NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M RANGE [AW6AX-EL]

id0503j6802700

22

No engine braking in 1GR position of M range

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 range (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 [AW6AX-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”.
1		No	Go to the next step.
2	• Stop the engine. • Inspect following solenoids. (See SOLENOID VALVE INSPECTION [AW6AX-EL].) ― Shift solenoid A ― Shift solenoid B • Are the normal?	Yes	Inspect the ATF condition. • If large amount of metal specks are found, overhaul the transaxle and repair or replace any malfunctioning parts. (See Automatic Transaxle and Transfer Workshop Manual 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 [AW6AX-EL].)
2		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6AX-EL].)
3	• Verify test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If the malfunction remains, inspect the related Service 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.