Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 115

13D-50
INSPECTION PROCEDURE 27
Power supply system and ignition switch-IG system
When an ignition switch ON signal is input to the engine-ECU <M/T> or engine-A/T-ECU
<A/T>, the engine-ECU <M/T> or engine-A/T-ECU <A/T> turns the control relay ON.
This causes battery voltage to be supplied to the engine-ECU <M/T> or engine-A/T-ECU
<A/T>, injectors and air flow sensor.
Check the control relay. (Refer to P.13D-86.)
Measure at the control relay connector A-14X.
D Disconnect the connector, and measure at the harness side.
D Voltage between 3, 4 and earth
OK: System voltage
Check the engine-ECU power supply and earth circuit.
(Refer to P.13D-49, INSPECTION PROCEDURE 26.)
MPI -
OK
OK
Troubleshooting
Probable cause
D Malfunction of the ignition switch
D Malfunction of the control relay
D Improper
short-circuited harness wire
D Disconnected engine-ECU<M/T> or engine-A/T-ECU
<A/T> earth wire
D Malfunction
engine-A/T-ECU <A/T>
NG
Replace
NG
Check the following
connector: A-28
OK
Check trouble symptom.
NG
Check the harness wire between battery and control relay connector,
and repair if necessary.
connector contact, open circuit
of the engine-ECU <M/T>
NG
Repair
or
or