A faulty VSS can cause erratic shifting but not the symptoms described asit it seems to be either in limp mode or slipping.
You do not need any scanning tools to retrieve trouble codes.
Here are the procedures for retrieving transmission trouble codes.
CAUTION:Ensure battery Is fully charged prior to testing. Low battery voltage will cause faulty diagnostic system operation.
Reading Diagnostic Codes (W/O Super Monitor Display)
1. Turn ignition on with engine off. Ensure overdrive switch is in the ON position. Diagnostic codes can only be read if overdrive switch is in the ON position.
2. Determine terminal connector location. See
Fig. 1 . Using a jumper wire, connect terminals E1-To-T1 or E1-To-ECU
3. Diagnostic codes are read by counting the number of times the "OD OFF" light flashes on the instrument panel.
4. If transmission electrical system is operating normally the light will blink once every .25 Sec.
5. If there is a malfunction in the system, the light will blink once every .5 Sec. The number of blinks will equal the first number of the diagnostic code. After a 1.5 second pause, the second number of the diagnostic code will flash. If there are 2 or more codes, there is a 2.5 second pause between codes.
6. Remove jumper wire. If codes are stored, note code number and repair appropriate circuit.
If several diagnostic cores are stored, the lowest number code will flash first. Other codes will flash from lowest to highest number.
7. If diagnostic codes 62, 63, 64, 65, 73 or 74 occur an electrical failure in the solenoid is indicated. Mechanical failures such as sticking switches will not appear as diagnostic codes.
Diagnostic CodesTrouble Areas
Code 42 - Defective No. 1 speed sensor. Severed wire harness or short circuit. Fault ECU.
Code 44 - Defective rear wheel speed sensor (in transfer left
case). Severed wire harness or short circuit.
Code 61 - Defective No. 2 speed sensor. Severed wire harness or short circuit. Faulty ECU.
Code 62 - Defective No. 1 solenoid. Severed wire harness or short circuit. Faulty ECU.
Code 63 - Defective No. 2 solenoid. Severed wire harness or short circuit. Faulty ECU.
Code 64 - Defective lock-up solenoid. Severed wire harness or short circuit.
Code 65 - Defective No. 4 solenoid. Severed wire harness or short circuit.
Sunday, October 31st, 2010 AT 2:29 AM