Subaru Crosstrek Service Manual: Dtc b2271 ign relay control circuit

DTC detecting condition:

• When malfunction is detected in IG1 and IG2 drive circuits in the keyless access CM.

• When malfunction is detected in IG hold circuit in the keyless access CM.

For replacement procedure of keyless access CM, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1.CHECK LAN SYSTEM.

Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE">

Is LAN system normal?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 2.

Perform the inspection according to the diagnosis for LAN system.

2.CHECK FUSE.

Check the fuse. Relay and Fuse">

Is the fuse OK?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 3.

Replace the fuse. When the replaced fuse is blown immediately, check the power supply circuit for short-circuited.

3.CHECK HARNESS.

1) Disconnect the keyless access CM connector.

2) Using a tester, measure the voltage between the keyless access CM connector and chassis ground.

Connector & terminal

(B572) No. 2 (+) — Chassis ground (−):

Is the voltage 9.5 — 16 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 4.

Check the power supply circuit.

4.CHECK HARNESS.

Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(B572) No. 11 — Chassis ground:

Is the resistance less than 1 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 5.

Repair or replace the open circuit of harness.

5.CHECK HARNESS.

1) Disconnect the keyless access CM connector.

2) Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(B572) No. 9 — Chassis ground:

Is resistance 74.15 — 460.88 ?? (20°C)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 6.

Check IG relay 2. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 7.

6.CHECK HARNESS.

1) Disconnect the keyless access CM connector.

2) Using a tester, measure the resistance between the keyless access CM connector and chassis ground.

Connector & terminal

(B574) No. 6 — Chassis ground:

Is resistance 50.87 — 72.17 ?? (20°C)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 8.

Check IG relay 1. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 7.

7.CHECK RELAY.

Perform unit inspection of IG relay 1 and IG relay 2. Relay and Fuse > INSPECTION">

Is the relay OK?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2271 IGN RELAY CONTROL CIRCUIT">Go to Step 8.

Replace the relay. IG Relay1 (Push Button Start) > REMOVAL"> IG Relay2 (Push Button Start) > REMOVAL">

8.CHECK KEYLESS ACCESS CM.

1) Connect the keyless access CM connector.

2) Using a tester, measure the voltage between the terminals of keyless access CM connector.

Connector & terminal

(B574) No. 6 (+) — Chassis ground (−):
(B572) No. 9 (+) — Chassis ground (−):

Is the voltage 1 V or less > 9.5 — 16 V when ACC > IGN ON?

Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

Replace the keyless access CM. Keyless Access CM > REMOVAL">

Dtc b1242 wireless tuner

Dtc b2274 acc relay control circuit

Other materials:

Electrical component location Location
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Electrical Component LocationLOCATION1. CONTROL MODULE(1)Transmission control module (TCM)(3)AWD light(5)Body integrated unit(2)AT OIL TEMP light(4)Engine control module (ECM)(6)Data link connector2. SENSOR(1)Secondary speed sensor(3)Primary spee ...

Abs warning light does not go off
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Warning Light Illumination PatternABS WARNING LIGHT DOES NOT GO OFFDetecting condition:• Defective combination meter• Defective CAN communicationTrouble symptom:ABS warning light does not go off when starting the engine.STEPCHECKYESNO1.RE ...

Illumination brightness control
In the Subaru Ascent, the brightness level of the combination meter and the center information display is automatically reduced under specific lighting conditions to ensure optimal visibility and reduce glare for the driver. When the light switch is set to the " " or " ...