- DTC judgment completed
- System normal
Lexus NX: ECM / PCM Internal Engine Off Timer Performance (P2610)
Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / ECM / PCM Internal Engine Off Timer Performance (P2610)
DTC SUMMARY
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P2610 | ECM / PCM Internal Engine Off Timer Performance | ECM internal malfunction (2 trip detection logic). | ECM | Comes on | DTC stored |
| DTC No. | Monitoring Item | Detection Timing | Detection Logic |
|---|---|---|---|
| P2610 | Soak timer (built into ECM) | Power switch off | 2 trip |
DESCRIPTION
The soak timer operates after the power switch is turned off. When a certain amount of time has elapsed after turning the power switch off, the soak timer activates the ECM to perform malfunction checks which can only be performed after the engine is stopped. The soak timer is built into the ECM.
MONITOR DESCRIPTION
- While the power switch is off, 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, illuminates the MIL and stores the DTC.
- If the soak timer activates the ECM even though only a short amount of time has elapsed since the power switch was turned off, or if the soak timer does not activate the ECM even though a considerable amount of time has elapsed since the power switch was turned off, the ECM determines that the soak timer is malfunctioning, illuminates the MIL and stores a DTC the next time the power switch is turned on (IG).
MONITOR STRATEGY
| Related DTC | P2610: ECM internal engine off timer performance |
| Required Sensors/Components (Main) | ECM |
| Required Sensors/Components (Related) | - |
| Frequency of Operation | Once per driving cycle |
| Duration | 2 times: Case 1 -: Case 2 and 3 |
| MIL Operation | 2 driving cycles |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
All| Monitor runs whenever the following DTCs are not stored | None |
| All of the following conditions are met | - |
| Auxiliary battery voltage | 8 V or higher |
| Power switch | Off |
| CPU clock elapsed time | 1.96608 seconds or more |
| All of the following conditions are met | - |
| Internal engine off timer (elapsed time from engine stop) | 10 minutes or more, and less than 30 minutes |
| Auxiliary battery voltage | 8 V or higher |
| Power switch | ON |
| All of the following conditions are met | - |
| Internal engine off timer (elapsed time from engine stop) | 40 minutes or more |
| Auxiliary battery voltage | 8 V or higher |
| Power switch | ON |
TYPICAL MALFUNCTION THRESHOLDS
Case 1| One of the following conditions is met | Condition A, B or C |
| A. Both of the following conditions are met | Condition (a) and (b) |
| (a) CPU clock elapsed time | 1.96608 seconds or more, and less than 8.323072 seconds |
| (b) Internal engine off timer | 9.375 seconds or more |
| B. Both of the following conditions are met | Condition (c) and (d) |
| (c) CPU clock elapsed time | 8.323072 to 10.420224 seconds |
| (d) Internal engine off timer | 18.75 seconds or more |
| C. Both of the following conditions are met | Condition (e) and (f) |
| (e) CPU clock elapsed time | More than 10.420224 seconds |
| (f) Internal engine off timer | Less than 9.375 seconds |
| ECM started by internal engine off timer last trip | Yes |
| ECM started by internal engine off timer last trip | No |
CONFIRMATION DRIVING PATTERN
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) and turn the Techstream on.
-
Put the engine in inspection mode (maintenance mode).
Click here
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- Start the engine and warm it up.
- Turn the power switch off and wait for at least 15 seconds.
- Turn the power switch on (IG) and turn the Techstream on.
-
Put the engine in inspection mode (maintenance mode).
Click here
- Start the engine.
- Stop the engine and leave the vehicle for 60 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P2610.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
-
If the judgment result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
CAUTION / NOTICE / HINT
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 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.
Click here
|
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| 2. | CHECK WHETHER DTC OUTPUT RECURS (DTC P2610) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs.
Click here
(e) Turn the power switch off and wait for at least 30 seconds.
(f) Turn the power switch on (IG).
(g) Turn the Techstream on.
(h) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
Powertrain > Engine and ECT > Trouble Codes(j) If no pending DTC is output, the repair has been successfully completed.
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