Mechanics

SHIFTING

1996 Toyota Corolla

Transmission problem
1996 Toyota Corolla 4 cyl Front Wheel Drive Automatic 140000 miles

when start up and put in gear sometimes it will take off and shift all threw the gears, and most of the time it stays stuck in one gear not shifting. And the reverse dont work either. I put another transmission in. Computer board too. I have put alot of money in to this. I took it to another transmission shop they told me it was the sileniod. I dont know what to do or who to believe. The car is for my daughter, and I dont know much about them. Could you give me a suggestion what I should do. Thanks dawn
Avatar
Halfbarrell
September 9, 2008.




Hi Dawn,

Do the fiollowing test and find out what is causing the problem.

Transaxle Will Not Shift
1. Warm engine to normal operating temperature. Connect voltmeter between terminals TT and E1 of DLC1.


http://www.2carpros.com/forum/automotive_pictures/192750_DLC96Corolla_1.jpg



Turn ignition on. Note that voltage changes as throttle pedal is depressed.
2. If voltage changes with throttle opening, go to step 6). If voltage does not change with throttle opening, go to next step. Access ECT ECU.
See Fig.


http://www.2carpros.com/forum/automotive_pictures/192750_Comp96Corolla01_1.jpg




http://www.2carpros.com/forum/automotive_pictures/192750_Comp96Corolla02_1.jpg



3. Connect voltmeter between terminals B/K and E1 on ECT ECU connector.
See Fig.


http://www.2carpros.com/forum/automotive_pictures/192750_ECUPCM96Corolla_1.jpg



No voltage should exist with brake pedal released. About 10-14 volts should exist with brake pedal depressed.
4. If voltage is not as specified, check for defective brakelight switch. If brakelight switch is okay, inspect and repair circuit between brakelight switch and ECT ECU. See appropriate wiring diagram in WIRING DIAGRAMS .
5. If voltage is as specified, check for defective ECT ECU power source or ground connections. Check for short or open circuit in wire to TT terminal of DLC1. Check for defective throttle position sensor or wiring. See THROTTLE POSITION (TP) SENSOR under COMPONENT TESTS.
6. Perform MANUAL SHIFT TEST . If transaxle does not perform correctly, disassemble and inspect transaxle. If transaxle operates correctly, road test vehicle and ensure voltage at terminal TT increases from zero to 7 volts. See GEAR SELECTOR SIGNAL under CIRCUIT TESTS.
7. If no voltage exists, proceed to step 9). If voltage increases from zero to 7 volts, transaxle or solenoids are faulty. If voltage increases from zero to 4 volts, perform NO UPSHIFT TO OVERDRIVE. See SYMPTOM DIAGNOSIS under PERFORMANCE TESTS..
8. If voltage increases from zero to 2 volts, check for 10-14 volts between terminals 2 and E1 on ECT ECU with connector connected and shift lever in "D" position. See Fig. above . If 10-14 volts exist, check for defective park/neutral position switch. If switch is okay, inspect and repair circuit (s) between switch and ECT ECU. See appropriate wiring diagram in WIRING DIAGRAMS . If 10-14 volts does not exist, replace ECT ECU.
9. Check for 10-14 volts between terminals "L" and E1 on ECT ECU with connector connected and shift lever in "D" position. See Fig. above . If 10-14 volts exist, check for defective park/neutral position switch. If switch is okay, inspect and repair circuit(s) between switch and ECT ECU. See appropriate wiring diagram in WIRING DIAGRAMS . If 10-14 volts does not exist, replace ECT ECU.

Page 1 of 1 DIAGNOSIS - A-240 "E" SERIES -1996 Toyota Corolla 9/14/2008

KHLow2008
Sep 14, 2008.


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