DTC U0115:31 [DRIVE MOTOR CONTROL MODULE (e-SKYACTIV)]

System malfunction location	CAN communication: Communication error with PCM (AT-BUS)
Detection condition	• The drive motor control module detects for the specified period of time that the drive motor control module cannot receive CAN signals from the PCM or the data length of the received CAN signal is short.
Fail-safe	• Not applicable
Possible cause	• CAN communication line malfunction between PCM and drive motor control module (AT-BUS) • PCM connector or terminals malfunction • Drive motor control module connector or terminals malfunction • PCM malfunction • Drive motor control module malfunction

System malfunction location

CAN communication: Communication error with PCM (AT-BUS)

Detection condition

• The drive motor control module detects for the specified period of time that the drive motor control module cannot receive CAN signals from the PCM or the data length of the received CAN signal is short.

Fail-safe

• Not applicable

Possible cause

• CAN communication line malfunction between PCM and drive motor control module (AT-BUS)

• PCM connector or terminals malfunction

• Drive motor control module connector or terminals malfunction

• PCM malfunction

• Drive motor control module malfunction

<<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 drive motor control module. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DRIVE MOTOR CONTROL MODULE (e-SKYACTIV)].)
No	Go to the next step.
3	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.
4	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.
5	INSPECT DRIVE MOTOR CONTROL MODULE 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. (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.
6	INSPECT DRIVE MOTOR CONTROL MODULE CAN COMMUNICATION LINE FOR SHORT OR OPEN CIRCUIT • Inspect the applicable circuit for short and open circuit. (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 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. • Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ― Switch the main power ON (READY on). • 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.

Step

Inspection

Results

Action

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.

INSPECT FOR OTHER RELATED DTCs

• Perform the DTC inspection for the drive motor control module.

(See DTC INSPECTION.)

• Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DRIVE MOTOR CONTROL MODULE (e-SKYACTIV)].)

Go to the next step.

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)].)

Go to the next step.

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.

Repair or replace the malfunctioning location and perform the repair completion verification 1.

INSPECT DRIVE MOTOR CONTROL MODULE 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.

(See CONNECTOR INSPECTION.)

• Are the connector and terminal normal?

Yes

Go to the next step.

Repair or replace the malfunctioning location and perform the repair completion verification 1.

INSPECT DRIVE MOTOR CONTROL MODULE CAN COMMUNICATION LINE FOR SHORT OR OPEN CIRCUIT

• Inspect the applicable circuit for short and open circuit.

(See CIRCUIT INSPECTION.)

• Is the circuit normal?

Yes

Go to the next step.

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.

• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.

― Switch the main power ON (READY on).

• 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.)

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.

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.

DTC troubleshooting completed.