Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 87

13D-22
Code No. 44 Ignition coil system
Range of Check
D Engine speed is approx. 50 - 4,000 r/min
D Excluding deceleration driving and sudden acceleration or deceleration driving
Set conditions
D Misfire occurs in No.1 and No.4 cylinders or No.2 and No.3 cylinders more than
predeterminated times per 1,000 r/min.
Measure at the ignition coil connectors
A-97, A-98.
D Disconnect the connector, and
measure at the harnessside.
1. Voltage between 1 and earth
(Ignition switch: ON)
OK: System voltage
2. Voltage between 3 and earth
(Engine: Cranking)
OK: 0.5 - 4.0 V
3. Continuity between the 2 and earth
OK: Continuity
OK
Check the following connectors:
A-97, A-98
OK
Check trouble symptom.
NG
Check the following items.
D Check the spark plugs, spark plug
cables.
D Check the compression pressure.
OK
Replace the ignition coil.
Check trouble symptom.
NG
Replace the engine-ECU <M/T> or en-
gine-A/T-ECU <A/T>.
MPI -
Troubleshooting
1. NG
Check the following connectors:
B-13, B-89, B-103
Repair
2. NG
Check the following connector:
B-54 <M/T>, B-113 <A/T>
3. NG
Check trouble symptom.
Check the harness wire between the
engine-ECU <M/T> or engine-A/T-ECU
<A/T> and ignition coil connector.
Repair
Check the harness wire between the
ignition coil connector and earth, and
repair if necessary.
NG
Repair
NG
Repair or replace
Probable cause
D Malfunction of the ignition coil
D Improper connector
short-circuited harness wire of the ignition primary
circuit
D Malfunction of the spark plug and spark plug cable
D Improper compression pressure
D Malfunction
engine-A/T-ECU <A/T>
OK
NG
NG
OK
NG
OK
NG
contact, open circuit
of the engine-ECU <M/T>
Check trouble symptom.
NG
Check the harness wire between the
ignition coil and ignition switch connec-
tor, and repair if necessary.
Repair
Replace the engine-ECU <M/T> or en-
gine-A/T-ECU <A/T>.
or
or