Nissan 100NX N14 silhouetteN14

Trouble Diagnoses — Consult (Cont'd)

EF & EC-420spec table

Monitor item marked ** applies to models with turbocharger (SR20DET) only; * applies to vehicles with catalyzer only. Air flow meter and fuel pump relay specs differ between SR20DE and SR20DET.

Consult (Cont'd)

DATA MONITOR MODE

Data Monitor Mode

CAS. RPM (REF)
Condition• Tachometer: Connect • Run engine and compare tachometer indication with the CONSULT value.
SpecificationAlmost the same speed as the CONSULT value.
Check Item When Outside Spec.• Harness and connector • Crank angle sensor
AIR FLOW MTR
Condition• Engine: After warming up, idle the engine • A/C switch "OFF" • Shift lever "N" / Idle
SpecificationSR20DE: 1.3 - 1.8V SR20DET: 1.0 - 1.5V
Check Item When Outside Spec.• Harness and connector • Air flow meter
AIR FLOW MTR
Condition• Engine: After warming up, idle the engine • A/C switch "OFF" • Shift lever "N" / 2,000 rpm
SpecificationSR20DE: 1.6 - 2.1V SR20DET: 1.3 - 1.8V
Check Item When Outside Spec.• Harness and connector • Air flow meter
ENG TEMP SEN
Condition• Engine: After warming up
SpecificationMore than 70°C (158°F)
Check Item When Outside Spec.• Harness and connector • Engine temperature sensor
EXH GAS SEN**
Condition• Engine: After warming up
Specification0 - 0.3V ↔ Approx. 0.6 - 1.0V
Check Item When Outside Spec.• Harness and connector • Exhaust gas sensor
M/R F/C MNT**
Condition• Engine: After warming up / Maintaining engine speed at 2,000 rpm
SpecificationLEAN ↔ RICH Changes more than 5 times during 10 seconds.
Check Item When Outside Spec.• Intake air leaks • Injectors
CAR SPEED SEN
Condition• Turn drive wheels and compare speedometer indication with the CONSULT value
SpecificationAlmost the same speed as the CONSULT value
Check Item When Outside Spec.• Harness and connector • Vehicle speed sensor
BATTERY VOLT
Condition• Ignition switch: ON (Engine stopped)
Specification11 - 14V
Check Item When Outside Spec.• Battery • E.C.U. power supply circuit
THROTTLE SEN
Condition• Ignition switch: ON (Engine stopped) / Throttle valve fully closed
Specification0.45 - 0.55V
Check Item When Outside Spec.• Harness and connector • Throttle sensor • Throttle sensor adjustment
THROTTLE SEN
Condition• Ignition switch: ON (Engine stopped) / Throttle valve fully opened
SpecificationApprox. 4.0V
Check Item When Outside Spec.• Harness and connector • Throttle sensor • Throttle sensor adjustment
START SIGNAL
Condition• Ignition switch: ON → START
SpecificationOFF → ON
Check Item When Outside Spec.• Harness and connector • Starter switch
IDLE POSITION
Condition• Ignition switch: ON (Engine stopped) / Throttle valve: Idle position
SpecificationON
Check Item When Outside Spec.• Harness and connector • Throttle sensor • Throttle sensor adjustment
IDLE POSITION
Condition• Ignition switch: ON (Engine stopped) / Throttle valve: Slightly open
SpecificationOFF
Check Item When Outside Spec.• Harness and connector • Throttle sensor • Throttle sensor adjustment
AIR COND SIG
Condition• Engine: After warming up, idle the engine / A/C switch "OFF"
SpecificationOFF
Check Item When Outside Spec.• Harness and connector • Air conditioner switch
AIR COND SIG
Condition• Engine: After warming up, idle the engine / A/C switch "ON"
SpecificationON
Check Item When Outside Spec.• Harness and connector • Air conditioner switch
NEUTRAL SW
Condition• Ignition switch: ON / Shift lever "P" or "N"
SpecificationON
Check Item When Outside Spec.• Harness and connector • Neutral switch
NEUTRAL SW
Condition• Ignition switch: ON / Except above
SpecificationOFF
Check Item When Outside Spec.• Harness and connector • Neutral switch
PW/ST SIGNAL
Condition• Engine: After warming up, idle the engine / Steering wheel in neutral (forward direction)
SpecificationOFF
Check Item When Outside Spec.• Harness and connector • Power steering oil pressure switch
PW/ST SIGNAL
Condition• Engine: After warming up, idle the engine / Steering wheel is turned
SpecificationON
Check Item When Outside Spec.• Harness and connector • Power steering oil pressure switch
FUEL PUMP RLY
Condition• Ignition switch: ON (For SR20DE: Operates for 5 seconds, SR20DET: Operates for 1 second) • Engine running and cranking • When engine is stopped (stops in 1.0 seconds)
SpecificationON
Check Item When Outside Spec.• Harness and connector • Fuel pump relay
FUEL PUMP RLY
ConditionExcept as shown above
SpecificationOFF
Check Item When Outside Spec.• Harness and connector • Fuel pump relay

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