Lexus ES manuals

Lexus ES: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
SFI System

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

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

Port fuel injector assembly

Direct fuel injector assembly

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)

Engine coolant temperature sensor

Fuel pump control circuit

Ignition system

Spark plug

Compression

Port fuel injector assembly

Direct fuel injector assembly

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

Port fuel injector assembly

Direct fuel injector assembly

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

Port fuel injector assembly

Direct fuel injector assembly

Fuel pump assembly (for high pressure side)

PCV hose

PCV system

Intake system

Rough idle

Flow chart [Rough idling]

Throttle body with motor assembly

Port fuel injector assembly

Direct fuel injector assembly

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)

Port fuel injector assembly

Direct fuel injector assembly

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

Port fuel injector assembly

Direct fuel injector assembly

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]

Port fuel injector assembly

Direct fuel injector assembly

Throttle body with motor assembly

ECM

Crankshaft position sensor

Ignition system

MIL (Malfunction Indicator Lamp) malfunction

MIL Circuit

Meter/Gauge system

Unable/difficult to refuel

Fuel system (canister, refueling valve, roll over valve, fuel tank, etc.)

-

Drive mode does not change

Drive mode switch circuit

Engine vibrates frequently when idling (Active control engine mount system)

Active control engine mount 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

READ NEXT:

 Terminals Of Ecm

TERMINALS OF ECM HINT: The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the termi

 Diagnosis System

DIAGNOSIS SYSTEM DESCRIPTION When troubleshooting OBD II (On-Board Diagnostics) vehicles, the Techstream (complying with SAE J1978) must be connected to the DLC3 (Data Link Connector 3) of the vehicl

 Dtc Check / Clear

DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes,

SEE MORE:

 Camshaft Position Signal Output "A" General Electrical Failure (P261401)

DESCRIPTION Refer to DTC P001001. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P261401 Camshaft Position Signal Output "A" General Electrical Failure Malfunction in rotation sensor of cam timing control motor with EDU assembly is det

 Components

COMPONENTS ILLUSTRATION *A for Power Tilt and Power Telescopic Steering Column - - *1 STEERING WHEEL SWITCH HOUSING *2 TILT AND TELESCOPIC SWITCH *3 TURN SIGNAL SWITCH *4 WINDSHIELD WIPER SWITCH ASSEMBLY

© 2016-2024 Copyright www.lexguide.net