EGR Valve 2 and Position Sensor
Diagnostic Procedures
EGR Valve 2 and Position Sensor
Observe all safety precautions: --> [ Safety Precautions ]
View clean working conditions: --> [ Clean Working Conditions ]
Perform a preliminary check to verify the condition: --> [ Preliminary Check ] Preliminary Check.
Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.
For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.
• The EGR Valve 2 and Low Pressure EGR Valve both refer to the same component (N213). Name changes occur in wiring diagrams, parts listings etc. The EGR Position Sensor is part of the N213 valve assembly and is serviced as one component.
Special tools, testers and auxiliary items required
• Multimeter
• Electrical connector test lead set
Test conditions
• Fuse OK
• Battery voltage 12.5 V
• Ignition switched off
Start diagnosis
- Disconnect the EGR Valve 2 and Position Sensor (N213) electrical harness connector.
Checking internal resistance
- Using a multimeter, check the EGR Valve 2 and Position Sensor (N213) terminals 2 and 6 for resistance.
Specified value: 5.6 ohms (± 1 ohm)
- Using a multimeter, check the EGR Valve 2 and Position Sensor (N213) terminals 1 and 5 for resistance.
Specified value: 175.5 ohms (± 40 ohms).
If any of the specified values are Not obtained:
- Replace the EGR Valve 2 and Position Sensor (N213).
If the specification is obtained:
Checking voltage
- Switch the ignition on.
- Using a multimeter, check the EGR Valve 2 and Position Sensor (N213) electrical harness connector terminal 2 to Ground for voltage.
- Using a multimeter, check the EGR Valve 2 and Position Sensor (N213) electrical harness connector terminal 6 to Ground for voltage.
Specified value for each test: Battery voltage.
If the specified value was not obtained:
- Check the EGR Valve 2 and Position Sensor (N213) electrical harness terminal 2 or 6 for an for an open circuit, high resistance or a short circuit.
- Check the wiring connections for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
If the specified value was obtained:
Checking wiring
If the manufacturers test box is being used, perform the following step.
- Install the test box.
If the manufacturers test box is not being used, perform the following step.
- Remove the Motronic Engine Control Module (ECM) (J623).
- Using a multimeter, check the EGR Valve 2 and Position Sensor (N213) electrical harness connector terminal to the Motronic Engine Control Module (ECM) (J623) electrical harness connector T60 terminal for resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
- Check the wiring for high resistance, a short circuit to each other, Battery or Ground.
- If necessary, repair the faulty wiring connection.
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
If no malfunction is detected in the wiring and the voltage was Not OK:
- Replace the Motronic Engine Control Module (ECM) (J623).
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Modes 01 - 09.
2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Modes 01 - 09.
3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.