NO.18 EXCESSIVE SHIFT SHOCK IS GIVEN WHEN UPSHIFTING AND DOWNSHIFTING [AW6A-EL, AW6AX-EL]

NO.18 EXCESSIVE SHIFT SHOCK IS GIVEN WHEN UPSHIFTING AND DOWNSHIFTING [AW6A-EL, AW6AX-EL]SM2445411

NO.18 EXCESSIVE SHIFT SHOCK IS GIVEN WHEN UPSHIFTING AND DOWNSHIFTING [AW6A-EL, AW6AX-EL]

id050310802300

18	Excessive shift shock is given when upshifting and downshifting
DESCRIPTION	• Excessive shift shock is felt when depressing the accelerator pedal at upshifting. • During cruising, excessive shift shock is felt when depressing accelerator pedal at downshifting.
POSSIBLE CAUSE	• Shift shock may worsen when the fail-safe is operating. The shift shock may worsen if the accelerator pedal position sensor, APP sensor, input/turbine speed sensor, or VSS signal malfunctions. ― Clutch slippage, burnt (C1 clutch, C2 clutch, C3 clutch, B1 brake) • Line pressure low, high • Incorrect accelerator opening signal • VSS malfunction • Input/turbine speed sensor malfunction • TFT sensor malfunction • Shift solenoid C malfunction • Shift solenoid D malfunction • Shift solenoid E malfunction • Line pressure control solenoid malfunction • TCC control solenoid malfunction • Shift solenoid F malfunction • Body GND and sensor GND malfunction • Coupler component malfunction • Control valve body malfunction ― Poor hydraulic operation (Malfunction in range change)

Diagnostic procedure

STEP	INSPECTION		ACTION
1	• Inspect for continuity between the TCM terminal A9 and battery negative terminal. • Is there continually?	Yes	Go to the next step.
1		No	Repair or replace ground circuit.
2	• Perform the PID/DATA Monitor Record Procedure and access the following PCM and TCM PIDs while excessive shift shock condition. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].) (See ON-BOARD DIAGNOSTIC SYSTEM PID/DATA MONITOR INSPECTION [AW6A-EL, AW6AX-EL].) PCM PIDs: ― APP ― TP TCM PIDs: ― SSF ― LPS ― TCCC ― TSS ― OSS • Are there normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning part according to the inspection results.
3	• Stop the engine. • Inspect the solenoid. (See SOLENOID VALVE INSPECTION [AW6A-EL, AW6AX-EL].) ― Shift solenoid C ― Shift solenoid D ― Shift solenoid E ― Line pressure control solenoid • Are there normal?	Yes	Inspect the ATF condition. If a large amount of metal specks are found: • Overhaul the transaxle. (See Automatic Transaxle and Transfer Workshop Manual AW6A-EL AW6AX-EL.) • Repair or replace the any malfunctioning parts. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].) If a large amount of metal specks are not found: • Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
3		No	Inspect the coupler component. If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
4	• Verify test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If malfunction remains, inspect the related Service Information and perform repair or diagnosis. • If vehicle is repaired, troubleshooting completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.