Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GNKC
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 -           ]
Title: 2ZR-FXE (FUEL): FUEL INJECTOR: INSPECTION; 2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]

INSPECTION

PROCEDURE

1. INSPECT FUEL INJECTOR ASSEMBLY

(a) Check the resistance.

(1) 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.

*a

Component without harness connected

(Fuel Injector Assembly)

(b) Check the operation.

CAUTION:

Perform the inspection in a well-ventilated area.

Do not perform the inspection near an open flame.

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

SST: 09268-00010

09268-00030

SST: 09268-31015

09268-41700

95336-08070

NOTICE:

Make sure the SST (fuel tube connector) O-rings are not damaged and are free of foreign matter as they are used to seal the connections between SST (fuel tube connector) and the fuel pipe (vehicle side).

*a

SST (Hose)

*b

SST (Hose Band)

*c

SST (Fuel Tube Connector)

*d

Fuel Pipe (Vehicle Side)

(2) Apply a light coat of gasoline to a new O-ring, and then install the O-ring to the fuel injector assembly.

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

SST: 09268-31015

09268-41110

09268-41410

09268-41700

95336-08070

*1

O-ring

*a

SST (Hose)

*b

SST (Hose Band)

*c

SST (Adapter)

*d

SST (Clamp)

*e

Vinyl Tube

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

CAUTION:

Install a suitable vinyl tube to the fuel injector assembly to prevent fuel from spraying.

(5) Tie SST (clamp) and SST (adapter) together with SST (tie band) as shown in the illustration.

SST: 09268-31015

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 wear, damage or cracks. If there are any abnormalities, replace SST (tie band).

HINT:

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

*a

Lock

*b

SST (Tie Band)

*c

SST (Adapter)

*d

SST (Clamp)

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

(7) Set the fuel injector assembly in a graduated cylinder.

(8) Connect the Techstream to the DLC3.

(9) Turn the ignition switch to ON.

NOTICE:

Do not start the engine.

(10) Turn the Techstream on.

(11) Enter the following menus: Powertrain / Engine / Active Test / Activate the Circuit Relay.

Powertrain > Engine > Active Test

Tester Display

Activate the Circuit Relay

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

SST: 09842-30080

Standard Injection Volume:

Auxiliary Battery Connection

Condition

Specified Condition

Positive (+) auxiliary battery terminal - Negative (-) auxiliary battery terminal

Per 15 seconds

60 to 73 cc (3.7 to 4.5 cu. in.)

Difference between Each Fuel Injector Assembly:

13 cc (0.8 cu. in.) or less

NOTICE:

  • Make sure that SST (EFI inspection wire H) is securely connected.
  • Always switch the voltage on and off at the auxiliary battery side, not the fuel injector assembly side.

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

*a

SST (EFI Inspection Wire H)

(c) Check for leaks.

(1) Disconnect SST (EFI inspection wire H) from the auxiliary battery and check for fuel leaks from the fuel injector assembly.

Standard Fuel Drop:

1 drop or less per 20 minutes

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