Description

Communication error with PCM (no response or data mis-match)

Detection condition

• Start stop unit detects a communication error (no response or immobilizer system cancel not possible) with the PCM.

Fail-safe

Not applicable

Possible cause

• The immobilizer system-related parts have not been programmed when replacing the PCM or start stop unit.

• Start stop unit malfunction

• PCM malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Perform the start stop unit replacement and programming due to simultaneous replacement of start stop unit/PCM.

  (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING.)

—

Go to the next step.

2

• Clear the DTC for the start stop unit using the M-MDS.

  (See CLEARING DTC [START STOP UNIT].)

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Is the security indicator light: 16, DTC U0100:87/P1260:00 displayed?

Yes

Replace the start stop unit and perform Step 2 again.

(See START STOP UNIT REMOVAL/INSTALLATION.)

• If the malfunction recurs, replace the PCM, then go to the next step.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

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 [START STOP UNIT].)

No

DTC troubleshooting completed.