EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC) [GW6A-EL, GW6AX-EL] - MAZDA CX-9 TC 2016

EXCESSIVE SHIFT SHOCK ON TORQUE CONVERTER CLUTCH (TCC) [GW6A-EL, GW6AX-EL]

id050320102200

TROUBLESHOOTING ITEM	Excessive shift shock on torque converter clutch (TCC)
DESCRIPTION	• Strong shock is felt when TCC is engaged.
POSSIBLE CAUSE	1. Insufficient TCM learning (Insufficient TCC learning) 2. Signal malfunction ? APP sensor malfunction ? CKP sensor malfunction 3. Torque converter malfunction 4. Engine control system malfunction

Diagnostic procedure

Note

• If a DTC is stored in the PCM, the malfunction may be resolved by repairing the malfunctioning location.

STEP	INSPECTION		ACTION
1	PERFORM INITIAL LEARNING AND TCC LEARNING Perform the initial learning. (See INITIAL LEARNING [GW6A-EL, GW6AX-EL].) Perform TCC learning using the following procedure: (1) The ATF temperature is 20 °C {68 °F} or more. (2) Constantly maintain the accelerator pedal opening angle between 20% to 60%. (3) Accelerate the vehicle from a stop to 1st gear and from 1st to 2nd gear. (4) Perform the shifting above (3) ten times. • Does the symptom disappear?	Yes	Symptom troubleshooting is completed.
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) ? RPM (CKP sensor) • Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
2		No	Replace the automatic transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [GW6A-EL].) (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [GW6AX-EL].)