hot to cold or cold to hot (passenger side). Rubbing noise can be heard from passenger side behind glove box Blend door is binding If able to remove lower servo check the doors (make sure that the collard is checked is also a door) Found door moved by collard to be binding at a specific temp. Lubricated and noise when away. Changed EVAP case.
LX570 2015[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Display shows “System initializing” on all cameras Usually happens after short pin was placed in vehicle No lines show up that move with steering wheel for parking assist Put vehicle in reverse. Turn steering wheel from lock to lock needs to be done fast
NX 2015[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
No fuel flowing out of fuel port checked and no fuel was flowing out Changed pump, fuel filter still no fuel. Changed fuel sock filter. Possibly fuel tank contamination too. Found fuel pump in tank propeller blinding

2016[edit | edit source]

RX350 2016[edit | edit source]
Problem Description Information about problem Possible areas of problem solution found
Clicking noise when turning and going over bumps. Can hear from just behind seat. Panel assembly, rear seat sub floor lower bolts 14 mm might be loose. Check lower bolts for looseness. Tightened bolts to 25 lb-ft noise when went away.