Exhaust Gas Recirculation Vacuum Regulator Solenoid Valve, Checking
Diagnostic Procedures
Exhaust Gas Recirculation Vacuum Regulator Solenoid Valve, Checking
• Cylinder bank 1 is located in direction of travel, right.
• Cylinder bank 2 is located in direction of travel, left.
Special tools, testers and auxiliary items required
• Multimeter (VAG1526) or Multimeter (VAG1715)
• Connector test kit (VAG1594)
• Wiring diagram
Test Prerequisites
• Fuses in E-box (plenum chamber, left) must be OK:
• Battery voltage must be at least 11.5 volts.
• All electrical consumers such as, for example, lights and rear window defroster must be switched off.
• For vehicles with automatic transmission, selector lever must be in P.
• If vehicle is equipped with an A/C system, it must be switched off.
• Ground (GND) connections between engine and chassis must be OK.
• No leaks on intake or exhaust side.
• Vacuum hoses must be properly sealed.
• Ignition is switched off.
Cylinder bank 1: Check EGR Vacuum Regulator Solenoid Valve (N18).
Cylinder bank 2: Check Valve 2 for EGR (N213).
Exhaust Gas Recirculation Regulator Solenoid Valve, Test Sequence
- Disconnect 2-pin connector at EGR Vacuum Regulator Solenoid Valve (N18) (- A -)..
- Measure resistance between terminals of valve.
Specified value: 14.0...20.0 ohms
• Resistance at room temperature is in lower specified range, resistance at operating temperature is in upper specified range.
If specified value is not obtained:
- Replace EGR Vacuum Regulator Solenoid Valve (N18).
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained:
- Switch ignition on.
- Measure voltage supply of valve at connector terminal 1 and at engine Ground (GND).
Specified value: approx. battery voltage
- Switch ignition off.
If specified value is not obtained:
- Check wire according to wiring diagram:
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained, check Control Module Wires.
Control Module Wires, Checking
- Connect test box ((VAG1598/42)) to Engine Control Module (ECM) (J623) wiring harness using adapter cable ((VAG1598/39-2)) , connecting test box for wiring test.
- Check wire between test box and connector for open circuit according to wiring diagram.
Terminal 2+socket 13
Wire resistance: max. 1.5ohms
- Also check wire for short circuit to vehicle Ground (GND) and to B+.
Specified value: infinite ohms
If no malfunctions are found in wires:
- Replace Engine Control Module (ECM) (J623) --> [ Engine Control Modules, Replacing ] Engine Control Modules, Replacing.
Exhaust Gas Recirculation Valve 2 N213, Test Sequence
- Disconnect 2-pin connector at Valve 2 for EGR (N213) (- B -)..
- Measure resistance between terminals of valve.
Specified value: 14.0...20.0 ohms
• Resistance at room temperature is in lower specified range, resistance at operating temperature is in upper specified range.
If specified value is not obtained:
- Replace Valve 2 for EGR (N213).
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained:
- Switch ignition on.
- Measure voltage supply of valve at connector terminal 1 and at engine Ground (GND).
Specified value: approx. battery voltage
- Switch ignition off.
If specified value is not obtained:
- Check wire according to wiring diagram:
- Erase DTC memory of Engine Control Module (ECM) --> [ Diagnostic Mode 04 - Erase DTC Memory ] .
- Generate readiness code --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
If specified value is obtained, check Control Module Wires.
Control Module Wires, Checking
- Connect test box ((VAG1598/42)) to Engine Control Module 2 (J624) wiring harness using adapter cable ((VAG1598/39-2)) , connecting test box for wiring test.
- Check wire between test box and connector for open circuit according to wiring diagram.
Terminal 2+socket 13
Wire resistance: max. 1.5ohms
- Also check wire for short circuit to vehicle Ground (GND) and to B+.
Specified value: infinite ohms
If no malfunctions are found in wires:
- Replace Engine Control Module 2 (J624) --> [ Engine Control Modules, Replacing ] Engine Control Modules, Replacing.