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ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING [ET6A-EL (US)]

ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING [ET6A-EL (US)]

SM2566138


id0503n21017n5

Troubleshooting item

Engine flares up or slips when upshifting or downshifting

Description
• When shifting up while accelerating the vehicle with the accelerator pedal depressed, the engine revs.
• When shifting down while the vehicle is being driven normally with the accelerator pedal depressed, the engine revs rapidly.
Possible cause
1. Insufficient TCM learning
2. 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
VERIFY MALFUNCTION SYMPTOM
• Is the malfunction symptom at the same level compared to a vehicle of the same model (ET6A-EL vehicles)?
Yes
Symptom troubleshooting is completed.
No
Go to the next step.
2
PERFORM INITIAL LEARNING
• Perform the initial learning. (See INITIAL LEARNING [ET6A-EL (US)].)
• Does the symptom disappear?
Yes
Symptom troubleshooting is completed.
No
Go to the next step.
3
INSPECT SIGNAL PARTS FOR MALFUNCTION
• Inspect the value at the following PCM PIDs using the M-MDS. (See PID/DATA MONITOR INSPECTION.)
― APP (APP sensor)
― MAF (MAF sensor)
― ENG_RPM (CKP sensor)
• Is there any malfunction? (See PID/DATA MONITOR TABLE [PCM (SKYACTIV-G (US))].)
Yes
Repair or replace any malfunctioning parts according to the inspection result.
No
Symptom troubleshooting is completed.