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NO.10 DOES NOT SHIFT TO 4GR

BHE050301026W15

10 | Does not shift to 4GR
DESCRIPTION | • Vehicle does not upshift from 3GR to 4GR even though vehicle speed is increased. • Vehicle does not shift to 4GR even though accelerator pedal is released in D range at 60 km/h {37 mph}.
POSSIBLE CAUSE | • Oil temperature of TFT sensor is low (4GR is inhibited when temperature is 5 °C {41 °F} or below.) • Improper adjustment of TR switch • Control valve body malfunction (improper operation, stuck, clogged oil passage) – Hydraulic circuit clogging (shift solenoid A) – Control valve spool malfunction • TFT sensor malfunction – Short or open circuit in wiring – Poor connection of connector – Sensor 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.)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | With the ignition switch at the ON position, does the gear position indicator light indication correspond to the selector lever position? | Yes | Go to the next step.
No | Go to No.29 "GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE", or No.30 "GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS".
2 | Inspect the voltages at the following TCM terminals. (See TCM INSPECTION.) • Terminals 2J and 2N (TFT sensor) Are voltages normal? | Yes | Go to the next step.
No | Repair or replace any malfunctioning parts.
3 | Disconnect the solenoid valve connector. Measure the resistance between terminals E and J at solenoid valve connector. (See SOLENOID VALVE INSPECTION.) Is the resistance normal? | Yes | Go to the next step.
No | Repair or replace any malfunctioning parts.
4 | Disconnect the TCM connector. Is the resistance between ground terminal 2M or 2Q at the TCM connector and body ground 5.0 ohms or less? | Yes | Go to the next step.
No | Repair open ground circuit. Reconnect the TCM.
5 | Inspect the following valves. (See PCM INSPECTION.) (See TCM INSPECTION.) PCM PID (using WDS or equivalent): • VSS TCM terminal voltage: • 2K (VSS) Are they normal? | Yes | Overhaul the control valve body and repair or replace any malfunctioning parts. (See AT Workshop Manual.) If the problem remains, overhaul the transmission and repair or replace any malfunctioning parts. (See AT Workshop Manual.)
No | Repair or replace malfunctioning parts.
6 | 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 completed. – If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION.)