Lexus NX: Inspection

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (fuel) / Fuel Injector / Inspection

INSPECTION

PROCEDURE

1. INSPECT FUEL INJECTOR ASSEMBLY

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	11.6 to 12.4 Ω

If the result is not as specified, replace the fuel injector assembly.

(b) Inspect the injector injection volume.

CAUTION:

Keep the injector away from sparks during the test.

(1) Remove the No. 1 fuel pipe clamp from the fuel tube sub-assembly.

(2) Disconnect the fuel tube sub-assembly from the fuel pipe.

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(3) Connect SST (fuel tube connector) to SST (hose) with SST (hose band), and then connect them to the fuel pipe (vehicle side).

SST: 09268-31014

09268-41700

95336-08070

SST: 09268-00010

09268-00030

*a	SST (Hose)
*b	SST (Hose Band)
*c	SST (Fuel Tube Connector)
*d	Fuel Pipe (Vehicle Side)

(4) Install the O-ring to the fuel injector assembly.

(5) Connect SST (adapter and hose) to the fuel injector assembly, and hold the fuel injector assembly and union with SST (hose band).

SST: 09268-31014

09268-41110

09268-41300

09268-41700

95336-08070

*1	O-Ring
*a	SST (Hose)
*b	SST (Hose Band)
*c	SST (Adapter)
*d	SST (Clamp)
*e	Vinyl Tube

(6) Pass SST (tie band) through the loop on the handle of SST (clamp) to secure SST (clamp) to SST (adapter) as shown in the illustration.

SST: 09268-31014

09268-41800

NOTICE:

As SST (tie band) does not completely prevent SST (clamp) from becoming loose, do not subject the parts to any impacts while using them.
Before using SST (tie band), make sure that there is no deterioration, damage or cracks. If there are any abnormalities, replace SST.

HINT:

When removing SST (tie band), disengage the lock clamps.

*a	SST (Tie Band)
*b	Lock

(7) Check that SST (clamp) and SST (adapter) cannot be easily separated.

(8) Install a vinyl tube to the fuel injector assembly.

NOTICE:

Install a suitable vinyl tube to the fuel injector assembly to contain any gasoline spray.

(9) Put the fuel injector assembly into a graduated cylinder.

(10) Operate the fuel pump.

(11) Connect SST (EFI inspection wire H) to the fuel injector assembly and the battery for 15 seconds and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.

*a	SST (EFI Inspection Wire H)
	Connect

SST: 09842-30080

Standard Injection Volume:

87 to 105 cc (5.3 to 6.4 cu. in.) every 15 seconds

Difference between each fuel injector assembly:

18 cc (1.1 cu. in.) or less

If the result is not as specified, replace the fuel injector assembly.

NOTICE:

Make sure that SST (EFI inspection wire H) is securely connected.
Always do the switching at the battery side.

(1) In the condition above, disconnect the tester probes of SST (EFI inspection wire H) from the battery and check for fuel drop from the fuel injector assembly.

Standard fuel drop:

1 drop or less per 20 minutes

If fuel drop is not as specified, replace the fuel injector assembly.

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Lexus NX: Inspection

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