Engine Controls - System & Component Testing - 4 Cyl & V6: Diagnosis Nissan Altima L31

EVAP System Leak Test

Note. DO NOT start engine during testing procedure.

1. Using CONSULT-II Attach EVAP service port adapter securely to EVAP service port. Attach pressure pump and hose. Turn ignition on. Using CONSULT-II in WORK SUPPORT MODE select EVAP SYSTEM CLOSE. Touch START. A bar graph should appear, using pressure pump apply pressure until pressure indicator reaches middle of graph. Remove EVAP service port adapter along with pump. Locate leak using Leak Detector (J41416).
2. Without CONSULT-II Connect suitable pressure pump with gauge to EVAP service port. See «VACUUM DIAGRAMS»(ref-135815) article for location. Using jumper wires, apply battery voltage to EVAP Canister Vent Control Valve (EVAP-CVCV) and vacuum cut valve by-pass valve. (Scheme 86)- (Scheme 92). Apply.2-.4 psi (.01-.03 kg/cm 2 ) of pressure to EVAP service port. Remove pressure pump from EVAP service port. Using Leak Detector (J41416), locate EVAP system leak.

Scheme 86

Scheme 87

Scheme 88

Scheme 89

Scheme 90

Scheme 91

Scheme 92

IDLE AIR CONTROL VALVE-FAST IDLE CONTROL DEVICE SYSTEM TEST

Note. Altima, I35, Maxima, Pathfinder, QX4 and Sentra are not equipped with idle air control valve-fast idle control device.

See also:
• WIRING DIAGRAMS