P2610

3MZ-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 (included in the HV control ECU), measures 5 hours (+/- 15 minutes) from the time the ignition switch is turned off, before the monitor begins to 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 (included in the HV control ECU) 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 these two are not synchronized, the ECM interprets this as a malfunction. The ECM illuminates the MIL and sets the DTC (2 trip detection logic).

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

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TYPICAL MALFUNCTION THRESHOLDS

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INSPECTION PROCEDURE
HINT:
- DTC P2610 is set if an internal ECM (included in the HV control ECU) problem is detected. Diagnostic procedures are not required. ECM replacement is required.
- 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 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 HV CONTROL ECU
NEXT -- Continue to next step.
2. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect 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 tester, enter the following menu items: Powertrain / Engine and ECT / Trouble Code / Pending.
(f) If no pending DTC is displayed, the repair has been successfully completed.
NEXT -- END