FREQUENT SHIFTING [FW6A-EL]

id050315101300

TROUBLESHOOTING ITEM

Frequent shifting

DESCRIPTION

•  Downshifting occurs suddenly even when accelerator pedal is depressed slightly in D position.

POSSIBLE CAUSE

1.  Signal malfunction

―  APP sensor malfunction

2.  Poor GND

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

TROUBLESHOOTING ITEM	Frequent shifting
DESCRIPTION	• Downshifting occurs suddenly even when accelerator pedal is depressed slightly in D position.
POSSIBLE CAUSE	1. Signal malfunction ― APP sensor malfunction 2. Poor GND 3. Low-G (XY) sensor (built into SAS control module) malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	INSPECT SIGNAL PARTS FOR MALFUNCTION • Inspect the value at the following PCM PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0].) ― APP (APP sensor) • Is there any malfunction? (See PCM INSPECTION [SKYACTIV-G 2.0].)	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 TCM GND OR LOW-G (XY) SENSOR • Switch the ignition to off. • Disconnect the TCM connector. • Visually inspect for pin deformity, open circuit, or wiring harness non-insulation between TCM terminal 1B and body GND. • Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		No	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)