LOW MAXIMUM SPEED AND POOR ACCELERATION [GW6A-EL, GW6AX-EL]

id050320100900

TROUBLESHOOTING ITEM	Low maximum speed and poor acceleration
DESCRIPTION	• Vehicle acceleration is poor at start. • Delayed acceleration when accelerator pedal is depressed while driving.
POSSIBLE CAUSE	• Engine control system malfunction • Signal malfunction ? APP sensor malfunction ? CKP sensor malfunction ? MAF sensor malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT ENGINE CONTROL SYSTEM FOR MALFUNCTION • Perform the symptom troubleshooting “NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE”. (See NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-G 2.5T].) • Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
1		No	Go to the next step.
2	INSPECT SIGNAL PARTS FOR MALFUNCTION • Inspect the value at the following PCM PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) ? APP (APP sensor) ? MAF (MAF sensor) ? RPM (CKP sensor) • Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		No	Explain to the customer that the vehicle is not malfunctioning and they should keep an eye on it.