Exhaust Vibration/Noise - Exhaust Flow Control System Malfunction
Exhaust Vibration/Noise - Exhaust Flow Control System Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach. Initial Inspection and Diagnostic Overview
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
Exhaust tail pipe flow valve control module receives throttle position sensor and RPM information via serial data from powertrain control module (PCM). The exhaust tail pipe flow valve control module uses this information to determine if to command exhaust tail pipe flow control valve solenoid ON or OFF. When commanded OFF the exhaust tail pipe flow control valve solenoid allows vacuum to flow to close exhaust valve.
Reference Information
Schematic Reference
Exhaust System Schematics
Connector End View Reference
Exhaust System Connector End Views
Electrical Information Reference
* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs
Scan Tool Reference
Scan Tool Data List for exhaust tail pipe flow valve control module
Circuit/System Testing
1. Ignition OFF, disconnect the exhaust tail pipe flow control valve solenoid connector.
2. Ignition ON, use scan tool to command exhaust flow control relay ON, measure for 10 volts or above between the exhaust tail pipe flow control valve solenoid supply voltage circuit and ground.
^ If under 10 volts, test for open/high resistance in exhaust tail pipe flow control valve solenoid supply voltage circuit. If circuit test normal replace the exhaust tail pipe flow valve control module.
3. Connect a test lamp between the exhaust tail pipe flow control valve solenoid supply voltage circuit and ground circuit. Verify that the test lamp illuminates.
^ If the test lamp does not illuminate, test the ground circuit for open or high resistance.
4. If all circuits test normal replace the exhaust tail pipe flow control valve solenoid.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
* Exhaust Tail Pipe Flow Control Valve Solenoid Replacement
* Programing and Relearning.