ABNORMAL SHIFTING [FW6A-EL]

id050315101200

TROUBLESHOOTING ITEM

Abnormal shifting

DESCRIPTION

•  Shifts incorrectly (incorrect shift pattern).

POSSIBLE CAUSE

1.  Signal malfunction

―  APP sensor malfunction

―  BARO sensor malfunction

―  Brake switch malfunction

―  CKP sensor malfunction

―  ECT sensor No.1 malfunction

―  IAT sensor No.1 malfunction

―  MAF sensor malfunction

2.  Low-G (XY) sensor (built into SAS control module) malfunction

Note

•  If a tire of a different diameter from the standard tire is installed, the TCM determines that the driving mode is the AAS mode, and may change to a different shift timing from the normal timing.

TROUBLESHOOTING ITEM	Abnormal shifting
DESCRIPTION	• Shifts incorrectly (incorrect shift pattern).
POSSIBLE CAUSE	1. Signal malfunction ― APP sensor malfunction ― BARO sensor malfunction ― Brake switch malfunction ― CKP sensor malfunction ― ECT sensor No.1 malfunction ― IAT sensor No.1 malfunction ― MAF sensor malfunction 2. Low-G (XY) sensor (built into SAS control module) malfunction Note • If a tire of a different diameter from the standard tire is installed, the TCM determines that the driving mode is the AAS mode, and may change to a different shift timing from the normal timing.

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT SIGNAL PARTS FOR MALFUNCTION • Inspect the value at the following PCM PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) ― APP (APP sensor) ― BARO (BARO sensor) ― BOO (Brake switch) ― ECT (ECT sensor No.1) ― IAT (IAT sensor No.1) ― MAF (MAF sensor) ― RPM (CKP sensor) • Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
1		No	Go to the next step.
2	VERIFY IF MALFUNCTION CAUSE IS LOW-G (XY) SENSOR • Is there any malfunction?	Yes	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
2		No	Symptom troubleshooting is completed.