NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M POSITION [AY6A-EL, AY6AX-EL]

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22 | No engine braking in 1GR position of M position
DESCRIPTION | • Engine speed drops to idle but the vehicle coasts when the accelerator pedal is released during cruising at medium to high speeds. • Engine speed drops to idle but the vehicle coasts when accelerator pedal is released when in M position (1GR) at low vehicle speed.
POSSIBLE CAUSE | • Clutch slippage, burnt (B2 brake) ― Line pressure low • VSS malfunction • Input/turbine speed sensor malfunction • Shift solenoid A or B malfunction • Sensor ground malfunction • Control valve body malfunction Note • Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See BASIC INSPECTION [AY6A-EL, AY6AX-EL].)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Do the following symptoms occur concurrently? ― Engine flares up or slips during acceleration ― Engine flares up or slips when shifting | Yes | Go to No.14 “ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING”, or No.15 “ENGINE FLARES UP OR SLIPS WHEN ACCELERATING VEHICLE”.
No | Go to the next step.
2 | • Stop the engine. • Inspect following solenoids. ― Shift solenoid A (See SHIFT SOLENOID A INSPECTION [AY6A-EL, AY6AX-EL].) ― Shift solenoid B (See SHIFT SOLENOID B INSPECTION [AY6A-EL, AY6AX-EL].) • Are the normal? | Yes | Inspect the ATF condition. If large amount of metal specks are found, replace the transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].) If a large amount of metal specks are not found, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
No | Inspect the coupler component. If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AY6A-EL, AY6AX-EL].)
3 | • Verify test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. • If the vehicle is repaired, troubleshooting completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.