TROUBLE DIAGNOSES — Diagnostic Procedure 6
AT-51flowchartApplies to automatic transmission (A/T) models. Diagnostic for "R" range no-creep symptom.
Diagnostic Procedure 6
SYMPTOM: Vehicle does not creep backward when selecting "R" range.
Diagnostic Procedure 6 — Vehicle does not creep backward when selecting "R" range
1
Check A/T fluid level again.
N.G.
Refill A.T.F.
O.K.
2
Check stall revolution with selector lever in "1" and "R" range.
N.G. in both "1" and "R" range
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, pilot valve and pilot filter)
• Line pressure solenoid
3. Disassemble A/T.
4. Check the following items.
• Oil pump assembly
• Torque converter
• Reverse clutch assembly
• High clutch assembly
• Low & reverse brake assembly
• Low one-way clutch
O.K. in "1" range, N.G. in "R" range
3
Check line pressure at idle with selector lever in "R" range. — Refer to "PRESSURE TESTING".
N.G.
same as step 2
O.K.
4
1. Remove oil pan.
2. Check 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
ON-VEHICLE SERVICE · PRESSURE TESTING