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Fuel Rail Pressure Sensor Circuit – Out of Range High
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 118 PID: FMI: LAMP: Red SRT: |
Fuel Rail Pressure Sensor Circuit – Out of Range High. The fuel rail pressure is high. |
The Centinel™ system will not function. |
|
Fuel Rail Pressure Sensor |
 |
Circuit Description
The fuel rail pressure sensor monitors the fuel rail pressure. When the sensor fails high or low, the fuel rail pressure sensor fault will occur.
Component Location
The fuel rail pressure sensor is located on the fuel connecting block on the Centinel™ oil control valve mounting bracket.
Cautions and Warnings
 CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
|
CAUTION To avoid damaging a new Centinel™ control module, all other active fault codes must be investigated prior to replacing the Centinel™ control module. |
|
CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
|
CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
|
CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
Troubleshooting Steps
| STEPS | SPECIFICATIONS | |
|---|---|---|
| STEP 1. | Check the fuel rail pressure sensor. | |
| STEP 1A. Inspect the fuel rail pressure sensor and Centinel™ harness connectors. | No damaged pins | |
| STEP 1B. Check the Centinel™ control module fuel rail pressure sensor supply voltage. | 4.75 to 5.25 VDC | |
| STEP 1C. Check the fuel rail pressure sensor for an open. | Less than 2M ohms | |
| STEP 2. | Check the Centinel™ harness. | |
| STEP 2A. Inspect the Centinel™ harness and the Centinel™ control module connectors. | No damaged pins | |
| STEP 2B. Check for an open circuit. | Less than 10 ohms | |
| STEP 2C. Check for a short circuit to ground. | More than 1k ohms | |
| STEP 2D. Check for a short circuit from pin to pin. | More than 1k ohms | |
| STEP 3. | Clear the fault codes. | |
| STEP 3A. Disable the fault code. | Fault Code 118 inactive | |
Guided Step 1 – Check the fuel rail pressure sensor.
| Guided Step 1A – Inspect the fuel rail pressure sensor and the Centinel™ harness connector. | |
|---|---|
Conditions
Action
For general inspection techniques, refer to Component Connector and Pin Inspection, Procedure 019-361. |
|
| OK | NOT OK |
|
No damaged pins |
Repair the damaged pins Repair or replace the Centinel™ harness or the fuel rail pressure sensor, whichever has damaged pins. |
| Guided Step 1B – Check the Centinel™ control module fuel rail pressure sensor supply voltage. | |
|---|---|
Conditions
Action
Refer to the wiring diagram for connector pin identification. |
|
| OK | NOT OK |
|
4.75 to 5.25 VDC |
Replace the harness or Centinel™ control module Refer to Procedure 019-130. |
| Guided Step 1C – Check the fuel rail pressure sensor for an open. | |
|---|---|
Conditions
Action
Refer to the wiring diagram for connector pin identification. For general resistance measurement techniques, refer to the Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360. |
|
| OK | NOT OK |
|
Less than 2M ohms |
Replace the fuel rail pressure sensor Refer to Procedure 019-115. |
Guided Step 2 – Check the Centinel™ harness.
|
CAUTION To avoid damaging a new Centinel™ control module, all other active fault codes must be investigated prior to replacing the Centinel™ control module. |
| Guided Step 2A – Inspect the Centinel™ harness and Centinel™ control module connectors. |
|
|---|---|
Conditions
Action
For general inspection techniques, refer to Component Connector and Pin Inspection, Procedure 019-361. |
|
| OK | NOT OK |
|
No damaged pins |
Repair the damaged pins Repair or replace the Centinel™ harness or the Centinel™ control module, whichever has the damaged pins. |
|
CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
| Guided Step 2B – Check for an open circuit. | |
|---|---|
Conditions
Action
Refer to the wiring diagram for connector pin identification. For general resistance measurement techniques, refer to the Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360. |
|
| OK | NOT OK |
|
Less than 10 ohms |
Repair or replace the Centinel™ harness Replace the Centinel™ harness. Refer to Procedure 019-131. |
|
CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
| Guided Step 2C – Check for a short circuit to ground. | |
|---|---|
Conditions
Action
Refer to the wiring diagram for connector pin identification. For general resistance measurement techniques, refer to the Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360. |
|
| OK | NOT OK |
|
More than 1k ohms |
Replace the Centinel™ harness Replace the Centinel™ harness. Refer to Procedure 019-131. |
|
CAUTION To avoid pin and harness damage, use the following test leads when taking measurements: |
| Guided Step 2D – Check for a short circuit from pin to pin. | |
|---|---|
Conditions
Action
Refer to the wiring diagram for connector pin identification. For general resistance measurement techniques, refer to the Resistance Measurements Using a Multimeter and Wiring Diagram, Procedure 019-360. |
|
| OK | NOT OK |
|
More than 1k ohms |
Replace the Centinel™ harness Replace the Centinel™ harness. Refer to Procedure 019-131. |
Guided Step 3 – Clear the fault codes.
| Guided Step 3A – Disable the fault code. | |
|---|---|
Conditions
Action
|
|
| OK | NOT OK |
|
Fault Code 118 inactive or red light off |
Return to troubleshooting steps or contact your local Cummins Authorized Repair Location if all the steps have been completed and checked again. |
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