TROUBLE DIAGNOSES — Diagnostic Procedure 4
AT-49flowchartApplies to automatic transmission (A/T) equipped vehicles. Diagnostic flowchart for N range creep symptom.
Diagnostic Procedure 4
SYMPTOM: Vehicle moves forward or backward when selecting "N" range.
Diagnostic Procedure 4 — Vehicle moves forward or backward when selecting N range
1
Does self-diagnosis show damage to inhibitor switch after cruise test?
Yes
Check inhibitor switch circuit. — Refer to "Self-diagnosis".
No
2
Check manual control linkage. — Refer to "ON-VEHICLE SERVICE".
N.G.
Adjust manual control linkage. — Refer to "ON-VEHICLE SERVICE".
O.K.
3
Check A/T fluid level again.
N.G.
Refill A.T.F.
O.K.
4
1. Remove oil pan.
2. Check A/T fluid condition.
N.G.
1. Disassemble A/T.
1. Disassemble A/T.
2. Check the following items.
• Forward clutch assembly
• Overrun clutch assembly
• Reverse clutch assembly
• Accumulator piston D
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
Self-diagnosis · ON-VEHICLE SERVICE