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NO.8 DOES NOT SHIFT TO 5GR [JA5A-EL]

BME050301030244

8 | Does not shift to 5GR
DESCRIPTION | • Vehicle does not upshift from 4GR to 5GR even though vehicle speed is increased. • Vehicle does not shift to 5GR even though accelerator pedal is released in D range at 60 km/h {37 mph}.
POSSIBLE CAUSE | • Basically, TCC does not operate when the fail-safe is operating. Verify the DTCs first. If the TCC operates when driving at high speeds only, the malfunction (improper adjustment) is in the HOLD switch circuit or TR switch circuit.

  Caution

  • If the TCC is stuck, inspect it. In addition, inspect the oil cooler for foreign particles which may have mixed in with the ATF.

  1. TCC piston slippage, burnt

  • Line pressure low
  • Incorrect throttle position signal
  • ECT sensor malfunction
  • VSS malfunction
  • Input/turbine speed sensor malfunction
  • Sensor GND malfunction

  2. TFT sensor malfunction

  • Short or open circuit in wiring harness
  • Poor connection of connector
  • Sensor malfunction

  3. TR switch malfunction

  • Selector lever adjustment incorrect
  • TR switch adjustment incorrect

  4. Malfunction of TCC solenoid valve

  • Short or open circuit in wiring harness
  • Poor connection of connector
  • Solenoid valve stuck

  5. HOLD switch malfunction
  6. Torque converter malfunction
  7. 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.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | With ignition switch at the ON position, does the HOLD indicator light indication correspond to the HOLD switch operation? | Yes | Go to the next step.
No | Go to No.26 "HOLD INDICATOR LIGHT DOES NOT ILLUMINATE WHEN HOLD SWITCH IS TURNED TO ON", or No.27 "HOLD INDICATOR LIGHT ILLUMINATE WHEN HOLD SWITCH IS NOT TURNED TO ON".
2 | Drive the vehicle in D range and inspect following: 1-2 shift up and down 2-3 shift up and down 3-4 shift up and down 4-5 shift up and down
Are all shift-up and shift-down possible?
Yes
Go to the next step.
No | No shift at all: • Go to No.7 "NO SHIFTING". Abnormal shift: • Go to No.9 "ABNORMAL SHIFTING".
3 | Stop the engine. Inspect the shift solenoid A, B, or C circuit. Are they normal? | Yes | Go to the next step.
No | Inspect for stuck shift solenoid. (See SOLENOID VALVE INSPECTION [JA5A-EL].)
4 | Remove the torque converter. Inspect the torque converter. (See ATX Workshop Manual.) Is the torque converter normal? | Yes | Overhaul the control valve body and repair or replace any malfunctioning parts. (See ATX Workshop Manual.) If any problem remains, replace or overhaul the transaxle and repair or replace any malfunctioning parts. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION [JA5A-EL].)
(See ATX Workshop Manual.)
No | Replace the torque converter.
5 | • 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.