P0657

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0657: Actuator Supply Voltage Circuit / Open

DTC P0657 - Actuator Supply Voltage Circuit / Open

MONITOR DESCRIPTION

The ECM monitors the output voltage to the throttle actuator. This self-check ensures that the ECM is functioning properly. The output voltage is usually 0 V when the ignition switch is turned off. If the output voltage is higher than 7 Volts when the ignition switch is turned off, the ECM will illuminate the MIL and set the DTC when the ignition switch is turned to ON.





MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





INSPECTION PROCEDURE

HINT: Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.

PROCEDURE

1. READ OUTPUT DTC (DTC P0657)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the tester ON.
(d) Clear the DTC DTC Check / Clear.
(e) Turn the ignition switch off and turn the tester off.
(f) Disconnect the tester.
(g) Disconnect the cable from the battery negative (-) terminal and wait for 1 minute.
(h) Connect the cable to the battery negative (-) terminal.
(i) Turn the ignition switch to ON for 10 seconds.
(j) Turn the ignition switch to off.
(k) Turn the ignition switch to ON.
(l) Connect the tester to the DLC3.
(m) Turn the tester ON.
(n) Select the following menu items: Powertrain / Engine / Trouble Codes.
(o) Read DTCs.
Result:





B -- REPLACE ECM
A -- CHECK FOR INTERMITTENT PROBLEMS