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Symptom: P1610-ENGINE CONTROL RELAY SHUTS OFF TOO EARLY When Monitored and Set Condition: P1610-ENGINE CONTROL RELAY SHUTS OFF TOO EARLY When Monitored: During after-run. Set Condition: The internal ECM timer determines that the Engine Control Relay has shut off before the AFTER-RUN mode of operation has been completed. POSSIBLE CAUSES CHECK FOR OTHER DTCS INTERMITTENT CONDITION SUBSTITUTE ENGINE CONTROL RELAY ENGINE CONTROL RELAY CONTROL CIRCUIT OPEN INTERMITTENTLY ENGINE CONTROL MODULE TEST ACTION APPLICABILITY 1 Turn the ignition on. All Yes → Refer to the Symptom List for diagnosis of the other DTCs before continuing. No → Go To 2 2 NOTE: If the ECM detects and stores a DTC, the ECM also stores the All Yes → Go To 3 No → Go To 5 89 DRIVEABILITY - DIESEL |