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DTC P1905:00 [PCM (SKYACTIV-D)]

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Outline

System malfunction location	Check connector circuit low input
Detection condition	•  A check connector voltage approx. 0 V condition continues for 16 msec.
Fail-safe	•  Not applicable
Possible cause	Note •  If the fuel injection amount learning, compulsory diesel particulate filter regeneration, timing chain learning, or engine oil data reset is performed without using the M-MDS, DTC P1905:00 may be detected by grounding the check connector (test terminal) to the body. In this case, DTC P1905:00 is automatically erased by disconnecting the check connector ground. •  DTC P1905:00 is detected and the master warning indication is displayed at the same time, however if the master warning indication is turned off by disconnecting the check connector ground, the vehicle is normal. In this case, there is no effect on the maintenance servicing. •  The purpose of DTC P1905:00 is to prevent forgetting to disconnect the check connector (test terminal) ground. •  [Vehicle system inspection] is displayed on the multi-information display. •  DTC P1905:00 is erased and [Vehicle system inspection] displayed on the multi-information display is also erased at the same time. •  Short to ground in check connector signal circuit •  PCM connector or terminal malfunction •  PCM malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
3	INSPECT PCM CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT CHECK CONNECTOR SIGNAL CIRCUIT FOR SHORT TO GROUND •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Perform the KOEO or KOER self-test. (See DTC INSPECTION.) •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.8].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.