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.
| Symptom | Suspected Area | Link |
|---|---|---|
| Engine does not crank (Does not start) | Hybrid control system (for Nickel Metal Hydride Battery) | |
| Hybrid control system (for Lithium-ion Battery) | | |
| VC output circuit (ECM 5 V output) | | |
| No initial combustion (Does not start) | ECM power source circuit | |
| VC output circuit (ECM 5 V output) | | |
| Ignition system | | |
| Fuel system | | |
| Port fuel injector assembly | | |
| Direct fuel injector assembly | | |
| Fuel pump (for low pressure side) | | |
| Crankshaft position sensor | | |
| Intake system | | |
| Valve timing | | |
| EGR valve assembly | | |
| Engine cranks normally but difficult to start | ECM power source circuit | |
| Throttle body with motor assembly | | |
| Fuel pump assembly (for high pressure side) | | |
| Fuel pump (for low pressure side) | | |
| Engine coolant temperature sensor | | |
| Fuel system | | |
| Ignition system | | |
| Compression | | |
| Port fuel injector assembly | | |
| Direct fuel injector assembly | | |
| Crankshaft position sensor | | |
| Intake system | | |
| Valve timing | | |
| EGR valve assembly | | |
| Incomplete intermittent combustion occurs (Does not start) | Fuel system | |
| Fuel pump (for low pressure side) | | |
| 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 system | | |
| Low engine speed (Poor idle) | Fuel system | |
| Throttle body with motor assembly | | |
| Port fuel injector assembly | | |
| Direct fuel injector assembly | | |
| Fuel pump assembly (for high pressure side) | | |
| 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 | | |
| Air fuel ratio sensor (sensor 1) | | |
| Air fuel ratio sensor (sensor 2) | | |
| Mass air flow meter sub-assembly | | |
| Manifold absolute pressure sensor | | |
| Compression | | |
| Fuel system | | |
| Intake system | | |
| Valve timing | | |
| EGR valve assembly | | |
| Hunting (Poor idle) | Throttle body with motor assembly | |
| ECM power source circuit | | |
| Fuel system | | |
| Spark plug | | |
| Intake system | | |
| Drive start control system (for Nickel Metal Hydride Battery) | | |
| Drive start control system (for Lithium-ion Battery) | | |
| Hesitation/Poor acceleration (Poor driveability) | Port fuel injector assembly | |
| Direct fuel injector assembly | | |
| Fuel system | | |
| Fuel pump assembly (for high pressure side) | | |
| Ignition system | | |
| Intake system | | |
| Valve timing | | |
| Brake override system (for Nickel Metal Hydride Battery) | | |
| Brake override system (for Lithium-ion Battery) | | |
| Drive start control system (for Nickel Metal Hydride Battery) | | |
| Drive start control system (for Lithium-ion Battery) | | |
| Surging (Poor driveability) | Fuel system | |
| Fuel pump (for low pressure side) | | |
| Ignition system | | |
| Port fuel injector assembly | | |
| Direct fuel injector assembly | | |
| Engine stalls soon after starting | Fuel system | |
| Throttle body with motor assembly | | |
| Crankshaft position sensor | | |
| Ignition system | | |
| Fuel pump assembly (for high pressure side) | | |
| Intake system | | |
| Valve timing | | |
| EGR valve assembly | | |
| 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.) | - |
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UTILITY HINT:
With "All Readiness", you can check whether or not the DTC judgment has been completed by using the Techstream.
You should check "All Readiness" after simulating malfunction symptoms or for validation after finishing repairs.
ALL READINESS (a) Connect the Techstream to the DLC3
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