TROUBLE DIAGNOSES — Diagnostic Procedure 7
AT-52flowchartApplies to automatic transmission (A/T) only. Selector ranges D, 2, and 1.
Diagnostic Procedure 7
SYMPTOM: Vehicle does not creep forward when selecting "D", "2" or "1" range.
Diagnostic Procedure 7 — Vehicle does not creep forward when selecting D, 2 or 1 range
1
Check A/T fluid level again.
N.G.
Refill A.T.F.
O.K.
2
Check stall revolution with selector lever in "D" range. — Refer to "STALL TESTING".
N.G.
1. Remove control valve assembly. — Refer to "ON-VEHICLE SERVICE".
1. Remove control valve assembly. — Refer to "ON-VEHICLE SERVICE".
2. Check the following items.
• Valves to control line pressure (Pressure regulator valve, modifier valve, pilot valve and pilot filter)
• Line pressure solenoid
3. Disassemble A/T
4. Check the following items.
• Oil pump assembly
• Forward clutch assembly
• Forward one-way clutch
• Low one-way clutch
• Low & reverse brake assembly
• Torque converter
O.K.
3
Check line pressure at idle with selector lever in "D" range. — Refer to "PRESSURE TESTING".
N.G.
same as step 2
O.K.
4
1. Remove oil pan.
2. Check A/T fluid condition.
N.G.
same as step 2
O.K.
5
Check again.
N.G.
1. Perform A/T control unit input/output signal inspection.
1. Perform A/T control unit input/output signal inspection.
2. If N.G., recheck A/T control unit pin terminals for damage or connection of A/T control unit harness connector.
O.K.
INSPECTION END
See also
STALL TESTING · PRESSURE TESTING · ON-VEHICLE SERVICE