Description

Neutral switch signal mismatch

Detection condition

• Start stop unit detects that the vehicle speed changes from 0 km/h {0 mph} to 10 km/h {6.2 mph} for a continuous 5 times or more even though the neutral signal from the PCM is being received with the ignition switched ON (engine off or on).

Fail-safe function

• Perform the control with neutral switch signal turned off.

Possible cause

• DTCs are stored in the PCM.

• Neutral switch malfunction

• PCM malfunction

• Start stop unit malfunction

System wiring diagram

Not applicable

Step

Inspection

Action

1

• Retrieve the PCM DTCs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• Are any DTCs displayed?

Yes

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

(See DTC TABLE [SKYACTIV-G 2.5].)

No

Go to the next step.

2

• Inspect the neutral switch.

  (See NEUTRAL SWITCH INSPECTION [SKYACTIV-G 2.5].)

• Is the neutral switch normal?

Yes

Go to the next step.

No

Replace the neutral switch, then go to Step 4.

(See NEUTRAL SWITCH REMOVAL/INSTALLATION [C66M-R].)

3

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

  (See CLEARING DTC [START STOP UNIT].)

• Perform the following work 5 times or more.

• Drive the vehicle.

• Vehicle speed changes from 0 km/h {0 mph} to 10 km/h {6.2 mph}.

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

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

No

Go to Step 5.

4

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

  (See CLEARING DTC [START STOP UNIT].)

• Perform the following work 5 times or more.

• Drive the vehicle.

• Vehicle speed changes from 0 km/h {0 mph} to 10 km/h {6.2 mph}.

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

  (See DTC INSPECTION [START STOP UNIT].)

• 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.

5

• 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.