P2610

2AZ-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

To ensure the accuracy of the EVAP (Evaporative Emission) monitor values, the soak timer, which is built into the ECM, measures 5 hours (±15 minutes) from when the ignition switch is turned off, before the monitor is run. This allows the fuel to cool down, which stabilizes the Fuel Tank Pressure (FTP). When 5 hours have elapsed, the ECM turns on.





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





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. 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.

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 to the ON position.
(c) Clear the DTCs DTC Check / Clear.
(d) Start the engine and wait for 10 minutes or more.
(e) On the Techstream, select the following menu items: Powertrain / Engine and ECT / Trouble Codes / Pending.
(f) If no pending DTC is displayed, the repair has been successfully completed.
NEXT -- END