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
Short to Ground
Short to ground in Power circuit
Poor connection or damaged harness
Faulty ETC
Enable
Conditions
IG ON
Threshold
Value
TPS power supply voltage < 0.7 V
Case 2
Sensor or circuit error
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