Mitsubishi Space Star. Manual - part 34

GDI  – 

Troubleshooting

13A-63

Code No. P1228 Throttle valve control servo motor
(Motor 2nd phase malfunction) system

Probable cause

Range of Check



Throttle valve control servo relay: ON



System voltage: 8 V or more

Set Conditions



Throttle valve control servo drive circuit is shorted to earth.



Other power source interferes with throttle valve control servo drive circuit.



Throttle valve control servo drive circuit is open-circuit.



Malfunction of the throttle valve control servo



Open circuit or short-circuited harness wire in
throttle valve control servo system, or poor
connector contact



Malfunction of the throttle valve controller

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the throttle valve controller.

Check the throttle valve control
servo (Refer to P.13A-109*).

NG

Replace the throttle body assembly.

OK

NG

Repair

OK

Measure at throttle valve controller
connector B-15.



Measure voltage at the throttle
valve controller connector
terminals.



Ignition switch: ON



The voltage between terminal 1,
9 and earth 

(Accelerator pedal:

 Fully open to

fully closed)
OK: The battery voltage tempo-

rarily shows a slight de-
crease.



The voltage between terminal
14, 15 and earth

(Accelerator pedal:

 Fully closed to

fully open)
OK: The battery voltage show a

slight (approximately 2 V)
decrease.

NG

Check the following connector: A-68

NG

Repair

OK

Check the harness wire between the
throttle valve control servo and the
throttle valve controller.

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the trouble symptoms.

Check the following connector:
B-15

NOTE
*:

Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)

GDI  – 

Troubleshooting

13A-64

Code No. P1500 Alternator FR terminal system

Probable cause

Range of Check



Engine speed: 50 r/min or more

Set Conditions



Input voltage from the alternator FR terminal is system voltage for 20
seconds.



Open circuit in alternator FR terminal circuit



Malfunction of engine-ECU <M/T>



Malfunction of engine-A/T-ECU <A/T>

OK

Check the trouble symptoms.

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)

NG

Replace the alternator.

OK

Check the trouble symptoms.

OK

Check the harness wire between
the intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the harness wire between
the intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

NG

Repair

OK

Check the harness wire between
the intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

NG

Repair

NG

Check the following connectors:
B-86 <M/T>, B-85 <A/T>

NG

Repair

Check the following connector:
A-75

NG

Repair

OK

Measure at intermediate connector
A-75.



Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.



Engine: Idling (After warming up)



Radiator fan: Not operating



The voltage between terminal 6
and earth
OK: The voltage drops when

the headlamps are turned
on. 

NG

Check the following connector:
A-93

NG

Repair

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Measure at intermediate connector
A-75.



Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.



Ignition switch: ON



The voltage between terminal 6
and earth
OK: 9  – 10 V

NG

Measure at engine-ECU connector
B-86 <M/T> or engine-A/T-ECU
connector B-85 <A/T>.



Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.



Ignition switch: ON



The voltage between terminal 52
<M/T>, 54 <A/T> and earth
OK: 9  – 10 V

NG

Check the following connectors:
B-86 <M/T>, B-85 <A/T>

OK

NG

Repair

OK

Check the following connectors:
B-86 <M/T>, B-85 <A/T>

NG

Replace

Check the harness wire between
the alternator and the intermediate
connector.

GDI  – 

Troubleshooting

13A-65

Code No. P1515 Brake vacuum sensor system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Sensor output voltage is 4.8 V or more.

or



Sensor output voltage is 0.2 V or less.



Malfunction of the brake vacuum sensor



Improper connector contact, open circuit or
short-circuited harness wire of the brake vacuum
sensor



Malfunction of the engine-ECU <M/T>



Malfunction of the engine-A/T-ECU <A/T>

To the next page.

OK

OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> .

NG

Repair

Check the following connectors:
B-87 <M/T>, B-86 <A/T>

NG

Repair

(2) NG

OK

Check the trouble symptoms.

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> .

NG

Repair

OK

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

NG

Repair

OK

Check the following connector:
B-86

NG

Repair

Check the following connector:
A-70

NG

Repair

OK

Measure at brake vacuum sensor
connector A-70



Disconnect the connector and
measure at the harness side.

(1) The voltage between terminal 3

and earth
(Ignition switch: ON)
OK: 4.8  – 5.2 V

(2) Continuity between terminal 2

and earth
OK: 2

Ω 

or less

(1) NG

Measure at engine-ECU connector
B-86 <M/T> or engine-A/T-ECU
connector B-86 <A/T>.



Measure the voltage at the
engine-ECU <M/T> or engine-
A/T-ECU <A/T> connector
terminals.



Ignition switch: ON



The voltage between terminal 41
<M/T>, 87 <A/T> and earth
OK: 4.8  – 5.2 V

NG

Check the following connector:
B-86

MUT-

II

 Data list

66 Brake vacuum sensor

OK: (Refer to P.13A-99, DATA

LIST REFERENCE TABLE.)

OK

Intermittent malfunction (Refer to
GROUP 00 – Points to Note for
intermittent Malfunctions.)

NG

GDI  – 

Troubleshooting

13A-66

NG

Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the trouble symptom.

OK

NG

Repair

NG

NG

Repair

OK

Check the trouble symptoms.

(2) NG

Replace the brake vacuum sensor

OK

Measure at engine-ECU connector
B-87 <M/T> or engine-A/T-ECU
connector B-86 <A/T>.



Measure the voltage at the
engine-A/T-ECU terminal.



Engine: Idling



The voltage between 74 and
earth  <M/T>
The voltage between 96 and
earth <A/T>
OK: 0.9  – 1.5 V

NG

Check the following connectors:
B-87 <M/T>, B-86 <A/T>

OK

(1) NG

Check the following connector:
B–86

NG

Repair

OK

Check the following connectors:
B-87 <M/T>, B-86 <A/T>

OK

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

From the previous page

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

(3) NG

OK

Check the harness wire between
the brake vacuum sensor and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>, and repair if
necessary.

Check the following connectors:
B–87 <M/T>, B–86 <A/T>

Repair

NG

Check the following connectors:
B–87 <M/T>, B–86 <A/T>

Measure at brake vacuum sensor
connector A

-

70.



Use test harness (MB991348) to
connect terminals, and measure
at the pick-up harness side.



Engine: Idling

(1) The voltage between 3 and earth

OK: 4.8  – 5.2 V

(2) The voltage between 1 and

earth
OK: 0.9  – 1.5 V

(3) The continuity between 2 and

earth
OK: 2 

Ω

 or less