Subaru Crosstrek Service Manual: Dtc b1571 reference code incompatibility (immobilizer cm to ecm)
KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)
DTC detecting condition:
Incompatibility of reference code between keyless access CM (model without ID code box) or ID code box (model with ID code box) and ECM occurs.
Trouble symptom:
Engine will not start.
| STEP | CHECK | YES | NO |
1.CHECK ECM.
Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.
Is ECM registration finished? And does the engine start?
ECM registration was not performed properly.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1571 REFERENCE CODE INCOMPATIBILITY (IMMOBILIZER CM TO ECM)">Go to Step 2.
2.REPLACE ECM.
1) Install the ECM from other normal operating vehicle (with push button start) which use same ECM to the vehicle to be diagnosed.
2) Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.
Is ECM registration finished? And does the engine start?
Replace the ECM. Engine Control Module (ECM) > REMOVAL"> Install the ECM from other vehicle to the original vehicle.
Replace Keyless access CM (model without ID code box), Keyless Access CM"> or replace ID code box (model with ID code box). ID Code Box">
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Other materials:
Unlocking
Perform steps 1 to 5 described in "Registration".
NOTE
You cannot unlock by PIN Code
Access in the following cases.
when the access key is within the
operating ranges
when the ignition switch is in the
"ACC" or "ON" position
If you make an operation error
during the unlocking proced ...
Keyless access setting (models with "keyless access with pushbutton start
system")
Preparation for keyless access settings
1. Perform the preparation steps according
to "Preparation for car settings"
2. Operate the " " or "
" switch to
select the "Keyless Access Setting" item.
Then push the button.
Driver's door unlock setting
1. Perform the preparatio ...
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