Injector Circuit – Number 6
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Overview
CODE | REASON | EFFECT |
Fault Code: 314 M11 PID: S006 SPN: 739 FMI: 6 LAMP: Yellow SRT: 00-604 |
Current detected at number 6 injector return pin 4 of the actuator harness connector when the voltage supply at pin 13 of the actuator harness connector is off. | Engine speed derate to 1400 to 1600 rpm. Current to the injector is shut off. |
Injector Circuit – Number 6 |
Circuit Description
The injector solenoid valves are actuated by the electronic control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a supply wire and a return wire. An electrical pulse is sent to the injector from the ECM on the supply wire and returns to the ECM on the return wire after actuating the solenoid. Each solenoid valve is normally open, and it is only closed by an electrical pulse from the ECM during fuel injection and metering.
Component Location
There are two pieces to an M11 actuator harness – one internal and the other external. The external portion of the actuator harness extends from the C connector port in the ECM to the backside of the rocker lever housing. The external harness connects to the internal harness at a 12-pin connector. The internal actuator harness runs along the inside of the rocker lever housing on the right side. It has six connectors spaced along its length – one for each injector solenoid. These connectors attach to the pigtail connector on each injector.
Cautions and Warnings
WARNING
The injector solenoids receive high voltage when the engine is operating. To reduce the possibility of personal injury from electrical shock, do not wear jewelry or damp clothing, and do not touch the injector solenoids or the solenoid wires when the engine is operating.
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CAUTION
To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement: |
CAUTION
To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM. |
Troubleshooting Steps
STEPS | SPECIFICATIONS | |
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STEP 1. | Check the internal actuator harness. | |
STEP 1A. Inspect the internal and external actuator harness pass-through connector pins. | No damaged pins | |
STEP 1B. Read the fault codes. | Fault Code 314 active | |
STEP 1C. Check for a short circuit from pin to pin. | More than 100k ohms | |
STEP 2. | Check the external actuator harness. | |
STEP 2A. Inspect the actuator harness and the ECM connector pins. | No damaged pins | |
STEP 2B. Read the fault codes. | Fault Code 314 active | |
STEP 2C. Check for a short circuit from pin to pin. | More than 100k ohms | |
STEP 3. | Check the ECM. | |
STEP 3A. Check the ECM response. | Fault Code 314 inactive | |
STEP 4. | Clear the fault codes. | |
STEP 4A. Disable the fault code. | Fault Code 314 inactive | |
STEP 4B. Clear the inactive fault codes. | All fault codes cleared |
Guided Step 1 – Check the internal actuator harness.
WARNING
The injector solenoids receive high voltage when the engine is operating. To reduce the possibility of personal injury from electrical shock, do not wear jewelry or damp clothing, and do not touch the injector solenoids or the solenoid wires when the engine is operating.
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Guided Step 1A – Inspect the internal and external actuator harness pass-through connector pins. | |
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Conditions
Action
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OK | NOT OK |
No damaged pins | Repair the damaged pins. |
Guided Step 1B – Read the fault codes. | |
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Conditions
Action
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|
OK | NOT OK |
Fault Code 314 active | Repair complete. |
WARNING
The injector solenoids receive high voltage when the engine is operating. To reduce the possibility of personal injury from electrical shock, do not wear jewelry or damp clothing, and do not touch the injector solenoids or the solenoid wires when the engine is operating.
|
CAUTION
To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement: |
Guided Step 1C – Check for a short circuit from pin to pin. | ||
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Conditions
Action
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OK | NOT OK | |
More than 100k ohms | Replace the internal actuator harness. Refer to Procedure 019-043. | |
Guided Step 2 – Check the external actuator harness.
WARNING
The injector solenoids receive high voltage when the engine is operating. To reduce the possibility of personal injury from electrical shock, do not wear jewelry or damp clothing, and do not touch the injector solenoids or the solenoid wires when the engine is operating.
|
CAUTION
To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM. |
Guided Step 2A – Inspect the actuator harness and the ECM connector pins. | |
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Conditions
Action
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OK | NOT OK |
No damaged pins | Repair the damaged pins.
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Guided Step 2B – Read the fault codes. | |
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Conditions
Action
|
|
OK | NOT OK |
Fault Code 314 active | Repair complete. |
WARNING
The injector solenoids receive high voltage when the engine is operating. To reduce the possibility of personal injury from electrical shock, do not wear jewelry or damp clothing, and do not touch the injector solenoids or the solenoid wires when the engine is operating.
|
CAUTION
To reduce the possibility of pin and harness damage, use the following test lead when taking a measurement: |
Guided Step 2C – Check for a short circuit from pin to pin. | ||
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Conditions
Action
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|
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OK | NOT OK | |
More than 100k ohms | Repair or replace the actuator harness. | |
Guided Step 3 – Check the ECM.
CAUTION
To reduce the possibility of damaging a new ECM, all other active fault codes must be investigated prior to replacing the ECM. |
Guided Step 3A – Check the ECM response. | |
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Conditions
Action
|
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OK | NOT OK |
Fault Code 314 inactive | Replace the ECM. Refer to Procedure 019-031. |
Guided Step 4 – Clear the fault codes.
Guided Step 4A – Disable the fault code. | |
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Conditions
Action
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OK | NOT OK |
Fault Code 314 inactive | Return to the troubleshooting steps or contact your nearest Cummins Authorized Repair Location if all the steps have been completed and checked again. |
Guided Step 4B – Clear the inactive fault codes. | |
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Conditions
Action
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OK | NOT OK |
All fault codes cleared | Troubleshoot any remaining active fault codes. |
Repair complete
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Appropriate troubleshooting chart
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