Lexus ES: On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK FUEL PUMP OPERATION AND INSPECT FOR FUEL LEAK
(a) Check fuel pump operation.
(1) Connect the Techstream to the DLC3.
(2) Turn the engine switch on (IG).
NOTICE:
Do not start the engine.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.
Powertrain > Engine > Active Test| Tester Display |
|---|
| Activate the Circuit Relay |
(5) Check for pressure in the fuel tube sub-assembly from the fuel line. Check that sounds of fuel flowing from the fuel tank assembly can be heard. If no sounds can be heard, check the relay, fuel pump, ECM and wiring connectors.
(b) Inspect for fuel leaks.
(1) Check that there are no fuel leaks from the fuel system after doing any maintenance or repairs. If there is a fuel leak, repair or replace parts as necessary.
(c) Turn the engine switch off.
(d) Disconnect the Techstream from the DLC3.
2. CHECK FUEL PRESSURE
(a) Discharge fuel system pressure.
Click here .gif)
(b) Measure the battery voltage.
Standard Voltage:
11 to 14 V
(c) Open the cover of the EFI fuel pipe clamp and remove the EFI fuel pipe clamp from the fuel tube connector.
.png)
.png) | Open |
.png) | Pull |
| (d) Disconnect the fuel tube sub-assembly from the fuel pipe. Click here |
|
.png)
| (e) Install SST (EFI fuel pressure gauge) as shown in the illustration. SST: 09268-45101 09268-41250 09268-41260 09268-41280 09268-41500 09268-41700 95336-08070 |
|
.png)
(f) Wipe up any spilled fuel.
(g) Connect the cable to the negative (-) battery terminal.
Click here
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
Click here
(h) Connect the Techstream to the DLC3.
(i) Turn the engine switch on (IG).
NOTICE:
Do not start the engine.
(j) Turn the Techstream on.
(k) Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.
Powertrain > Engine > Active Test| Tester Display |
|---|
| Activate the Circuit Relay |
(l) Measure the fuel pressure.
Standard Fuel Pressure:
196 to 833 kPa (2.0 to 8.5 kgf/cm2, 28 to 121 psi)
- If the fuel pressure is more than the standard, replace the fuel main valve assembly.
- If the fuel pressure is less than the standard, check the fuel hoses and their connections, fuel pump and fuel main valve assembly.
(m) Disconnect the Techstream from the DLC3.
(n) Start the engine.
(o) Measure the fuel pressure at idle.
Standard Fuel Pressure:
196 to 833 kPa (2.0 to 8.5 kgf/cm2, 28 to 121 psi)
HINT:
Refer to Standard Idle Speed.
Click here
(p) Stop the engine.
(q) Check that the fuel pressure remains as specified for 5 minutes.
Standard Fuel Pressure:
98 kPa (1.0 kgf/cm2, 14.2 psi) or more
If the result is not as specified, check the fuel pump, fuel main valve assembly and/or port fuel injector assemblies.
(r) After checking the fuel pressure, disconnect the cable from the negative (-) battery terminal and carefully remove SST (EFI fuel pressure gauge) to prevent fuel from spraying.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
Click here
(s) Connect the fuel tube sub-assembly to the fuel pipe.
Click here
(t) Install the EFI fuel pipe clamp to the fuel tube connector and close the cover of the EFI fuel pipe clamp.
(u) Connect the cable to the negative (-) battery terminal.
Click here
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.
Click here
(v) Inspect for fuel leaks.
Click here
3. CHECK FUEL PRESSURE (for High Pressure)
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Coolant Temperature, Fuel Pressure (High) and Injection Mode.
Powertrain > Engine > Data List| Tester Display |
|---|
| Engine Speed |
| Coolant Temperature |
| Fuel Pressure (High) |
| Injection Mode |
(e) According to the display on the Techstream, read the Data List.
Standard:
| Techstream Display | Condition | Specified Condition |
|---|---|---|
| Fuel Pressure (High) |
| 2400 to 20000 kPag |
If the result is not as specified, check the fuel pump, fuel pump assembly, fuel pressure sensor and wire harnesses.
(f) Stop the engine.
READ NEXT:
Components
COMPONENTS ILLUSTRATION *1 NO. 1 FLOOR UNDER COVER *2 NO. 2 FLOOR UNDER COVER N*m (kgf*cm, ft.*lbf): Specified torque - - ILLUSTRATION *1 NO. 2 FUEL TANK PROTECTOR *2
Installation
INSTALLATION PROCEDURE 1. INSTALL NO. 2 FUEL TANK CUSHION (a) Install a new No. 2 fuel tank cushion to the fuel tank assembly. 2. INSTALL NO. 3 FUEL TANK CUSHION (a) Install 2 new No. 3 fuel tank cush
SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
Some Data List values may vary significantly if there are slight differences in the environment in which the vehicle is operating when measurements are obtained. Variations may also occur due to aging of the vehicle. Due to these considerations, it is not
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT NOTICE: If using a dropper to adjust the fluid amount, make sure that the dropper has not been used with mineral oils, water or deteriorated brake fluid. Sealed areas may deteriorate and lead to fluid leaks, or the fluid may deteriorate and lead to decre
