NO.22 NO ENGINE BRAKING [SJ6A-EL]


22	No engine braking
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 (C4 clutch/B1 brake/B2 brake/B4 brake) - Line pressure low • VSS malfunction • Improper signal from PCM (engine speed, accelerator pedal position, throttle position, engine coolant temperature, engine torque signals) • Line pressure control solenoid malfunction • Control valve body malfunction Note • Before following the troubleshooting steps, make sure that the Automatic Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection are conducted. (See BASIC INSPECTION [SJ6A-EL].)


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	• Access the following PCM PIDs using the M-MDS. - RPM - APP - TP - ECT - ENG_TRQ • Are PIDs value normal?	Yes	Go to the next step.
2		No	Inspect and repair suspected PID related part.
3	• Stop the engine. • Inspect line pressure control solenoid. (See SOLENOID VALVE INSPECTION [SJ6A-EL].) • Is the normal?	Yes	Inspect the ATF condition. • If a large amount of metal specks are found, replace the transmission. (See AUTOMATIC TRANSMISSION REMOVAL/INSTALLATION [SJ6A-EL].) • If a large amount of metal specks are not found, replace the control valve body. (See CONTROL VALVE BODY REMOVAL [SJ6A-EL].) (See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)
3		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL [SJ6A-EL].) (See CONTROL VALVE BODY INSTALLATION [SJ6A-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 the vehicle is repaired, troubleshooting completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.