DTC U0100:00 [BECM (e-SKYACTIV)]

id300201025300

Warning

<<High voltage>>

•  If the necessary measures are not taken before servicing an electric vehicle, it could cause electrical shock and result in serious injury or, in the worst case, death. Before servicing the electric vehicle, refer to [HIGH VOLTAGE SERVICE CAUTIONS] in the general information and implement the necessary measures. (See HIGH VOLTAGE SERVICE CAUTIONS.)

Outline

System malfunction location	CAN communication system: PT-LOCAL communication error
Detection condition	•  The following conditions occur at the BECM. ―  No CAN signal for PT-LOCAL is received for 1 s. ―  A sequence counter error is detected for 1 s. ―  A check sum error is detected for 1 s. ―  Bus off is detected. ―  A CAN RAM error at the time of CAN controller initialization is detected 11 times. Precondition •  1.5 s have elapsed after main power is switched ON (READY off or on). •  Lead-acid battery voltage: 10 V or more for continuous 1.5 s
Fail-safe	•  Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [BECM (e-SKYACTIV)].)
Possible cause	•  PT-LOCAL malfunction •  Approaching vehicle audible system (AVAS) device connector or terminals malfunction •  Charge port-electrical supply unit connector or terminals malfunction •  DC-DC converter connector or terminals malfunction •  Battery charge control module connector or terminals malfunction •  PCM connector or terminals malfunction •  Common connector (C-67) connector or terminals malfunction •  Common connector (C-68) connector or terminals malfunction High voltage battery malfunction •  Internal parts malfunction

Diagnostic Procedure

Warning

<<High voltage>>

•  If necessary measures such as wearing the correct protective gear are not taken when inspecting or removing/installing the high voltage parts, it could cause electrical shock and result in serious injury or, in the worst case, death.

•  Before inspecting or removing/installing the high voltage parts, refer to [HIGH VOLTAGE SERVICE CAUTIONS] in the general information and [High Voltage Part Inspection and Removal/Installation Notes] of the high voltage system service cautions and implement the necessary measures and preparations. (See HIGH VOLTAGE SERVICE CAUTIONS.) (See HIGH VOLTAGE SYSTEM SERVICE CAUTIONS.)

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	INSPECT FOR OTHER RELATED DTCs •  Perform the DTC inspection for the BECM. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BECM (e-SKYACTIV)].)
		No	Go to the next step.
3	VERIFY APPROACHING VEHICLE AUDIBLE SYSTEM (AVAS) DEVICE DTC •  Perform the DTC inspection for the approaching vehicle audible system (AVAS) device. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [APPROACHING VEHICLE AUDIBLE SYSTEM DEVICE].)
		No	Go to the next step.
4	VERIFY DC-DC CONVERTER DTC •  Perform the DTC inspection for the DC-DC converter. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DC-DC CONVERTER (e-SKYACTIV)].)
		No	Go to the next step.
5	VERIFY BATTERY CHARGE CONTROL MODULE DTC •  Perform the DTC inspection for the battery charge control module. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [BATTERY CHARGE CONTROL MODULE (e-SKYACTIV)].)
		No	Go to the next step.
6	VERIFY PCM DTC •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (e-SKYACTIV)].)
		No	Go to the next step.
7	INSPECT APPROACHING VEHICLE AUDIBLE SYSTEM (AVAS) DEVICE 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 1.
8	INSPECT DC-DC CONVERTER CONNECTOR FOR MALFUNCTION Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  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 1.
9	INSPECT BATTERY CHARGE CONTROL MODULE CONNECTOR FOR MALFUNCTION Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  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 1.
10	INSPECT CHARGE PORT-ELECTRICAL SUPPLY UNIT 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 1.
11	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 1.
12	INSPECT COMMON CONNECTOR (C-67) 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 1.
13	INSPECT COMMON CONNECTOR (C-68) 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 1.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Perform the DTC inspection for the BECM. (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 [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the high voltage battery, then go to the next step. (See HIGH VOLTAGE BATTERY REMOVAL/INSTALLATION.)
		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.