A/T Symptom Diagnosis; Electrical Repair - Suzuki Liana RH418 Supplementary Service Manual

5A-28 Automatic Transmission/Transaxle:

A/T Symptom Diagnosis

Trouble Diagnosis 1

Electrical repair

Condition
→
Poor 1 2 shift
→
Poor 2 3 shift
→
Poor 3 O/D shift
Possible cause
Shift solenoid valve-B circuit faulty
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.
Throttle position sensor signal circuit
faulty
Throttle position sensor circuit faulty
TCM
ECM
Shift solenoid valve-A circuit faulty
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.
Throttle position sensor signal circuit
faulty
Throttle position sensor circuit faulty
TCM
ECM
Shift solenoid valve-B circuit faulty
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.
Transmission fluid temperature sensor
circuit faulty
Throttle position sensor signal circuit
faulty
Engine coolant temperature sensor
signal circuit faulty
Throttle position sensor circuit faulty
Engine coolant temperature sensor
circuit faulty
O/D off switch circuit faulty
TCM
ECM
Correction / Reference Item
Inspect circuit for open, short and intermittent.
If NG, repair.
If NG, repair.
If NG, repair.
Inspect circuit for open, short and intermittent.
If NG, repair.
Inspect circuit for open, short and intermittent
referring to "DTC P0120 (No. 13): Throttle
Position Circuit Malfunction in Section 1A". If
NG, repair.
Substitute a known-good TCM and recheck.
Substitute a known-good ECM and recheck.
Inspect circuit for open, short and intermittent.
If NG, repair.
If NG, repair.
If NG, repair.
Inspect circuit for open, short and intermittent.
If NG, repair.
Inspect circuit for open, short and intermittent
referring to "DTC P0120 (No. 13): Throttle
Position Circuit Malfunction in Section 1A". If
NG, repair.
Substitute a known-good TCM and recheck.
Substitute a known-good ECM and recheck.
Inspect circuit for open, short and intermittent.
If NG, repair.
If NG, repair.
If NG, repair.
Inspect circuit for open, short and intermittent.
If NG, repair.
Inspect circuit for open, short and intermittent.
If NG, repair.
Inspect circuit for open, short and intermittent.
If NG, repair.
Inspect circuit for open, short and intermittent
referring to "DTC P0120 (No. 13): Throttle
Position Circuit Malfunction in Section 1A". If
NG, repair.
Inspect circuit for open, short and intermittent
referring to "DTC P0115 (No. 19): Engine
Coolant Temp. (ECT) Circuit Malfunction in
Section 1A". If NG, repair.
Refer to "No Gear Shift to O/D".
Substitute a known-good TCM and recheck.
Substitute a known-good ECM and recheck.
S3RH0B5104018