P0657

4GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0657: Actuator Supply Voltage Circuit / Open

DTC P0657 - Actuator Supply Voltage Circuit / Open

DESCRIPTION

The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM functioning properly. The output voltage is usually 0 V when the engine switch is turned Off. If the output voltage is higher than 7 volts when the engine switch is turned Off, the ECM will illuminate the MIL and set a DTC when the engine switch is turned On (IG).






MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Clear DTC DTC Check / Clear.
(b) Turn the engine switch Off.
(c) Disconnect the battery negative terminal and wait for 1 minute.
(d) Connect the battery terminal.
(e) Turn the engine switch On (IG) for 10 seconds.
(f) Turn the engine switch Off.
(g) Turn the engine switch On (IG).
(h) Check DTC.
OK:
P0657 is not present.
NG -- REPLACE ECM
OK -- CHECK FOR INTERMITTENT PROBLEMS