The PCM provides a 5 volt reference voltage to the Throttle Position Sensor(TPS). The PCM monitors reference voltage deviation from the power supply circuit of the TPS.
PCM sets P0652 when detects a reference voltage is out of normal range.
Item | Detecting Condition | Possible Cause | |
Case 1 | DTC Strategy |
•
Electrical check | 1. Short to ground in Power circuit 2. Poor connection or damaged harness 3. Faulty ETC |
Enable Conditions |
•
IG ON | ||
Threshold Value |
•
Short to ground
•
TPS power supply voltage < 0.7 V | ||
Case 2 | DTC Strategy |
•
Electrical check | |
Enable Conditions |
•
IG ON | ||
Threshold Value |
•
Sensor or wiring harness problem
•
0.7 V ≤ TPS power supply voltage < 4.5 V | ||
Diagnostic Time |
•
0.04 sec. | ||
Mil On Condition |
•
1 driving cycle | ||
Limp-Home |
•
Forced limited RPM mode : The PCM limits engine speed to 1500rpm
•
Electrical check of the ETC system is prohibited | ||
