|
EGR Valve Control – Mechanical System Not Responding Properly or Out of Adjustment
|
Overview
| CODE | REASON | EFFECT |
| Fault Code: 2357 PID: S146 SPN: 2791 FMI: 7/7 LAMP: Amber SRT: |
Exhaust Gas Recirculation (EGR) Valve Control – Mechanical System Not Responding Properly or Out of Adjustment. EGR valve motor does not respond or is slow to respond. |
Possible low power. Power will be removed from the EGR valve motor. |
 EGR Valve Control Circuit
|
Circuit Description
The electronic control module (ECM) controls the EGR valve, opening and closing it based on various operating conditions. The EGR valve is opened and closed by a DC motor that receives voltage from the ECM on the EGR valve motor SIGNAL (+) circuit. To open the valve, the motor receives voltage on the EGR valve motor SIGNAL (+) circuit. To close the valve, the motor receives voltage on the EGR valve motor SIGNAL (-) circuit.
Component Location
The EGR valve motor is located on the exhaust side of the engine and is attached to the EGR valve assembly, which is mounted to the exhaust manifold. Refer to Procedure 100-002 for a detailed component location view.
Shop Talk
The ECM monitors the duty cycle of the valve and logs a fault code if the duty cycle is too high. This fault is always set inactive when the keyswitch is turned ON. If there is a failure, the fault code will not be set active until the valve has been actuated. For these reasons, this troubleshooting tree must be used for both active and inactive fault codes. This also means the only sufficient way to make sure the repair is effective, is to run the INSITE™ EGR Valve Test. Running the engine may not be enough to verify the repair was effective.
Possible causes of this fault include:
- Failed EGR valve position sensor; mechanical or electrical failure
- EGR valve assembly failure requiring a high current to operate the valve, such as a stuck or sticking valve.
Refer to Troubleshooting Fault Code t05-2357
;){kind=link}
;){kind=link}