Trouble Symptom Chart
TROUBLE SYMPTOM CHART
| Trouble symptom | Probable causes | |
|---|---|---|
| Data communication trouble with Hi-Scan Trouble in communication with Hi-Scan may be caused by diagnosis line failure or failed ECM. |
Diagnosis line failure Connector failure ECM failure |
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| Driving trouble | No start up No start-up with the shift lever at position "P" or "N". It may be caused by the engine system failure, the torque converter failure, or the oil pump failure. |
Engine system failure Connector failure ECM failure |
| No forward motion Vehicle does not move forward when the shift lever moves from "N" to "D" with the engine running. It may be caused by the abnormal line pressure, the underdrive clutch failure, or the valve body failure. |
Abnormal line pressure UD solenoid valve failure UD clutch failure Valve body failure |
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| No reverse motion Vehicle does not move backward when the shift lever moves from "N" to "R" with engine running. It may be caused by abnormal pressure in the reverse clutch or the LR brake, or the reverse clutch failure, the LR brake failure, or the valve body failure. |
Abnormal reverse clutch pressure Abnormal LR brake pressure LR brake solenoid valve failure Reverse clutch failure LR brake failure Valve body failure |
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| No forward and backward motion Vehicle moves neither forward nor backward in any position of the shift lever with the engine running. It may caused by the abnormal line pressure, failed powertrain, failed oil pump, or failed valve body. |
Abnormal line pressure Powertrain failure Oil pump failure Valve body failure |
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| Malfunction in start-up | Engine stops in shifting If the engine stops when shifting N -->D or N -->R with the engine idling, it may be caused by failure in the engine system, the damper clutch, the solenoid valve, the valve body or the torque converter (the damper clutch). |
Engine system failure DCC solenoid valve failure Valve failure Valve body failure Torque converter failure (Damper clutch failure) |
| Shifting shock | Shock and retardation in shifting N -->D If there is abnormal shock and retardation longer then 2 seconds in shifting N -->D with the engine idling, it may be caused by abnormal the UD clutch pressure or the UD clutch failure, the valve body failure or the throttle position sensor failure. Abnormal UD clutch pressure |
Abnormal LR brake pressure UD solenoid valve failure Valve body failure Idling position switch failure |
| Shifting shock | Shock and retardation in shifting N -->R If there is abnormal shock and retardation longer than 2 seconds in shifting N -->R with the engine idling, it may be caused by an abnormal reverse clutch pressure or abnormal LR brake pressure, or the reverse clutch failure, the LR brake failure, the valve body failure, or the throttle position sensor failure. |
Abnormal reverse clutch pressure Abnormal low pressure and reverse brake pressure Low pressure and reverse solenoid valve failure Reverse clutch failure Low pressure and reverse brake failure Valve body failure Throttle position switch failure |
| Shock and retardation in shifting N -->D and N -->R If there is abnormal shock and retardation longer than 2 seconds in shifting N -->D and N -->R with the engine idling, it may be caused by abnormal line pressure, the fluid pump failure or the valve body failure. |
Abnormal line pressure Oil pump failure Valve body failure |
|
| Malfunction in shifting | Shock, turbine rpm increase If up-shifting or down-shifting shock occurs or the transaxle speed is higher than the engine speed during driving, it may be caused by abnormal line pressure, the solenoid valve failure, the oil pump failure, the valve body failure or the clutch brake failure. |
Abnormal line pressure Each solenoid valve failure Oil pump failure Valve body failure Each clutch brake failure |
| Incorrect shifting range | Shifting range error at every shifting point (shift timing error) If timing error occurs in every shifting point during driving, it may be caused by the speed sensor failure, the TPS failure, or the solenoid valve failure. |
Output shaft speed sensor failure Throttle position sensor failure Each solenoid valve failure Abnormal line pressure Valve body failure ECM failure |
| One or some shifting points (shift timing error) If timing error occurs in one or some shifting points during driving, it may be caused by faulty valve body or faulty control. It is not a failure. |
Valve body failure | |
| No shifting | No trouble code output No shifting and no trouble code output during driving, may be caused by the transaxle range switch failure or ECM failure. |
Transaxle range switch failure ECM failure |
| Trouble during driving | Poor acceleration If there occurs downshifting but no acceleration during driving, it may be caused by the engine system failure, the clutch failure, or the brake failure. |
Engine system failure Clutch or brake failure |
| Vibration If there occurs vibration during driving at a constant speed or during acceleration/deceleration the highest range, it may be caused by abnormal damper clutch pressure, or the engine system failure, the damper clutch control solenoid valve failure, the torque converter failure, or the valve body failure. |
Abnormal clutch pressure Engine system failure Damper clutch control solenoid valve failure Torque converter failure Valve body failure |
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| Others | Transaxle inhibitor switch line Caused by the transaxle range switch circuit failure, the ignition switch circuit failure, or the ECM failure. |
Transaxle range switch failure Ignitor switch failure Connector failure ECM failure |
| Throttle position sensor line Caused by the throttle position sensor circuit faultiness, or the ECM failure. |
Throttle position sensor Connector failure ECM failure |
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| Triple switch line Caused by the triple switch circuit faultiness or the ECM failure. |
Triple switch failure Connector failure A/C system failure ECM failure |
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| Vehicle speed sensor line Caused by the vehicle speed sensor circuit faultiness or the ECM failure |
Vehicle speed sensor failure Connector failure ECM failure |
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