Description

LF control unit internal malfunction

Detection condition

• Start stop unit detects the LF control unit internal malfunction.

Fail-safe function

• Inhibits the door lock/unlock control using the advanced keyless entry system.

Possible cause

• LF control unit internal malfunction

• Start stop unit malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Inspect the LF control unit.

  (See LF CONTROL UNIT INSPECTION.)

• Is the LF control unit normal?

Yes

Go to the next step.

No

Replace the LF control unit, then go to the next step.

(See LF CONTROL UNIT REMOVAL/INSTALLATION.)

2

• Clear the DTC for the advanced keyless entry system using the M-MDS.

  (See CLEARING DTC [ADVANCED KEYLESS ENTRY SYSTEM].)

• Retrieve the advanced keyless entry system DTCs using the M-MDS.

  (See DTC INSPECTION [ADVANCED KEYLESS ENTRY SYSTEM].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the start stop unit.

  (See START STOP UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

3

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [ADVANCED KEYLESS ENTRY SYSTEM].)

No

DTC troubleshooting completed.