TROUBLESHOOTING GUIDE
F2-14spec tableFuel-injector remark distinguishes ATX (above 1,500 rpm) from MTX (1,200 rpm).
OUTPUT DEVICES AND ENGINE CONDITION
NOTE
Matrix of output-device state against engine condition. Engine condition columns: Cranking (cold engine); Warming up (during idle); Medium load (Cold / Warm); Acceleration; Heavy load; Deceleration; Idle; IG: ON (engine not running).
Output devices and engine condition
Fuel injector — fuel injection amount
Cranking (cold engine)Rich
Warming up (during idle)Rich
Medium load — ColdRich
Medium load — WarmNormal
AccelerationRich
Heavy loadRich
DecelerationFuel cut*
IdleNormal
IG: ON (engine not running)No injection
Remark* Engine speed: Above 1,500 rpm (ATX) / 1,200 rpm (MTX)
Fuel pump relay
Cranking (cold engine)ON
Warming up (during idle)ON
Medium load — ColdON
Medium load — WarmON
AccelerationON
Heavy loadON
DecelerationON
IdleON
IG: ON (engine not running)OFF
Remark—
Ignition control module
Cranking (cold engine)Fixed at BTDC 7°
Warming up (during idle)Advanced: depends on engine condition
Medium load — ColdAdvanced: depends on engine condition
Medium load — WarmAdvanced: depends on engine condition
AccelerationAdvanced: depends on engine condition
Heavy loadAdvanced: depends on engine condition
DecelerationAdvanced: depends on engine condition
IdleAdvanced: depends on engine condition
IG: ON (engine not running)OFF
Remark—
Solenoid valve — Purge control
Cranking (cold engine)OFF
Warming up (during idle)OFF
Medium load — ColdOFF
Medium load — WarmON (Purge)
AccelerationON (Purge)
Heavy loadOFF
DecelerationOFF
IdleOFF
IG: ON (engine not running)OFF
Remark—
Solenoid valve — EGR (vent / vacuum)
Cranking (cold engine)OFF
Warming up (during idle)OFF
Medium load — ColdOFF
Medium load — WarmON
AccelerationON
Heavy loadOFF
DecelerationOFF
IdleOFF
IG: ON (engine not running)OFF
RemarkSystem operates: Amount of EGR changes
Solenoid valve — PRC
Cranking (cold engine)OFF (Vacuum to pressure regulator)
Warming up (during idle)OFF (Vacuum to pressure regulator)
Medium load — ColdOFF (Vacuum to pressure regulator)
Medium load — WarmOFF (Vacuum to pressure regulator)
AccelerationOFF (Vacuum to pressure regulator)
Heavy loadOFF (Vacuum to pressure regulator)
DecelerationOFF (Vacuum to pressure regulator)
IdleON*
IG: ON (engine not running)OFF
Remark* During hot start only
Solenoid valve — VRIS No. 1
Cranking (cold engine)OFF
Warming up (during idle)OFF
Medium load — ColdOFF
Medium load — WarmOFF
AccelerationON*
Heavy loadON*
DecelerationON*
IdleON*
IG: ON (engine not running)OFF
Remark* Engine speed: 1,900–2,600 rpm 3,900–6,300 rpm
Solenoid valve — VRIS No. 2
Cranking (cold engine)OFF
Warming up (during idle)OFF
Medium load — ColdOFF
Medium load — WarmOFF
AccelerationON*
Heavy loadON*
DecelerationON*
IdleON*
IG: ON (engine not running)OFF
Remark* Engine speed: 1,900–2,600 rpm 4,700–6,300 rpm
BAC valve — Idle air control valve
Cranking (cold engine)ON (Closed loop duty)
Warming up (during idle)ON (Closed loop duty)
Medium load — ColdON (Fixed duty)
Medium load — WarmON (Fixed duty)
AccelerationON (Fixed duty)
Heavy loadON (Fixed duty)
DecelerationON (Closed loop duty)
IdleON (Closed loop duty)
IG: ON (engine not running)OFF
Remark—
BAC valve — Air valve
Cranking (cold engine)OPEN
Warming up (during idle)OPEN
Medium load — ColdCLOSED
Medium load — WarmCLOSED
AccelerationCLOSED
Heavy loadCLOSED
DecelerationCLOSED
IdleCLOSED
IG: ON (engine not running)—
Remark—
A/C relay
Cranking (cold engine)OFF (A/C cut)
Warming up (during idle)ON
Medium load — ColdON
Medium load — WarmON
AccelerationOFF (A/C cut)
Heavy loadOFF (A/C cut)
DecelerationON
IdleON
IG: ON (engine not running)OFF
RemarkA/C operating