PROBLEM SYMPTOMS TABLE
HINT:
Symptom | Suspected Area | Link |
---|---|---|
Engine does not crank (Does not start) | Battery | |
ST relay | | |
Starter assembly | | |
Starter signal circuit | | |
Smart access system with push-button start (for start function) | | |
VC output circuit (ECM 5 V output) | | |
Park/neutral position switch assembly (for 2WD models) | | |
Park/neutral position switch assembly (for AWD models) | | |
No initial combustion (Does not start) | Immobiliser system | |
ECM power source circuit | | |
VC output circuit (ECM 5 V output) | | |
Ignition system | | |
Fuel pump control circuit | | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
Crankshaft position sensor | | |
Intake system | | |
Valve timing | | |
No. 1 valve rocker arm sub-assembly* | | |
Engine cranks normally but difficult to start | ECM power source circuit | |
Flow chart [Engine difficult to start] | | |
Throttle body with motor assembly | | |
Fuel pump assembly (for high pressure side) | | |
Fuel pump (for low pressure side)(for TMC made) | | |
Fuel pump (for low pressure side)(for TMMC made) | | |
Engine coolant temperature sensor | | |
Fuel pump control circuit | | |
Ignition system | | |
Spark plug | | |
Compression | | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
Crankshaft position sensor | | |
Intake system | | |
Valve timing | | |
No. 1 valve rocker arm sub-assembly* | | |
Incomplete intermittent combustion occurs (Does not start) | Fuel pump control circuit | |
Ignition system | | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
Crankshaft position sensor | | |
Intake system | | |
Valve timing | | |
High engine speed | Throttle body with motor assembly | |
ECM power source circuit | | |
PCV hose | | |
PCV system | | |
Low engine speed (Poor idle) | Fuel pump control circuit | |
Throttle body with motor assembly | | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
Fuel pump assembly (for high pressure side) | | |
PCV hose | | |
PCV system | | |
Intake system | | |
Rough idle | Flow chart [Rough idling] | |
Throttle body with motor assembly | | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
Fuel pump assembly (for high pressure side) | | |
Ignition system | | |
Compression | | |
Fuel pump control circuit | | |
Spark plug | | |
Intake system | | |
Valve timing | | |
No. 1 valve rocker arm sub-assembly* | | |
Hunting (Poor idle) | Throttle body with motor assembly | |
ECM power source circuit | | |
Fuel pump control circuit | | |
Spark plug | | |
Intake system | | |
Drive start control | | |
Hesitation/Poor acceleration (Poor driveability) | Fuel injector assembly (for port injection) | |
Fuel injector assembly (for direct injection) | | |
Fuel pump control circuit | | |
Fuel pump assembly (for high pressure side) | | |
Ignition system | | |
Spark plug | | |
Intake system | | |
Valve timing | | |
No. 1 valve rocker arm sub-assembly* | | |
Brake override system | | |
Drive start control | | |
Lack of power | Flow chart [Lack of power] | |
Surging (Poor driveability) | Fuel pump control circuit | |
Spark plug | | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
No. 1 valve rocker arm sub-assembly* | | |
Engine stalls soon after starting | Flow chart [Engine stalls] | |
Fuel pump control circuit | | |
Throttle body with motor assembly | | |
Crankshaft position sensor | | |
Ignition system | | |
Fuel pump assembly (for high pressure side) | | |
Intake system | | |
Valve timing | | |
Engine stalls soon after slow down | Flow chart [Engine stalls] | |
Fuel injector assembly (for port injection) | | |
Fuel injector assembly (for direct injection) | | |
Throttle body with motor assembly | | |
ECM | | |
Crankshaft position sensor | | |
Ignition system | | |
Unable/difficult to refuel | Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.) | - |
Drive mode does not change | Drive mode select switch circuit | |
HINT:
*: Check "Fuel Cut Elapsed Time" in the Data List. If the elapsed time is over 0 sec, then the engine speed is high (the engine speed at which fuel cut occurs + 500 rpm or more). In this situation, there is a possibility that a No. 1 valve rocker arm sub-assembly will become loose and malfunction, check that the No. 1 valve rocker arm sub-assemblies are properly installed.
Click here
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Rear No. 1 Seat Assembly (for 60/40 Split Seat Type Lh Side): Reassembly
REASSEMBLY CAUTION / NOTICE / HINT CAUTION: Wear protective gloves. Sharp areas on the seat frame may injure your hands. PROCEDURE 1. INSTALL REAR SEATBACK FRAME SUB-ASSEMBLY LH (a) Temporarily install the rear seatback frame sub-assembly LH to the No. 1 seat cushion frame sub-assembly LH as shown i ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Automatic Transaxle System: Shift Solenoid "B" Circuit Short to Ground (P075511)
DESCRIPTION Changing gears is performed by the ECM turning the shift solenoid valves SL1, SL2, SL3, SL4, SL5, S1 and S2 on and off. If an open or short occurs in any of the shift solenoid valve circuits, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be driven. I ...