Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 117

13D-52
INSPECTION PROCEDURE 29
Idle position switch system
The idle position switch inputs the condition of the accelerator pedal, i.e. whether
it is depressed or released (HIGH/LOW), 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> controls the idle speed control
servo based on this input.
Check the idle position switch. (Refer to P.13D-87.)
OK
Measure at the throttle position sensor connector A-73.
D Disconnect the connector, and measure at the harness side.
D Voltage between 3 and earth (Ignition switch: ON)
OK: 4 V or higher
D Continuity between 4 and earth
OK: Continuity
OK
NG
Check the following
connector: A-73
OK
Check trouble symptom.
NG
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
INSPECTION PROCEDURE 30
Ignition switch-ST system <M/T>
The ignition switch-ST inputs a HIGH signal to the engine-ECU while the engine is
cranking.
The engine-ECU controls fuel injection, etc. during starting based on this input.
Measure at the engine-ECU connector B-51.
D Disconnect the connector, and measure at the harness side.
1. Voltage between 71 and earth (Ignition switch: START)
OK: 8V or more
2. Continuity between 91 and earth
OK: Continuity
OK
NG
Check the following
connector: B-51
OK
Check trouble symptom.
NG
Replace the engine-ECU.
MPI -
Troubleshooting
NG
NG
Repair
1. NG
2. NG
Repair
Probable cause
D Maladjustment of the accelerator pedal
D Maladjustment of the fixed SAS
D Maladjustment of the idle position switch and throttle
position sensor
D Improper connector
short-circuited harness wire
D Malfunction of
engine-A/T-ECU <A/T>
Replace the throttle position sensor.
NG
Check the following
connector: B-51 <M/T>,
B-111 <A/T>
OK
Check trouble symptom.
NG
Check the harness wire between engine-ECU <M/T> or engine-A/
T-ECU <A/T> and throttle position sensor connector.
OK
Replace the engine-ECU
<M/T> or engine-A/
T-ECU <A/T>.
Probable cause
D Malfunction of ignition switch
D Improper connector
short-circuited harness wire
D Malfunction of the engine-ECU
NG
Check the following
connector: B-13
OK
Check trouble symptom.
NG
NG
Check harness wire be-
tween the engine-ECU
and ignition switch con-
nector.
OK
Check the ignition switch.
(Refer to GROUP 54 - Ignition Switch and Immobilizer system.)
Check the harness wire between engine-ECU connector (terminal
No. 91) and earth, and repair if necessary.
contact, open circuit
the engine-ECU <M/T>
Repair
NG
Repair
contact, open circuit
Repair
Repair
or
or
or