Electrical repair

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TROUBLE DIAGNOSIS 1 TABLE

Condition	Possible Cause	Action
No up-shift (fixed gear position)	Battery voltage abnormality	Inspect charging system, referring to GENERATOR TEST (UNDERCHARGED BATTERY CHECK) or GENERATOR TEST (OVERCHARGED BATTERY CHECK) .
	Input shaft speed sensor 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 .
	Pressure control solenoid valve circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	Shift solenoid valve-A (No. 1) circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	Shift solenoid valve-B (No. 2) circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	CAN communication circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	TCM	Substitute a known-good TCM and recheck .
	ECM	Substitute a known-good ECM and recheck .
Poor 1 → 2 shift	Transmission range sensor circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	TCM	Substitute a known-good TCM and recheck .
	ECM	Substitute a known-good ECM and recheck .
Poor 2 → 3 shift	Transmission range sensor circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	TCM	Substitute a known-good TCM and recheck .
	ECM	Substitute a known-good ECM and recheck .
Poor 3 → 4 shift	Transmission range sensor circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	CAN communication circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	Engine coolant temperature sensor circuit faulty	Inspect circuit for open, short and intermittent by referring to ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION . If NG, repair .
	"3" position switch circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	TCM	Substitute a known-good TCM and recheck .
	ECM	Substitute a known-good ECM and recheck .
Incorrect gear shift point	Throttle position sensor circuit faulty	Inspect circuit for open, short and intermittent by referring to ELECTRIC THROTTLE BODY ASSEMBLY ON-VEHICLE INSPECTION . If NG, repair .
	Throttle position sensor faulty	Inspect by referring to ELECTRIC THROTTLE BODY ASSEMBLY ON-VEHICLE INSPECTION . If NG, repair .
	TCM	Substitute a known-good TCM and recheck .
	ECM	Substitute a known-good ECM and recheck .
Non operate TCC (lock-up) system	TCC solenoid valve 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 circuit faulty	Inspect circuit for open, short and intermittent, referring to ELECTRIC THROTTLE BODY ASSEMBLY ON-VEHICLE INSPECTION . If NG, repair .
	Engine coolant temperature sensor circuit faulty	Inspect circuit for open, short and intermittent, referring to ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION . If NG, repair .
	Brake light switch circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	CAN communication circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
	TCM	Substitute a known-good TCM and recheck .
	ECM	Substitute a known-good ECM and recheck .
Higher or lower stall speed	Pressure control solenoid valve circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
Higher or lower stall speed	TCM	Substitute a known-good TCM and recheck .
Excessive "N"→"D" or "N"→"R" time lag	Pressure control solenoid valve circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
Excessive "N"→"D" or "N"→"R" time lag	TCM	Substitute a known-good TCM and recheck .
Higher or lower line pressure	Pressure control solenoid valve circuit faulty	Inspect circuit for open, short and intermittent. If NG, repair .
Higher or lower line pressure	TCM	Substitute a known-good TCM and recheck .