Subaru Crosstrek Service Manual: Dtc b1574 key communication

DTC DETECTING CONDITION:

Communication failure between key and body integrated unit

CAUTION:

When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.

1.CHECK IGNITION KEY.

1) Remove the ignition key from the ignition switch.

2) Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3) Perform the Clear Memory Mode. Clear Memory Mode">

4) Read the DTC of the body integrated unit. Read Diagnostic Trouble Code (DTC)">

Is DTC B1410 detected?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1574 KEY COMMUNICATION">Go to Step 2.

Even if DTC is detected, 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.

2.CHECK IGNITION KEY.

1) Prepare a spare ignition key that is already registered.

2) Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3) Perform the Clear Memory Mode. Clear Memory Mode">

4) Read the DTC of the body integrated unit. Read Diagnostic Trouble Code (DTC)">

Is DTC B1410 detected?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1574 KEY COMMUNICATION">Go to Step 3.

Ignition key unit was defective.

3.CHECK IMMOBILIZER ANTENNA.

1) Replace the immobilizer antenna. Immobilizer Antenna">

2) Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.

3) Perform the Clear Memory Mode. Clear Memory Mode">

4) Read the DTC of the body integrated unit. Read Diagnostic Trouble Code (DTC)">

Is DTC B1410 detected?

Replace the body integrated unit. Body Integrated Unit">

Immobilizer antenna was defective.

Dtc b1572 imm circuit except antenna circuit

Dtc b1575 incorrect immobilizer key

Other materials:

Inspection
WHEEL AND TIRE SYSTEM > Tire and WheelINSPECTION1. TIRECAUTION:When replacing a tire, make sure to use tires of the same size, construction and load range as originally installed.1. Tire size and tire inflation pressure check General Description > SPECIFICATION">2. Cracks, damage and ...

Leather seat materials
The leather used by SUBARU is a high quality natural product which will retain its distinctive appearance and feel for many years with proper care. Allowing dust or road dirt to build up on the surface can cause the material to become brittle and to wear prematurely. Regular cleaning with a ...

Defogger and deicer
Rear window defogger Outside mirror defogger (if equipped) Windshield wiper deicer (if equipped) The Subaru Ascent is equipped with an integrated defogger and deicer system designed to maintain clear visibility in cold, wet, or frosty conditions. This system operates only when the ...