25

Engine stalls when driving at slow speed or stopping

DESCRIPTION

• Engine stalls when the brake pedal is depressed while driving at low speed or stopping.

POSSIBLE CAUSE

• The malfunction is in the engine control system (e.g. Fuel injection control, electronic controlled throttle system). Otherwise the TCC circuit.

• TCC solenoid improper operation

• Incorrect accelerator pedal position signal

• Incorrect engine speed signal

• Incorrect brake switch signal

• Oil cooler malfunction (Foreign material mixed in ATF)

• ATF amount is low

STEP

INSPECTION

ACTION

1

• Perform the symptom troubleshooting “NO.10 LOW IDLE/STALLS DURING DECELERATION”.

  (See NO.10 LOW IDLE/STALLS DURING DECELERATION [SKYACTIV-G 2.0].)

• Is the engine control system normal?

Yes

Perform the symptom troubleshooting “NO.24 ENGINE STALLS WHEN SHIFTED TO D OR R POSITION”.

(See NO.24 ENGINE STALLS WHEN SHIFTED TO D OR R POSITION [SJ6A-EL].)

No

Repair or replace the malfunctioning part according to the inspection results.

2

• Access TCM PID SSLU_C using the M-MDS.

• Operate the TCC solenoid value by M-MDS simulation function.

• Does the TCC solenoid value operate properly?

Yes

Go to the next step.

No

Replace the control valve body.

(See CONTROL VALVE BODY REMOVAL [SJ6A-EL].)

(See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)

3

• Access the following PCM and TCM PIDs using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

  (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [TCM (SJ6A-EL)].)

PCM PIDs:

• APP

• TP_REL

• ECT

• BOO

TCM PIDs:

• TSS

• OSS

• VSS

• Are PIDs value normal?

Yes

Go to the next step.

No

Inspect and repair suspect PID related part and wiring harness.

4

• Perform the oil cooler flushing by air blow.

  (See OIL COOLER FLUSHING [SJ6A-EL].)

• Are there any foreign materials from oil cooler?

Yes

Clean the oil cooler and cooler line.

(See OIL COOLER FLUSHING [SJ6A-EL].)

No

Repair the torque converter.

(See TORQUE CONVERTER REMOVAL/INSTALLATION [SJ6A-EL].)

5

• Verify test results.

• If normal, return to the diagnostic index to service any additional symptoms.

• If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.

• If the vehicle is repaired, troubleshooting completed.

• If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION [SJ6A-EL].)