#
NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M RANGE [FS5A-EL]

id050308802700

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 when in 1GR of M range at low vehicle speed.
POSSIBLE CAUSE | 1. Clutch slippage, burnt (low and reverse brake) • Line pressure low • Shift solenoid D malfunction • Shift solenoid E malfunction • Shift solenoid C malfunction • Pressure control solenoid B malfunction • Control valve body malfunction • Body GND malfunction 2. Signal malfunction • TP sensor malfunction • APP sensor malfunction • Vehicle speed sensor malfunction • Sensor GND malfunction • Input/turbine speed sensor malfunction 3. TCM does not determine that the M range switch is ON (short, or open circuit, poor operation) • M range switch signal malfunction Note • Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

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 symptom troubleshooting NO.14 "ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING" or No.15 "ENGINE FLARES UP OR SLIPS WHEN ACCELERATING VEHICLE".
No | Repeat basic inspection and repair or replace any malfunctioning parts according to the inspection result. (See BASIC INSPECTION [FS5A-EL].)
2 | • Verify the 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 is completed. • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.