TROUBLE DIAGNOSES - Consult (Cont'd)
EF & EC-48spec tableConsult (Cont'd)
NEUTRAL SW
UNITON/OFF
DESCRIPTION of TESTIndicates ON/OFF condition from the neutral switch signal. With the ignition switch "ON" (engine stopped). Put shift lever in and out of Neutral and Park.
SPECIFICATIONON - Shift lever "P" or "N" OFF - Except above
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Neutral switch
PW/ST SIGNAL
UNITON/OFF
DESCRIPTION of TESTON/OFF condition of the power steering oil pressure switch determined from the power steering oil pressure signal. After warming up, idle the engine and turn steering wheel to full lock in both directions and back to neutral position.
SPECIFICATIONOFF - Steering wheel in neutral (forward direction) ON - Steering wheel turned
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Power steering oil pressure switch
LOAD SIGNAL
UNITON/OFF
DESCRIPTION of TESTIndicates the ON/OFF condition from the electrical load signal.
SPECIFICATION—
CHECK ITEM WHEN OUTSIDE SPEC.—
INJ PULSE
UNITmsec
DESCRIPTION of TESTIndicates the injection pulse width computed by the control unit according to the input signal. Warm-up engine and idle then run at 2,000 rpm. A/C switch "OFF". Shift lever "N" No-load
SPECIFICATION2.3 - 3.3 msec (at idle) 1.8 - 2.8 msec (at 2,000 rpm)
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Injector • Air flow meter • Intake air system
IGN TIMING
UNITBTDC (°)
DESCRIPTION of TESTIndicates the ignition time computed by the control unit according to the input signal. Warm-up engine, idle then run at 2,000 rpm. A/C switch "OFF" Shift lever "N" No-load
SPECIFICATION15° B.T.D.C. (at idle) >20°C B.T.D.C.
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Crank angle sensor
A.A.C. valve
UNIT% or step
DESCRIPTION of TESTIndicates the AAC valve control value computed by the control unit according to the input signal. Warm-up engine, idle then run at 2,000 rpm. A/C switch "OFF" Shift lever "N" No-load
SPECIFICATION10-40% at idle
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • A.A.C. valve When the engine is stopped a value is indicated.
A/F ALPHA
UNIT%
DESCRIPTION of TESTThe mean value of the air-fuel ratio feedback correction factor per cycle is indicated. Warm-up engine and maintain at 2,000 rpm. When the engine is stopped, a value is indicated. The data also includes the data for the air/fuel ratio learning control.
SPECIFICATION75 - 125%
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Injector • Air flow meter • Exhaust gas sensor • Canister purge line • Intake air system
AIR COND RELAY
UNITON/OFF
DESCRIPTION of TESTThe air conditioner relay control condition (computed by the control unit according to the input signal) is indicated. Switch air conditioner switch OFF → ON.
SPECIFICATIONOFF → ON
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Air conditioner switch • Air conditioner relay
FUEL PUMP RLY
UNITON/OFF
DESCRIPTION of TESTIndicates the fuel pump relay control condition computed by the control unit according to the input signal. • Turn ignition switch: "ON" (operate for 5 seconds) • Engine running and cranking • When engine is stopped (stops in 1.0 seconds) Except as shown above
SPECIFICATIONON
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Fuel pump relay
RADIATOR FAN
UNITON/OFF HI/ LOW/ OFF
DESCRIPTION of TESTThe control condition of the radiator fan (computed by the control unit according to the input signal) is indicated. After warming up, idle the engine. • A/C switch "OFF"
SPECIFICATIONOFF... stop ON... Operation (Vehicle with single step fan) HI... High speed operation LOW... Low speed operation OFF... Stop (Vehicles with 2-speed operation).
CHECK ITEM WHEN OUTSIDE SPEC.• Harness and connector • Radiator fan relay • Radiator fan.