Nissan 100NX N14 silhouetteN14

E.G.R. SYSTEM - Inspection

EF & EC-720prose procedure

Terminal 12 availability differs: CD17 = No, CD20 = Yes.

Continued from EF & EC-719

Inspection

ENTIRE SYSTEM

  1. 1
    Check the vacuum hoses for loosening, flatting damage or improper connections.
  2. 2
    Warm up engine sufficiently.
  3. 3
    Place your finger on E.G.R. control valve diaphragm to ensure that the valve functions while racing engine.
    Take care not to let your finger get caught between diaphragm and E.G.R. control valve body.
    Make sure that all harness connectors are connected securely.
    Illustration of a hand placing a finger on the diaphragm of the E.G.R. control valve to check valve function while racing the engine.
    SEF243G

CONTROL UNIT OUTPUT SIGNAL

  1. 1
    Check voltage between control unit terminals 10, 12 and ground.
    Diagram showing the control unit harness connector with terminals 10 and 12 probed by a meter while the engine is running. Labels: 'Control unit harness connector', terminal numbers '10' and '12', 'Engine running'.
    SEC403B

Voltage of control unit terminals 10, 12

Below 60 (140)
Voltage of control unit terminals 10, 12Battery voltage
Above 60 (140)
Voltage of control unit terminals 10, 120V
Terminal availability

Terminal availability

10
CD17Yes
CD20Yes
12
CD17No
CD20Yes

E.G.R. CONTROL VALVE

  1. 1
    Supply the E.G.R. control valve with a vacuum of 40.0 kPa (400 mbar, 300 mmHg, 11.81 inHg) using a handy vacuum pump.
    Illustration of an E.G.R. control valve connected to a handy vacuum pump used to supply vacuum to the valve. Label: 'E.G.R. control valve'.
    SEF820F
  2. 2
    Place a finger on the diaphragm of the valve, and make sure that the diaphragm lifts up and down in response to the vacuum leading to the valve.
    Do not supply the valve with an excessively high vacuum.
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