EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION [FW6A-EL]

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2014 - Mazda6 - Transmission/Transaxle

EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION [FW6A-EL]


TROUBLESHOOTING ITEM	Excessive shift shock from N to D or N to R position
DESCRIPTION	Strong shock is felt when shifting from N to D or N to R position at idle.
POSSIBLE CAUSE	Insufficient TCM learning (Insufficient learning in N to D position or N to R position) Not within idle speed specification Signal malfunction APP sensor malfunction CKP sensor malfunction Poor installation or worn of engine mount, suspension

CAUTION:

Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.

Related PCM PIDs


Item (definition)	Unit/Condition	Definition	Condition/Specification (Reference)
APP	%	Accelerator pedal position	Accelerator pedal released: Approx. 0% Accelerator pedal depressed: Approx. 100%
RPM	RPM	Engine speed	Displays engine speed

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

APP

Accelerator pedal position

Accelerator pedal released: Approx. 0%

Accelerator pedal depressed: Approx. 100%

RPM

Engine speed

Displays engine speed

Diagnostic procedure


STEP	INSPECTION		ACTION
1	VERIFY MALFUNCTION SYMPTOM Is the malfunction symptom (shift shock/shifting time) at the same level compared to a vehicle of the same model?	Yes	Symptom troubleshooting is completed.
1		No	Go to the next step.
2	PERFORM ON-BOARD DIAGNOSTIC TO VERIFY HYDRAULIC PRESSURE SWITCH OPERATION PRESSURE Is the operation pressure normal?	Yes	Go to the next step.
2		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
3	PERFORM INITIAL LEARNING, N TO D POSITION LEARNING, AND N TO R POSITION LEARNING Perform the Initial Learning. (See INITIAL LEARNING [FW6A-EL].) Perform N to D position learning using the following procedure: (1) The ATF temperature is 30 °C {86 °F} or more. (2) Shift the selector lever from P position to N position. (3) Shift the selector lever from N position to D position and wait for 5 s or more while holding the lever in the D position. (4) Shift the selector lever from D position to N position and wait for 5 s or more while holding the lever in the N position. (5) Perform the procedures (3) to (4) above ten times. Perform N to R position leaning using the following procedure: (1) The ATF temperature is 60 °C {140 °F} or more. (2) Shift the selector lever from P position to N position. (3) Shift the selector lever from N position to R position and wait for 5 s or more while holding the lever in the R position. (4) Shift the selector lever from R position to N position and wait for 5 s or more while holding the lever in the N position. (5) Perform the procedures (3) to (4) above ten times. Does the symptom disappear?	Yes	Symptom troubleshooting is completed.
3		No	Go to the next step.
4	INSPECT ENGINE CONTROL SYSTEM FOR MALFUNCTION Perform the symptom troubleshooting “NO.9 FAST IDLE/RUNS ON”. (See NO.9 FAST IDLE/RUNS ON [SKYACTIV-G 2.5].) Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
4		No	Go to the next step.
5	INSPECT SIGNAL PARTS FOR MALFUNCTION Inspect the value at the following PCM PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].) APP (APP sensor) RPM (CKP sensor) Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result.
5		No	Go to the next step.
6	INSPECT ENGINE MOUNT/SUSPENSION FOR POOR TIGHTENING Is there any malfunction?	Yes	Repair or replace any malfunctioning parts according to the inspection result. (See ENGINE REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
6		No	Symptom troubleshooting is completed.

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