1989-Mitsu-Factory Manual · mpi system · страница 25 из 48 · Открыть оригинал PDF ↗
(6) After repair, check once again to be sure the problem has
been corrected.
(7) Switch OFF the ignition switch.
(8) Disconnect the multi-use tester.
(9) Disconnect the battery terminals for ten seconds or longer.
This erases the self-diagnosis code.
(10)Restat-t the engine. Check (by a driving test and other
means) to be sure that the problem has been corrected.
Checking the cranking (Check when the engine can’t be started or when it is started.)
| Chk i | Ch | eck description | Probable cause of malfunction (or | |
|---|---|---|---|---|
| ec tems | Check cond | itions | Norma) value | action) |
| Power-supply voltage l Data reading l Item No. 16 | l Ignition switch: O | N | ll-13v | l Low battery voltage l Power not supplied to the engine control unit (1)Check the power-supply circuit. (2)Check the ignition switch, ignition signal and input circuit. (3)Check the control relay. (4)Check the control relay control circuit. l Malfunction of the engine control unit earth circuit. |
| Throttle position sensor D Data reading B Item No. 14 | l Ignition switch: O l Throttlevalve: idl (When the Throttle sensor output vol mV or lower, the unit diagnoses th signal.) | N ing position position tage is 1200 engine control e injector | 300-1000 mV | l Maladjustment of the throttle position sensor l Malfunction of the throttle posi- tion sensor or related circuitry |
| Self-diagnosis output | l Crank the engine seconds or longer l Ignition switch: O (Check for injector top dead center sensor circ disconnection or | for four . N or uitry damage.) | Normal | l Check in accordance with the diagnosis code. [Note that the diagnosis code will be erased if there is disconnection or damage of the engine control unit back-up power-supply circuit.) l If various diagnosis codes are output, the most frequent cause is damage or disconnection of the power-supply or earth circuit. |
| %el pump D Actuater test m item No. 7 | l Make the test with relation to both engine cranking and fuel | Pinch closed the return hose. | The pulsations of fuel flow can be felt by the finger. | l Power is not supplied to the fuel pump. (1)Check the ignition switch (IG and ST). |
| pump forced actuation. | Listen close to the fuel tank. | The pump operation sound can be heard. | (2)Check the control relay. (3)Check related circuitry. l Fuel pump malfunction | |
| gnition switch - ST @ Data reading B Item No. 18 | l Ignition switch: ON | Engine stopped Cranking | OFF ON | l Ignition switch -ST signal circuit check l Ignition switch check |
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