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LOW MAXIMUM SPEED AND POOR ACCELERATION [ET6A-EL, ET6AX-EL (E)]

id0503n61009n8

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

System wiring diagram

•  Not applicable

Connector diagram

•  Not applicable

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
System wiring diagram	• Not applicable
Connector diagram	• Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT ENGINE CONTROL SYSTEM FOR MALFUNCTION

•  Perform the symptom troubleshooting “LACK/LOSS OF POWER-ACCELERATION/CRUISE”.
(See LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-G (E)].)

(See LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-X].)

(See LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-D].)

•  Is there any malfunction?

Yes

Repair or replace any malfunctioning parts according to the inspection result.

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 PID/DATA MONITOR INSPECTION.)

―  APP1 (APP sensor No.1)

―  APP2 (APP sensor No.2)

―  MAF (MAF sensor)

―  ENG_RPM (CKP sensor)

•  Is there any malfunction?
(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (E))].)

(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].)

(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-D)].)

Yes

Repair or replace any malfunctioning parts according to the inspection result.

No

Explain to the customer that the vehicle is not malfunctioning and they should keep an eye on it.

Step	Inspection	Results	Action
1	INSPECT ENGINE CONTROL SYSTEM FOR MALFUNCTION • Perform the symptom troubleshooting “LACK/LOSS OF POWER-ACCELERATION/CRUISE”. (See LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-G (E)].) (See LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-X].) (See LACK/LOSS OF POWER-ACCELERATION/CRUISE [SKYACTIV-D].) • 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 PID/DATA MONITOR INSPECTION.) ― APP1 (APP sensor No.1) ― APP2 (APP sensor No.2) ― MAF (MAF sensor) ― ENG_RPM (CKP sensor) • Is there any malfunction? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (E))].) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].) (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-D)].)	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.