DTC P0C0C:00 [DRIVE MOTOR CONTROL MODULE (e-SKYACTIV)]

id300203049600

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	Drive motor control module high voltage circuit: Low voltage malfunction
Detection condition	•  The drive motor control module detects that the voltage value detected by the drive motor control module input voltage sensor in the inverter is the specified value or less. Precondition •  High voltage circuit: Operating
Fail-safe	•  Cuts off the high voltage circuit.
Possible cause	•  Poor connection of high voltage cables ―  Junction box No.3 connector or terminals malfunction ―  High voltage battery connector or terminals malfunction ―  Poor connection (poor tightening of bolts) between junction box No.3 and high voltage cables ―  Poor connection (looseness) between high voltage battery and high voltage cables •  High voltage cable malfunction ―  Open or short circuit in high voltage cables ―  Poor insulation of high voltage cables •  Short to ground at bus bar between inverter and junction box No.3 •  Poor connection at bus bar between inverter and junction box No.3 •  Junction box No.3 malfunction •  Inverter malfunction ―  Drive motor control module input voltage sensor malfunction ―  Drive motor control module malfunction High voltage battery malfunction •  High voltage battery internal circuit 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 JUNCTION BOX No.3 CONNECTOR FOR MALFUNCTION Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Remove the service plug. (See SERVICE PLUG REMOVAL/INSTALLATION.) •  After 10 min have elapsed after removing the service plug, perform a zero voltage verification at the voltage detection point of the junction box No.3 to verify that there is no electrical charge in the high voltage circuit. •  Inspect the applicable connector and terminal. •  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.
3	INSPECT THE CONNECTION CONDITION BETWEEN JUNCTION BOX No.3 AND THE HIGH VOLTAGE CABLES Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Verify that the service plug is removed. •  Inspect the tightening condition of the bolts between junction box No.3 and the high voltage cables. (See HIGH VOLTAGE CABLE REMOVAL/INSTALLATION.) •  Is the tightening condition normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
4	INSPECT THE CONNECTION CONDITION BETWEEN HIGH VOLTAGE BATTERY AND THE HIGH VOLTAGE CABLES Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Verify that the service plug is removed. •  Inspect the connection condition between the high voltage battery and high voltage cables. (See HIGH VOLTAGE CABLE REMOVAL/INSTALLATION.) •  Is the connection condition normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
5	INSPECT HIGH VOLTAGE BATTERY CONNECTOR FOR MALFUNCTION Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Verify that the service plug is removed. •  Inspect the applicable connector and terminal. •  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.
6	INSPECT HIGH VOLTAGE CABLE FOR MALFUNCTION Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Verify that the service plug is removed. •  Inspect the applicable part. (See HIGH VOLTAGE CABLE INSPECTION [(E)].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See HIGH VOLTAGE CABLE REMOVAL/INSTALLATION.)
7	CHECK FOR SHORT TO GROUND AT BUS BAR BETWEEN INVERTER AND JUNCTION BOX NO.3 Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Verify that the service plug is removed. •  Check for short to ground at the bus bar between the inverter and junction box No.3. •  Is the bus bar normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
8	CHECK CONNECTION CONDITIONS OF BUS BAR BETWEEN INVERTER AND JUNCTION BOX NO.3 Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Verify that the service plug is removed. •  Check the connection conditions of the bus bar between the inverter and junction box No.3. •  Is the tightening condition normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1.
9	INSPECT JUNCTION BOX No.3 FOR MALFUNCTION Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Inspect the applicable part. (See JUNCTION BOX No.3 INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification 1. (See JUNCTION BOX No.3 REMOVAL/INSTALLATION.)
10	INSPECT HIGH VOLTAGE BATTERY FOR MALFUNCTION DEPENDING ON REPEATABILITY Warning <<High voltage>> •  Wear insulated gloves when working on a high voltage system. •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Perform the DTC inspection for the drive motor control module. (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, replace the high voltage battery, perform the repair completion verification 1. (See HIGH VOLTAGE BATTERY REMOVAL/INSTALLATION.)
		No	Go to repair completion verification 2.
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. •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. Warning •  While performing this step, always operate the vehicle in a safe and lawful manner. •  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later. ―  Drive the vehicle under the snapshot data condition. •  Perform the DTC inspection for the drive motor control module. (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 drive motor control module, then go to the next step. (See INVERTER 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	Go to the next step.
Repair completion verification 3	VERIFY THAT NO OTHER MALFUNCTION OCCURS Warning •  While performing this step, always operate the vehicle in a safe and lawful manner. •  Drive the vehicle for 10 min or more. •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.