NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M RANGE

#
NO.22 NO ENGINE BRAKING IN 1GR POSITION OF M RANGE

B3E050319090W26

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
  • Control valve body malfunction
  • Body GND malfunction

2. Signal malfunction

  • TP sensor malfunction
  • Vehicle speed sensor malfunction
  • Sensor GND malfunction
  • Input/turbine speed sensor malfunction

3. PCM 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.)

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 PCM.