DTC P24F1:00 [BECM (e-SKYACTIV)]

System malfunction location	PCM start signal system: Stuck on
Detection condition	• The BECM receives a PCM operation on signal from the PCM for 3 s even though the BECM turns off the PCM operation signal.
Fail-safe	• Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [BECM (e-SKYACTIV)].)
Possible cause	• PCM connector or terminals malfunction • Common connector (C-67) connector or terminals malfunction • Short to power supply in PCM start signal circuit • PCM malfunction High voltage battery malfunction • Internal parts malfunction

System malfunction location

PCM start signal system: Stuck on

Detection condition

• The BECM receives a PCM operation on signal from the PCM for 3 s even though the BECM turns off the PCM operation signal.

Fail-safe

• Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [BECM (e-SKYACTIV)].)

Possible cause

• PCM connector or terminals malfunction

• Common connector (C-67) connector or terminals malfunction

• Short to power supply in PCM start signal circuit

• PCM malfunction

High voltage battery malfunction

• Internal parts 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 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.
3	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.
4	INSPECT PCM START SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (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.
5	INSPECT PCM FOR MALFUNCTION DEPENDING ON REPEATABILITY • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Switch the main power ON (READY off or on) and wait for 20 s or more. • 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, replace the PCM, perform the repair completion verification 1. (See PCM REMOVAL/INSTALLATION.)
No	Go to repair completion verification 2.
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.) • Switch the main power ON (READY off or on) and wait for 20 s or more. • 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.

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 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 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.

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

INSPECT PCM START SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

• Inspect the applicable circuit for a short to power supply.

(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.

INSPECT PCM FOR MALFUNCTION DEPENDING ON REPEATABILITY

• Install/connect the part removed/disconnected during the troubleshooting procedure.

• Clear the DTC recorded in the memory.

(See CLEARING DTC.)

• Switch the main power ON (READY off or on) and wait for 20 s or more.

• 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, replace the PCM, perform the repair completion verification 1.

(See PCM REMOVAL/INSTALLATION.)

Go to repair completion verification 2.

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.)

• Switch the main power ON (READY off or on) and wait for 20 s or more.

• 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.)

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.

DTC troubleshooting completed.