Mitsubishi Space Star. Manual — part 47
GDI –
Troubleshooting
13A-115
Terminal
No.
Normal condition
Check condition (Engine condition)
Check item
83
A/C switch 1
Engine: Idling
A/C switch: OFF
0 – 3 V
A/C switch: ON (Compres-
sor is operating)
System voltage
86
Small lamp switch
Lighting switch: OFF
0 – 3 V
Lighting switch: Tail light position
System voltage
87
Sensor applied voltage
Ignition switch: ON
4.5 – 5.5 V
93
Fuel pressure sensor
Engine: Idling
0.3 – 4.7 V
95
Accelerator pedal posi-
tion sensor (1st chan-
nel)
Ignition switch: ON
Release the accelerator
pedal.
0.985 – 1.085 V
nel)
Depress the accelerator
pedal fully.
4.0 V or higher
96
Brake vacuum sensor
Engine: Stop the engine from idle speed, turn the
ignition switch ON, and then depress the brake
pedal several times.
Voltage increases
98
Ignition switch-IG
Ignition switch: ON
System voltage
123
Stop lamp switch
Depress the brake pedal.
System voltage
Release the brake pedal.
0 – 3 V
CHECK CHART FOR RESISTANCE AND CONTINUITY
BETWEEN TERMINALS
1.
Turn the ignition switch to OFF.
2.
Disconnect the engine-A/T-ECU connector.
3.
Measure the resistance and check for continuity between
the terminals of the engine-A/T-ECU harness-side
connector while referring to the check chart.
NOTE
(1) When measuring resistance and checking continuity,
a harness for checking contact pin pressure should
be used instead of inserting a test probe.
(2) Checking need not be carried out in the order given
in the chart.
Caution
If the terminals that should be checked are mistaken,
or if connector terminals are not correctly shorted
to earth, damage may be caused to the vehicle wiring,
sensors, engine-A/T-ECU and/or ohmmeter.
Be careful to prevent this!
4.
If the ohmmeter shows any deviation from the standard
value, check the corresponding sensor, actuator and
related electrical wiring, and then repair or replace.
5.
After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corrected
the problem.
GDI –
Troubleshooting
13A-116
Engine-A/T-ECU Harness Side Connector Terminal Arrangement
Terminal No.
Check item
Standard value, normal condition (check conditions)
3 – 41
Oxygen sensor heater (front)
4.5 – 8.0
Ω
(at 20
C)
26 – 41
Oxygen sensor heater (rear)
11 – 18
Ω
(at 20
C)
34 – 41
Purge control solenoid valve
28 – 36
Ω
(at 20
C)
Between terminal
42 and body earth
Earth
Continuity (0
Ω
)
Between terminal
48 and body earth
51 – 41
EGR valve (A)
15 – 20
Ω
(at 20
C)
53 – 41
EGR valve (C)
60 – 41
EGR valve (B)
62 – 41
EGR valve (D)
44 – 81
Engine coolant temperature sensor
5.1 – 6.5 k
Ω
(When coolant temperature is 0
C)
2.1 – 2.7 k
Ω
(When coolant temperature is 20
C)
0.9 – 1.3 k
Ω
(When coolant temperature is 40
C)
0.26 – 0.36 k
Ω
(When coolant temperature is 80
C)
64 – 81
Intake air temperature sensor
5.3 – 6.7 k
Ω
(When intake air temperature is 0
C)
2.3 – 3.0 k
Ω
(When intake air temperature is 20
C)
1.0 – 1.5 k
Ω
(When intake air temperature is 40
C)
0.30 – 0.42 k
Ω
(When intake air temperature is 80
C)
79 – 81
Accelerator pedal position switch
Continuity (when the accelerator pedal is released)
No continuity (when the accelerator pedal is
depressed slightly)
GDI –
Troubleshooting
13A-117
CHECK AT THE THROTTLE VALVE CONTROLLER TERMINALS
TERMINAL VOLTAGE CHECK CHART
Throttle Valve Controller Terminal Arrangement
Terminal
No.
Check items
Requirements
Normal value
1
Throttle valve control servo
(A+)
Ignition switch: ON
Accelerator pedal: Fully opened
→
fully closed
Decreases slightly from
system voltage.
9
Throttle valve control servo
(B+)
fully closed
14
Throttle valve control servo
(A–)
Ignition switch: ON
Accelerator pedal: Fully closed
→
fully opened
Decreases slightly (approx.
2 V) from system voltage.
15
Throttle valve control servo
(B–)
fully opened
2
Power supply to throttle
valve control servo
Ignition switch: ON
System voltage
19
valve control servo
5
Power supply
Ignition switch: ON
System voltage
6
Sensor voltage
Ignition switch: ON
4.5 – 5.5 V
7
Throttle position sensor (1st
channel)
Ignition switch:
ON
Release the
accelerator pedal.
0.45 – 0.8 V
Depress the
accelerator pedal
fully.
4.2 – 4.9 V
20
Accelerator pedal position
sensor (2nd channel)
Ignition switch:
ON
Release the
accelerator pedal.
0.985 – 1.085 V*
1
Depress the
accelerator pedal
fully.
4 V or more*
1
NOTE:
Check that the voltage difference between *
1
and *
2
is 4 V or more.
GDI –
Troubleshooting
13A-118
INSPECTION PROCEDURE USING AN ANALYZER
AIR FLOW SENSOR (AFS)
The followings have been changed from the previous
description.
Alternate Method (Test harness not available)
<Vehicles with M/T>
Connect the analyzer special patterns pickup to engine-ECU
terminal 61.
<Vehicles with A/T>
Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 65.
CAMSHAFT POSITION SENSOR AND CRANK ANGLE
SENSOR
The measurement method has been changed from the previous
description.
Measurement Method
1.
Disconnect the camshaft position sensor connector and
connect the special tool (test harness: MB991709) in
between. (All terminals should be connected.)
2.
Connect the analyzer special patterns pickup to camshaft
position sensor terminal 2.
3.
Disconnect the crank angle sensor connector and connect
the special tool (test harness: MD998478) in between.
4.
Connect the analyzer special patterns pickup to crank
angle sensor terminal 2.
Alternate Method (Test harness not available)
<Vehicles with M/T>
1.
Connect the analyzer special patterns pickup to
engine-ECU terminal 50. (When checking the camshaft
position sensor signal wave pattern.)
2.
Connect the analyzer special patterns pickup to
engine-ECU terminal 43. (When checking the crank angle
sensor signal wave pattern.)
<Vehicles with A/T>
1.
Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 56. (When checking the
camshaft position sensor signal wave pattern.)
2.
Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 45. (When checking the crank
angle sensor signal wave pattern.)
Crank
angle
sensor connector
Camshaft position sensor connector
Analyzer
Special patterns
pick-up
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