DTC P081D:2F [START STOP UNIT]

id0902p6023000

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

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY PCM DTCs
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See DTC TABLE [SKYACTIV-D 1.5].)
(See DTC TABLE [SKYACTIV-D 2.2].)
(See DTC TABLE [MZR 1.6].)
No
Go to the next step.
2
INSPECT NEUTRAL SWITCH
•  Inspect the neutral switch.
•  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].)
(See NEUTRAL SWITCH REMOVAL/INSTALLATION [D66M-R].)
(See NEUTRAL SWITCH REMOVAL/INSTALLATION [F35M-R].)
(See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [C66M-R].)
(See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION [D66M-R].)
3
PERFORM DTC INSPECTION AND VERIFY PCM MALFUNCTION
•  Clear the DTC for the start stop unit using the M-MDS.
•  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.
•  Is the same DTC displayed?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
(See PCM REMOVAL/INSTALLATION [MZR 1.6].)
No
Go to Step 5.
4
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear the DTC for the start stop unit using the M-MDS.
•  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.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the start stop unit.
Go to the next step.
No
Go to the next step.
5
VERIFY IF OTHER DTCs DISPLAYED
•  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.