NO.8 DOES NOT SHIFT TO 6GR [AW6A-EL, AW6AX-EL]

NO.8 DOES NOT SHIFT TO 6GR [AW6A-EL, AW6AX-EL]SM2445401

id050310801300

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.

― TCC slippage, burnt

• Line pressure low

• Incorrect accelerator opening signal

• VSS malfunction

• Input/turbine speed 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

― TCC 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

― Coupler component malfunction

― 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. (See BASIC INSPECTION [AW6A-EL, AW6AX-EL].)

Diagnostic procedure

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.
1		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”. (See NO.27 GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE [AW6A-EL, AW6AX-EL].) (See NO.28 GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS [AW6A-EL, AW6AX-EL].)
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 ― 5–6 shift up and down • Are all shift-up and shift-down possible?	Yes	Go to the next step.
2		No	No shift at all: • Go to No.7 “NO SHIFTING”. (See NO.7 NO SHIFTING [AW6A-EL, AW6AX-EL].) Abnormal shift: • Go to No.9 “ABNORMAL SHIFTING”. (See NO.9 ABNORMAL SHIFTING [AW6A-EL, AW6AX-EL].)
3	• Stop the engine. • Inspect following solenoids. (See SOLENOID VALVE INSPECTION [AW6A-EL, AW6AX-EL].) ― Shift solenoid C ― Shift solenoid D ― Shift solenoid E ― Shift solenoid F ― Line pressure control solenoid • Are they normal?	Yes	Go to the next step.
3		No	Inspect the coupler component. If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
4	• Perform the stall test. (See MECHANICAL SYSTEM TEST [AW6A-EL, AW6AX-EL].) • Is the stall speed below specified value?	Yes	Inspect the ATF condition. • If large amount of metal specks are found, overhaul the transaxle and repair or replace any malfunctioning parts. (See Automatic Transaxle and Transfer Workshop Manual AW6A-EL AW6AX-EL.) • If a large amount of metal specks are not found, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
4		No	Replace the torque converter. (See TORQUE CONVERTER REMOVAL/INSTALLATION [AW6A-EL, AW6AX-EL].)
5	• Verify test results. ― If normal, return to the diagnostic index to service any additional symptoms. ― If malfunction remains, inspect the related Service 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.