Initial Inspection and Diagnostic Overview
A/T FLUID CHECKFluid leakage check
1. Clean area suspected of leaking, - for example, mating surface of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in "D" position and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
Fluid Condition Check:
Fluid level check - Refer to section MA.
ROAD TESTING
Description
- The purpose of this road test is to determine overall performance of automatic transmission and analyze causes of problems.
- The road test consists of the following three parts:
1. Check before engine is started
2. Check at idle
3. Cruise test
- Before road test, familiarize yourself with all test procedures and items to check.
- Conduct tests on all items. Troubleshoot items which check out No Good after road test. Refer to "Self-diagnosis" and "Diagnostic Procedure".
1. Check before engine is started
Part 1:
Part 2:
2. Check at idle
3. Cruise test
- Check all items listed in Parts 1 through 3.
With CONSULT
- Using CONSULT, conduct a cruise test and record the result.
- Print the result and ensure that shifts and lock-ups take place as per "Shift Schedule."
CONSULT setting procedure
1. Turn off ignition switch.
2. Connect "CONSULT" to data link connector for CONSULT. (Data link connector for CONSULT is located in left dash side panel.)
3. Turn on ignition switch.
4. Touch "START".
5. Touch "A/T".
6. Touch "DATA MONITOR".
7. Touch "SETTING" to set recording condition.
8. Touch "LONG TIME" and "ENTER" key.
9. Go back to SELECT MONITOR ITEM and touch "MAIN SIGNALS".
10. Touch "START".
11. When performing cruise test, touch "RECORD".
12. After finishing cruise test part 1, touch "STOP".
13. Touch "DISPLAY".
14. Touch "PRINT".
15. Touch "PRINT" again.
16. Check the monitor data printed out.
17. Continue cruise test part 2 and 3.
Without CONSULT
- Throttle position can be controlled by voltage across terminals (34) and (35) of A/T control unit.
Cruise Test - Part 1(a):
Cruise Test - Part 1(b):
Cruise test - Part 1
Cruise Test - Part 2:
Cruise test - Part 2
Cruise Test - Part 3:
Cruise test - Part 3
Vehicle Speed When Shifting Gears:
Vehicle speed when shifting gears
Vehicle Speed When Performing And Releasing Lock-up:
Vehicle speed when performing and releasing lock-up
Shift Schedule - Overdrive ON:
Shift schedule (Overdrive ON)
Shift Schedule - Overdrive OFF:
Shift schedule (Overdrive OFF)
Diagnosis by CONSULT
NOTE:
1. The CONSULT electrically displays shift timing and lock-up timing (that is, operation timing of each solenoid). When a noticeable time difference occurs between shift timing which is manifested by shift shock and the CONSULT display, mechanical parts (except solenoids, sensors, etc.) are considered to be malfunctioning. Check mechanical parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) displayed on CONSULT and that indicated in Service
Manual may differ slightly. This occurs because of the following reasons:
- Actual shift schedule has more or less tolerance or allowance,
- Shift schedule indicated in Service Manual refers to the point where shifts starts, and
- Gear position displayed on CONSULT indicates the point where shifts are completed.
3. Shift solenoid valve "A" or "B" is displayed on CONSULT at the start of shifting while gear position is displayed upon completion of shifting (which is computed by A/T control unit).