P2610

3UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2610: ECM / PCM Internal Engine Off Timer Performance

DTC P2610 - ECM / PCM Internal Engine Off Timer Performance

DTC SUMMARY





DESCRIPTION

The soak timer is built into the ECM. To ensure that the Evaporative Emission (EVAP) monitor values will be accurate, the soak timer counts 5 hours (+-15 minutes) from when the ignition switch is turned OFF. This allows the fuel to cool down, which stabilizes the Fuel Tank Pressure (FTP). When approximately 5 hours have passed, the ECM activates and begins EVAP system monitor.





MONITOR DESCRIPTION

5 hours after the ignition switch is turned OFF, the soak timer activates the ECM to begin the EVAP system monitor. While the engine is running, the ECM monitors the synchronization of the soak timer and the CPU clock. If the soak timer and CPU clock are not synchronized, the ECM interprets this as a malfunction, illuminates the MIL and sets the DTC (2 trip detection logic).

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE
HINT:
- DTC P2610 is set if an internal ECM problem is detected. Diagnostic procedures are not required. ECM replacement is required.
- Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- Continue to next step.
2. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and turn the Techstream ON.
(c) Clear DTCs DTC Check / Clear.
(d) Start the engine and wait for 10 minutes or more.
(e) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
HINT: If no pending DTC is displayed, the repair has been successfully completed.

NEXT -- END