7B1-28 AUTOMATIC TRANSAXLE (M13 ENGINE)
Trouble Diagnosis Table
Trouble diagnosis table-1
Electrical Repair
Condition Possible Cause Correction
Excessive shift
shock
Shift solenoid valve-A and/or-B circuit faulty
Inspect circuit for open, short and intermit-
tent. If NG, repair.
Pressure control solenoid valve circuit faulty
(Only when N
→
D or 3
↔
O/D shifting)
Timing solenoid valve circuit faulty
Output shaft speed sensor (VSS) circuit faulty
Input shaft speed sensor circuit faulty
Transmission fluid temperature sensor circuit
faulty
CAN communication circuit faulty
Throttle position sensor circuit faulty
Inspect circuit for open, short and intermit-
tent referring to Section 6. If NG, repair.
Crank position sensor circuit faulty
TCM Substitute a known-good TCM and recheck.
ECM Substitute a known-good ECM and recheck.
No gear shift as
3rd gear
Shift solenoid valve-A and/or-B circuit faulty
Inspect circuit for open, short and intermit-
tent. If NG, repair.
Pressure control solenoid valve circuit faulty
Timing solenoid valve circuit faulty
TCM Substitute a known-good TCM and recheck.
Poor 1
→
2 shift
Shift solenoid valve-B circuit faulty
Inspect circuit for open, short and intermit-
tent. If NG, repair.
Output shaft speed sensor (VSS) circuit faulty
Transmission range sensor circuit faulty
CAN communication circuit faulty
Throttle position sensor circuit faulty
Inspect circuit for open, short and intermit-
tent referring to Section 6. 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 intermit-
tent. If NG, repair.
Output shaft speed sensor (VSS) circuit faulty
Transmission range sensor circuit faulty
CAN communication circuit faulty
Throttle position sensor circuit faulty
Inspect circuit for open, short and intermit-
tent referring to Section 6. If NG, repair.
TCM Substitute a known-good TCM and recheck.
ECM Substitute a known-good ECM and recheck.
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