Overview
| CODE | REASON | EFFECT |
| Fault Code: 1696 PID: S232 SPN: 3513 FMI: 4/4 LAMP: Amber SRT: |
Low voltage detected at sensor supply number 5 circuit in the OEM harness.
|
The engine will operate in Limp Home mode. |
Circuit Description
The sensor supply 5 circuit of the engine control module (ECM) provides a 5 volt supply for various aftertreatment and OEM sensors.
Component Location
Sensor Supply 5 originates in the OEM connector portion of the ECM.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the sensor supply 5 signal voltage was out of range low.
Action Taken When the Fault Code is Active
- The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.
- The engine will have limp-home throttle control only.
Conditions for Clearing the Fault Code
- To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
- The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
- The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
- For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
- The “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.
Shop Talk
- Low voltage on the 5 volt supply wire can be caused by a short circuit to ground in a supply wire, a short circuit between a supply wire and a return wire, a damaged sensor, or a damaged ECM power supply.
- Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.
For intermittent power supply and datalink communication issues with Aftertreatment Components, it is highly recommended that the OEM Power Distribution Center fuses and relays be thoroughly checked for loose, missing or intermittent connections.
Troubleshooting Summary
Solution: S00000544
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Inspect the pins and connectors for damage.
- Perform the following actions one at a time:
- Disconnect the OEM pressure sensor from the OEM wiring harness.
- Disconnect the spare OEM pressure sensor from the OEM wiring harness.
- Disconnect the accelerator pedal position sensor from the OEM wiring harness.
- Disconnect the ambient air temperature sensor from the OEM wiring harness.
- Disconnect the aftertreatment DPF differential pressure sensor from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the OEM wiring harness.
- Disconnect the engine coolant level sensor from the OEM wiring harness.
- Disconnect the remote accelerator pedal position sensor from the OEM wiring harness.
- Disconnect the fan speed sensor from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the OEM wiring harness.
- Disconnect the fuel level sensor from the OEM wiring harness.
- Disconnect the vehicle speed sensor from the OEM wiring harness.
- Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.
Specification
- If the fault code goes inactive when a component is disconnected, then a malfunctioning sensor supply component has been detected.
Linked Solutions
- None
Repair
Repair or replace only the components that were found to be out of specification.
- Replace the OEM pressure sensor.
Refer to OEM Service Manual
- Replace the spare OEM pressure sensor.
Refer to OEM Service Manual
- Replace accelerator pedal or lever position sensor.
Refer to OEM Service Manual
- Replace the ambient air temperature sensor.
Refer to OEM Service Manual
- Replace aftertreatment DPF differential pressure sensor.
- Replace the aftertreatment diesel exhaust fluid dosing valve.
- Replace engine coolant level sensor.
- Replace the remote accelerator pedal assembly.
Refer to OEM Service Manual
- Replace the fan speed sensor.
Refer to OEM Service Manual
- Replace aftertreatment diesel exhaust fluid dosing unit.
- Replace the fuel level sensor.
Refer to OEM Service Manual
- Replace the vehicle speed sensor.
Refer to OEM Service Manual
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the “Conditions for Clearing the Fault Code” found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00001229
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the OEM wiring harness connector from the ECM.
- Disconnect the OEM pressure sensor from the OEM wiring harness.
- Disconnect the ambient air temperature sensor from the OEM wiring harness.
- Disconnect the accelerator pedal position sensor from the OEM wiring harness.
- Disconnect the fan speed sensor from the OEM wiring harness.
- Disconnect the vehicle speed sensor from the OEM wiring harness.
- Disconnect the engine coolant level sensor from the OEM wiring harness.
- Disconnect the remote accelerator pedal or lever from the OEM wiring harness.
- Disconnect the aftertreatment DPF differential pressure sensor from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid tank level sensor from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid pressure sensor from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance and check for a short circuit between the 5-VDC SUPPLY pin and engine block ground.
Specification
- A malfunctioning OEM wiring harness has been detected if the resistance is less than the following specification: 100k Ω
Linked Solutions
- None
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the “Conditions for Clearing the Fault Code” found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00000542
Verification
Conditions
- Turn keyswitch OFF.
- Disconnect the OEM wiring harness connector from the ECM.
- Disconnect the OEM pressure sensor from the OEM wiring harness.
- Disconnect the ambient air temperature sensor from the OEM wiring harness.
- Disconnect the accelerator pedal position sensor from the OEM wiring harness.
- Disconnect the fan speed sensor from the OEM wiring harness.
- Disconnect the vehicle speed sensor from the OEM wiring harness.
- Disconnect the engine coolant level sensor from the OEM wiring harness.
- Disconnect the remote accelerator pedal or lever from the OEM wiring harness.
- Disconnect the aftertreatment DPF differential pressure sensor from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid tank level sensor from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid dosing unit from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid dosing valve from the OEM wiring harness.
- Disconnect the aftertreatment diesel exhaust fluid pressure sensor from the OEM wiring harness.
Action
- Inspect the pins and connectors for damage.
- Measure the resistance and check for a short circuit between the 5-VDC SUPPLY pin and all other pins in the OEM wiring harness ECM connector.
Specification
- A malfunctioning OEM wiring harness has been detected if the resistance is less than the following specification: 100k Ω
Linked Solutions
- None
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the “Conditions for Clearing the Fault Code” found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
Solution: S00000443
Verification
Conditions
- Connect all components.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revision listed in the ECM calibration revision history for applicable changes.
Specification
- If a calibration update for this fault code is available, the ECM calibration revision must be that revision or higher.
Linked Solutions
- None
Repair
- Prior to downloading the ECM calibration, check to see that all job images and all other troubleshooting has been documented as downloading an ECM calibration will remove the fault codes on the ECM.
- Download the updated ECM calibration code.
Validation
- Connect all components
- Connect the recommended Cummins® electronic service tool or equivalent.
- Disable the fault code.
- Operate the engine within the “Conditions for Clearing the Fault Code” found in the Overview section of the troubleshooting procedure.
- Verify that the fault code is no longer active.
- Check ECM Calibration Revision History
- Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.
- Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.
- Refer to ECM Calibration Revision History Database.
If all steps have been completed and no root cause has been identified, then follow the technical escalation process.