Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Fuel injector circuit

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostics for Engine Starting Failure

FUEL INJECTOR CIRCUIT

CAUTION:

Check or repair only faulty parts.

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > PROCEDURE">.

WIRING DIAGRAM:

Engine electrical system Engine Electrical System">

STEPCHECKYESNO

1.CHECK OPERATION OF EACH FUEL INJECTOR.

While cranking the engine, check each fuel injector emits operating sound. Use a sound scope or attach a screwdriver to the injector to listen to sounds for this check.

Does the fuel injector emit operating sound?

Check the fuel pressure. Fuel Pressure > INSPECTION">

Diagnostics for Engine Starting Failure > FUEL INJECTOR CIRCUIT">Go to Step 2.

2.CHECK POWER SUPPLY TO EACH FUEL INJECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from fuel injector.

3) Turn the ignition switch to ON.

4) Measure the power supply voltage between fuel injector terminal and engine ground.

Connector & terminal

#1 (E5) No. 2 (+) — Engine ground (−):

#2 (E16) No. 2 (+) — Engine ground (−):

#3 (E6) No. 2 (+) — Engine ground (−):

#4 (E17) No. 2 (+) — Engine ground (−):

Is the voltage 10 V or more?

Diagnostics for Engine Starting Failure > FUEL INJECTOR CIRCUIT">Go to Step 3.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in harness between main relay connector and fuel injector connector

Poor contact of main relay connector

Poor contact of coupling connector

3.CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from ECM.

3) Measure the resistance of harness between ECM connector and fuel injector connector.

Connector & terminal

#1 (B134) No. 12 — (E5) No. 1:

#2 (B134) No. 22 — (E16) No. 1:

#3 (B134) No. 32 — (E6) No. 1:

#4 (B134) No. 13 — (E17) No. 1:

Is the resistance less than 1 ??

Diagnostics for Engine Starting Failure > FUEL INJECTOR CIRCUIT">Go to Step 4.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in harness between ECM connector and fuel injector connector

Poor contact of coupling connector

4.CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR CONNECTOR.

Measure the resistance between ECM connector and chassis ground.

Connector & terminal

#1 (B134) No. 12 — Chassis ground:

#2 (B134) No. 22 — Chassis ground:

#3 (B134) No. 32 — Chassis ground:

#4 (B134) No. 13 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostics for Engine Starting Failure > FUEL INJECTOR CIRCUIT">Go to Step 5.

Repair the short circuit to ground in harness between ECM connector and fuel injector connector.

5.CHECK EACH FUEL INJECTOR.

Measure the resistance between each fuel injector terminals.

Terminals

No. 1 — No. 2:

Is the resistance 5 — 20 ??

Diagnostics for Engine Starting Failure > FUEL INJECTOR CIRCUIT">Go to Step 6.

Replace the faulty fuel injector. Fuel Injector">

6.CHECK FOR POOR CONTACT.

Check for poor contact of ECM connector.

Is there poor contact of ECM connector?

Repair the poor contact of ECM connector.

Inspection using “General Diagnostic Table” General Diagnostic Table > INSPECTION">

Fuel pump circuit
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostics for Engine Starting FailureFUEL PUMP CIRCUITCAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION&q ...

General description
...

Other materials:

Removal
MECHANICAL(H4DO) > Engine AssemblyREMOVAL1. Open the front hood, and make alignment marks (A) on both the front hood and the front hood striker by using a marker pen.2. Remove the front hood striker from the front hood.3. Change the front hood stay position from (A) to (B), and completely open th ...

Inspection
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO) > Purge Control Solenoid ValveINSPECTION1. PURGE CONTROL SOLENOID VALVE1. Check that the purge control solenoid valve has no deformation, cracks or other damages.2. Measure the resistance between the purge control solenoid valve terminals.Ter ...

Electrical component location Location
KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Electrical Component LocationLOCATION(1)Keyless access CM(8)Push button ignition switch(15)Rear interior antenna(2)Mechanical key(9)Steering lock CM(16)Rear gate opener button(3)Access key(10)TCM(17)Rear lock button(4)Front outer handle ...

© 2016-2023 Copyright www.sucross.com