Lexus 2005 IS300 User Manual page 1024

5 4
Ohmmeter
Battery
5
4
2005 LEXUS IS300 (RM1140U)
SFI
(f) Connect a hand-held tester to the DLC3 (See step 1 in
check fuel pump operation (a) to (e)).
Hand- held
(g) Measure the fuel pressure.
Tester
Fuel pressure:
304 - 343 kPa (3.1 - 3.5 kgf/cm
If pressure is high, replace the fuel pressure regulator.
If pressure is low, check the fuel hoses and connections, fuel
pump, fuel filter and fuel pressure regulator.
(h) Disconnect the hand-held tester from the DLC3.
D09381
(i) Start the engine.
(j) Measure the fuel pressure at idle.
Fuel pressure:
304 - 343 kPa (3.1 - 3.5 kgf/cm
(k) Stop the engine.
(l) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.
Fuel pressure: 147 kPa (1.5 kgf/cm
If pressure is not as specified, check the fuel pump, pressure
regulator and/or injectors.
(m) After checking fuel pressure, disconnect the negative (-)
terminal cable from the battery and carefully remove SST
to prevent gasoline from splashing.
SST
(n) Reconnect the fuel inlet hose to the fuel pipe support with
2 new gaskets and the union bolt.
Torque: 29 N·m (300 kgf·cm, 21 ft·lbf)
(o) Reconnect the negative (-) terminal cable to the battery.
(p) Check for fuel leaks.
3. INSPECT FUEL PUMP
(a) Remove the rear seat cushion.
(b) Remove the 3 cap nuts and floor service hole cover.
(c) Disconnect the fuel pump & sender gauge connector.
(d) Using an ohmmeter, measure the resistance between ter-
minals 4 and 5.
Resistance: 0.2 - 3.0 Ω at 20°C (68°F)
If the resistance is not as specified, replace the fuel pump.
B01879
(e) Inspect the fuel pump operation.
Connect the positive (+) lead from the battery to terminal
4 of the connector, and the negative (-) lead to terminal
5. Check that the fuel pump operates.
NOTICE:
F
These tests must be done quickly (within 10 seconds)
to prevent the coil burning out.
F
Keep the fuel pump as far away from the battery as
possible.
B01880
F
Always do the switching at the battery side.
- FUEL PUMP
09268-45014
Author :
SF-7
2
, 44 - 50 psi)
2
, 44 - 50 psi)
2
, 21 psi) or more
Date :
1388