NO.9 ABNORMAL SHIFTING [JA5AX-EL]


9	Abnormal shifting
DESCRIPTION	• Shift incorrectly (incorrect shift pattern).
POSSIBLE CAUSE	• There is a malfunction in signal circuit which controls shifting (Throttle position signal, input/turbine speed sensor, VSS), control valve is stuck, or clutch circuit is stuck. - Clutch slipped, burned • Line pressure low • Incorrect throttle position signal • Malfunction of VSS • Malfunction of input/turbine speed sensor • Malfunction of sensor ground • Malfunction of shift solenoid A, B, or C • Malfunction of TCC solenoid valve • Malfunction of body ground • Misadjustment of accelerator cable • Malfunction of control valve body • Malfunction or misadjustment of TR switch Note • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.


STEP	INSPECTION		ACTION
1	• Inspect continuity between TCM connector terminals C and Y and transaxle case. • Is there continuity?	Yes	Go to next step.
1		No	Repair or replace ground circuit.
2	• Stop engine. • Inspect shift solenoid A, B, or C circuit. • Are they okay?	Yes	Inspect TCM connector terminal for bend, damage, corrosion or poor contact.
2		No	• Inspect connection of shift solenoid A, B, or C terminal on ATX for bend, damage, corrosion or looseness. • Inspect for shift solenoid mechanical stuck. (See SOLENOID VALVE INSPECTION [JA5AX-EL].) - If shift solenoids okay, inspect for open or short circuit between TCM connector terminals 2W, 2T, 2X and coupler component terminals I, G, or F.
3	• Verify test results. - If okay, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Informations and perform repair or diagnosis. • If vehicle repaired, troubleshooting completed. • If vehicle not repaired or additional diagnostic information not available, replace TCM.

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