PCM sets DTC P0638 if the PCM detects TPS adaptation value exceeds threshold value.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | Case 1 |
•
TPS adaptation condition check | 1. Poor Connector Connection 2. Defected TPS1 or TPS2 Sensor 3. Defected ETC Motor |
Case 2 |
•
ETC Limp Home position check | ||
Case 3 |
•
Lower mechanical stop adaptation voltage range check | ||
Enable Condition |
•
During TPS Adapataion | ||
Threshold Value | Case 1 |
•
TPS adaptation requested, but not possible | |
Case 2 |
•
Difference between throttle sensor voltage in limphome and limphome setpoint higher than 0.332V | ||
Case 3 |
•
Difference between throttle sensor voltage in lower mechanical stop position and lower mechanical stop position setpoint higher than 0.332V | ||
Diagnostic Time |
•
1.2 sec. | ||
MIL ON Condition |
•
1 Driving Cycle | ||
