P2610

DTC P2610

DESCRIPTION
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.

The ECM monitors its ability to read and write to the memory. It also monitors a timing function. The ECM performs an intrusive test to confirm that the APP signals are not shorted together. The ECM accomplishes this by pulling the APP sensor 2 low momentarily and looking for sensor 1 to also be pulled low.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC P0602 Control Module Not Programmed
- DTC P0606 Control Module Internal Performance
- DTC P060B Control Module Analog to Digital Performance
- DTC P061C Control Module Engine Speed Performance
- DTC P062C Control Module Vehicle Speed Performance
- DTC P062F Control Module Long Term Memory Performance
- DTC P2610 Control Module Ignition Off Timer Performance

CONDITIONS FOR RUNNING THE DTC

P0602
The following conditions must be met:
- The ignition switch is ON.
- The controller is identified as a service replacement ECM.

P0606
The following conditions must be met:
- The ignition switch is in Run or Crank.
- The power take-off (PTO) is inactive.
- The cruise control is inactive.

P060B
- The engine speed is more than 400 RPM.
- The ECM is powered up.

P061C
- The ignition is ON.
- The engine speed is less than 1,300 RPM.

P062C
The ignition is ON.

P062F
The ignition is ON.

P2610
The ECM is powered up.

CONDITIONS FOR SETTING THE DTC

P0602
- The ECM has not been programmed at Key On and Engine Off for 0.1 second.
- This diagnostic runs continuously.

P0606
- The ECM detects a microprocessor undervoltage or overvoltage condition.OR
- The ECM detects an internal bus communication error.OR
- The ECM detects an internal clock error.OR
- The ECM detects an internal injector control error.
- All tests run in less than 1 second.
- This DTC runs continuously.

P060B
- The ECM detects an incorrect internal analog/digital (A/D) signal for less than 1 second.
- This DTC runs continuously.

P061C
- The ECM detects that there is a difference between the CKP engine speed and the calculated engine speed of more than 320 RPM for less than 1 second.
- This diagnostic runs continuously.

P062C
- The ECM detects a fault in the ship that calculates redundant vehicle speed for more than 1 second.
- This DTC runs continuously.

P062F
- The ECM did not complete the last electronic erasable programmable read only memory (EEPROM) write event during the last ECM power down.
- This diagnostic runs once per ignition cycle at power up.

P2610
- The ignition off-timer is less than 0 second.OR
- The ignition off-timer is less than 5 seconds for more than 10 seconds.OR
- The ignition off-timer is unchanged for 60 seconds.OR
- The ignition off-timer is not incrementing in 1-second intervals.

ACTION TAKEN WHEN THE DTC SETS

P0602, P0606, P060B, P061C, P062C and P062F
- The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.

P2610
- The control module illuminates the MIL on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
- If the diagnostic reports a failure, the control module uses a cold start model based on the engine coolant temperature and intake air temperature at engine start-up. Using the cold start model ensures that the control module is able to determine how much time has elapsed between ignition cycles.

CONDITIONS FOR CLEARING THE MIL/DTC

P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F and P2610
- The control module turns OFF the MIL after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

CIRCUIT/SYSTEM TESTING
1. Observe the DTCs with the scan tool.
- If DTC P0602 or P062F is set, attempt to program the ECM before replacing the ECM. Refer to Service Programming System (SPS).
2. Test the voltage and ground circuits to the control module for the following:
- A short
- An open
- High resistance
- If all circuits test OK, replace the ECM.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ECM replacement, setup, and programming.