Suzuki Liana RH418, Supplementary Service Manual

Page: 254 / 371

5A-28 Automatic Transmission/Transaxle:
A/T Symptom Diagnosis
S3RH0B5104018
Trouble Diagnosis 1
Electrical repair
Condition Possible cause Correction / Reference Item
Poor 1
→
2 shift Shift solenoid valve-B circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Throttle position sensor signal circuit
faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Throttle position sensor circuit faulty Inspect circuit for open, short and intermittent
referring to “DTC P0120 (No. 13): Throttle
Position Circuit Malfunction in Section 1A”. If
NG, repair.
TCM Substitute a known-good TCM and recheck.
ECM Substitute a known-good ECM and recheck.
Poor 2
→
3 shift Shift solenoid valve-A circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Throttle position sensor signal circuit
faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Throttle position sensor circuit faulty Inspect circuit for open, short and intermittent
referring to “DTC P0120 (No. 13): Throttle
Position Circuit Malfunction in Section 1A”. If
NG, repair.
TCM Substitute a known-good TCM and recheck.
ECM Substitute a known-good ECM and recheck.
Poor 3
→
O/D shift Shift solenoid valve-B circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Output shaft speed sensor circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Transmission range sensor circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Transmission fluid temperature sensor
circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Throttle position sensor signal circuit
faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Engine coolant temperature sensor
signal circuit faulty Inspect circuit for open, short and intermittent.
If NG, repair.
Throttle position sensor circuit faulty Inspect circuit for open, short and intermittent
referring to “DTC P0120 (No. 13): Throttle
Position Circuit Malfunction in Section 1A”. If
NG, repair.
Engine coolant temperature sensor
circuit faulty 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.
O/D off switch circuit faulty Refer to “No Gear Shift to O/D”.
TCM Substitute a known-good TCM and recheck.
ECM Substitute a known-good ECM and recheck.