This document is a Cummins fault 319 troubleshooting manual for a real-time clock power interrupt fault. It explains the circuit description, fault conditions, possible causes, guided electrical checks, ECM calibration review, and clearing procedure using INSITE™.
Official Cummins fault 319 document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250, ISX15 CM2250, GX CM2250, ISF2.8 CM2220, ISF3.8 CM2220, ISB4.5, ISB6.7, ISD4.5, ISD6.7 CM2150, ISL8.9 CM2150, ISM11 CM876 as listed in the associated procedures table |
| System/Group | Real Time Clock Power Circuit / DTCs |
| Publication no. | 4022250, 2883445, 4022178, 4021704, 4022188, 4022190, 4022196 listed by engine model in the associated procedures table |
| Year/Revision | Last Modified: 11-Jun-2010; troubleshooting section Last Modified: 04-Jan-2011 |
| Pages | 14 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Associated Procedures
- Troubleshooting Steps
- Guided Step 1 – Check the real-time clock battery and connections.
- Guided Step 1A – Inspect the ECM and engine harness connector pins.
- Guided Step 1B – Check the real-time clock battery voltage at the ECM harness connector.
- Guided Step 1B-1 – Inspect the real-time clock battery and engine wire harness connector pins.
- Guided Step 2 – Check the battery module harness.
- Guided Step 2A – Check for an open circuit in the engine harness
- Guided Step 2B – Check for a short circuit in the engine harness.
- Guided Step 2C – Check for a short circuit to ground.
- Guided Step 3 – Check ECM calibration and clear fault codes.
- Guided Step 3A – Check if an ECM calibration update is available.
Applicable truck models
The extract identifies this fault document with ISX11.9 CM2250 and ISX15 CM2250 real time clock power circuit coverage, and its associated procedures table also lists ISF2.8 CM2220, ISF3.8 CM2220, ISB4.5, ISB6.7, ISD4.5, ISD6.7 CM2150, ISL8.9 CM2150, ISM11 CM876, and GX CM2250 engine families. The file is useful where the ECM reports Fault Code 319, PID P251, SPN 251, FMI 2/2, with a Maintenance lamp and no performance effect, but inaccurate ECM time and date data. See the manufacturer website at Cummins official website.
Who needs this Cummins fault 319 manual
Workshop technicians, fleet mechanics, and diagnostic tool users need this Cummins fault 319 manual when checking a real-time clock battery, ECM connector pins, engine harness continuity, shorts, calibration status, and fault clearing with INSITE™. It supports decisions on repairing connector damage, replacing the real-time clock battery, repairing the engine wiring harness, or updating ECM calibration.
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