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NO.22 NO ENGINE BRAKING IN L RANGE [JA5A-EL]

BME050301030258

22 | No engine braking in L range
DESCRIPTION | • Engine speed drops to idle but vehicle coasts when accelerator pedal is released during cruising at medium to high speeds. • Engine speed drops to idle but vehicle coasts when accelerator pedal is released when in L range at low vehicle speed.
POSSIBLE CAUSE | 1. Clutch slippage, burnt (Reduction brake)

  • Line pressure low
  • VSS malfunction
  • Input/turbine speed sensor malfunction
  • Sensor GND malfunction
  • Control valve body malfunction

2. TCM does not determine that the HOLD switch is ON (short, or open circuit, poor operation)

  • HOLD 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 | Inspect the TR switch adjustment. Does the TR switch adjusted properly? Select the PNP PID. Is the PNP PID reading normal when selecting range? | Yes | Go to the next step.
No | Adjust the TR switch if necessary. (See TRANSAXLE RANGE (TR) SWITCH ADJUSTMENT [JA5A-EL].) Inspect the TR switch. Repair or replace any malfunctioning parts.
2 | 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.
3 | • Verify the test results.

  - If normal, return to the diagnostic index to service any additional symptoms.
  - If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair 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.