8

Does not shift to 6GR

DESCRIPTION

• Vehicle does not upshift from 5GR to 6GR even though vehicle speed is increased.

• Vehicle does not shift to 6GR even though accelerator pedal is released in D range at 80 km/h {50 mph}.

POSSIBLE CAUSE

• Basically, TCC does not operate when the fail-safe is operating. Verify the DTC at first. If the TCC operates when driving at high speeds only, the malfunction (improper adjustment) is in the M range 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.

• C2 clutch, C3 clutch, B2 brake slippage, burnt

• Line pressure low

• Incorrect throttle position signal

• Incorrect accelerator pedal position signal

• Incorrect engine speed signal

• Incorrect engine coolant temperature signal

• Incorrect engine torque signal

• VSS malfunction

• Turbine sensor malfunction

• Sensor GND malfunction

• TFT sensor malfunction

• Short or open circuit in wiring harness

• Poor connection of connector

• Sensor malfunction

• TR switch malfunction

• Selector lever adjustment incorrect

• TR switch adjustment incorrect

• Shift solenoid A, shift solenoid B, shift solenoid C, shift solenoid D, shift solenoid G, line pressure control solenoid malfunction

• Short or open circuit in wiring harness

• Poor connection of connector

• Solenoid valve stuck

• M range switch malfunction

• Selector lever adjustment incorrect

• Short or open circuit in wiring harness

• Torque converter 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

• With the ignition switch at the ON position.

• Does the gear position indicator light indication correspond to selector lever position?

Yes

Go to the next step.

No

Go to No.27 “GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE”, or No.28 “GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS”.

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.

No

Inspect and repair suspected PID related part.

3

• Inspect the TFT sensor.

  (See TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR INSPECTION [SJ6A-EL].)

• Is the TFT sensor normal?

Yes

Go to the next step.

No

Replace the TFT sensor.

4

• 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

• 5–6 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”.

5

• Stop the engine.

• Inspect following solenoid.

  (See SOLENOID VALVE INSPECTION [SJ6A-EL].)

• Shift solenoid A

• Shift solenoid B

• Shift solenoid C

• Shift solenoid D

• Shift solenoid F

• Line pressure control solenoid

• Are they normal?

Yes

Go to the next step.

No

Inspect for shift solenoid stuck.

(See SOLENOID VALVE INSPECTION [SJ6A-EL].)

6

• Remove the torque converter.

  (See TORQUE CONVERTER REMOVAL/INSTALLATION [SJ6A-EL].)

• Inspect the torque converter.

• Is the torque converter 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].)

No

Replace the torque converter.

7

• Verify test results.

• If normal, return to the diagnostic index to service any additional symptoms.

• If malfunction remains, inspect the related Service Bulletins and/or On-line Repair 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.