DTC P081D:29 [START STOP UNIT]

id0902p6022900

Description

Neutral switch error signal received

Detection condition

•  Start stop unit receives the neutral switch signal error signal from the PCM for 1 min or more 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

Description	Neutral switch error signal received
Detection condition	• Start stop unit receives the neutral switch signal error signal from the PCM for 1 min or more 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. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) (See ON-BOARD DIAGNOSTIC TEST [MZR 1.6].) • 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].)
1		No	Go to the next step.
2	INSPECT NEUTRAL SWITCH • Inspect the neutral switch. (See NEUTRAL SWITCH INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEUTRAL SWITCH INSPECTION [SKYACTIV-D 1.5].) (See NEUTRAL SWITCH INSPECTION [SKYACTIV-D 2.2].) (See NEUTRAL SWITCH INSPECTION [MZR 1.6].) • Is the neutral switch normal?	Yes	Go to the next step.
2		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. (See CLEARING DTC [START STOP UNIT].) • Switch the ignition ON (engine off or on) and wait for 1 min or more. • 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 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].)
3		No	Go to Step 5.
4	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT].) • Switch the ignition ON (engine off or on) and wait for 1 min or more. • 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.
4		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].)
5		No	DTC troubleshooting completed.