Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 534

Engine-ECU Connector Terminal Arrangement
Terminal No. Check item
1 No. 1 injector
14 No. 2 injector
2 No. 3 injector
15 No. 4 injector
4 Stepper motor coil
<A1>
17 Stepper motor coil
<A2>
5 Stepper motor coil
<B1>
18 Stepper motor coil
<B2>
6 EGR control solenoid
valve valve
8 A/C relay
9 Purge control sole-
noid valve noid valve
10 Power transistor unit
12 Power supply
25
MPI –
Troubleshooting
CHECK AT THE ENGINE-ECU TERMINALS
TERMINAL VOLTAGE CHECK CHART
Check condition (Engine condition)
While engine is idling after having warmed up,
suddenly depress the accelerator pedal. suddenly depress the accelerator pedal
Engine: Soon after the warmed up engine is
started
Ignition switch: ON
While engine is idling, suddenly depress the
accelerator pedal.
Engine: Idle speed
A/C switch: OFF ON (A/C compressor
runs)
Ignition switch: ON
Running at 3,000r/min while engine is warming
up after having been started.
Engine r/min: 3,000 r/min
Ignition switch: ON
13B-53
13100920506
Normal
condition
From 11 – 14 V, momentarily
drops slightly drops slightly
System voltage 0 V
(Changes repeatedly)
System Voltage
From system voltage,
momentarily drops
System voltage or momen-
tarily 6 V or more 0 – 3 V
System voltage
0 – 3 V
0.3 – 3.0 V
System voltage