Mitsubishi Space Star. Manual — part 32

GDI –

Troubleshooting

13A-55

Code No. P0443 Purge control solenoid valve system

Probable cause

Range of Check

Ignition switch: ON

Battery voltage is 10 V or more.

Set Conditions

The solenoid coil surge voltage (battery voltage + 2 V) is not detected
when the purge control solenoid valve is turned from on to off.

Malfunction of the purge control solenoid valve

Open or short circuit in the purge control solenoid
valve circuit or loose connector contact

Malfunction of engine-ECU <M/T>

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

NG

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

OK

Check the trouble symptoms.

OK

NG

Repair

Check the harness wires between
the purge control solenoid valve and
the engine control relay, and
between the purge control solenoid
valve and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

OK

Check the following connector:
B-84

NG

Repair

NG

Check the harness wire between
the purge control solenoid valve and
the engine control relay, and repair
if necessary.

NG

Check the following connector:
B-26

NG

Repair

OK

Measure at the purge control
solenoid valve connector A-58.

Disconnect the connector and
measure at the harness side.

Ignition switch: ON

The voltage between terminal 2
and earth
OK: System voltage

OK

Check the following connector:
A-58

NG

Repair

NG

Measure at the purge control
solenoid valve connector A-58.

Disconnect the connector, and
measure at the solenoid valve
side.

The resistance between
terminals 1 and 2
OK: 28 – 36

Ω

(at 20

C)

NG

Replace

Repair

MUT-

II

Actuator Test

08 Purge control solenoid valve

OK: Operating sound can be

heard and the valve vibrates.

OK

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

OK

OK

Measure at engine-ECU connector
B-84 <M/T> or engine-A/T-ECU
connector B-84 <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 16
<M/T>, 34 <A/T> and earth
OK: System voltage

NG

Check the following connector:
B-84

NG

Repair

OK

NG

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

Check the harness wire between
the purge control solenoid valve and
the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.

GDI –

Troubleshooting

13A-56

Code No. P0500 Vehicle speed sensor system

Probable cause

Range of Check

Engine: Two seconds after the engine was started

Idle switch: OFF

Engine speed: 2,500 r/min or more

During high engine load

Set Conditions

The sensor output voltage does not change for 4 seconds (no pulse signal
input).

Malfunction of the vehicle speed sensor

Open or short circuit in the vehicle speed sensor
circuit or loose connector contact

Malfunction of engine-ECU <M/T>

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

NO

Check the vehicle speed sensor
(Refer to GROUP 54 – Combination Meter.)

YES

Use an analyzer to measure the output waveform of the
vehicle speed sensor at engine-ECU connector B-87 <M/T>
or engine-A/T-ECU connector B-86 <A/T>.

Driving the vehicle

The voltage between terminal 80 and earth
OK: A normal waveform should be displayed as de-

scribed in OSCILLOSCOPE INSPECTION PROCE-
DURE, and noise should not be displayed in the
waveform. (Refer to GROUP 23 – Troubleshooting.)

NG

NG

Repair

OK

Check the harness wire between intermediate connector B-19
and the engine-ECU <M/T> or engine-A/T-ECU <A/T>, and
repair if necessary.

OK

Check the following connector: A-71

NG

Repair

OK

Check the trouble symptoms.

NG

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

Does the speedometer operate normally?

Check the following connectors:
B-87 <M/T>, B-86 <A/T>, B-19

Code No. P1200 Injector driver system

Probable cause

Range of Check

Engine speed: 4,000 r/m or less

Battery voltage: 10 V or more

The fuel cut operation and the injector operation (by carrying out the
Actuator test) are not in progress.

During high engine load

Set Conditions

Injector open circuit check signal is not output from the injector driver.

Malfunction of the injector driver

Open or short circuit, or loose connector contact

Malfunction of engine-ECU <M/T>

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

OK

Use an analyzer to measure the signal waveform at
engine-ECU connectors B-84, B-87 <M/T> or engine-A/T-ECU
connectors B-84, B-85 <A/T>.

Engine: Idling

The voltage between terminal 96 <M/T>, 63 <A/T> and
earth, terminal 1 and earth
OK: A normal waveform should be displayed as de-

scribed on P.13A-118 (INSPECTION PROCEDURE
USING AN ANALYZER).

NG

Replace the injector driver.

OK

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

NG

Repair

NG

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

Check the following connector: B-87 <M/T>, B-85 <A/T>

NG

Repair

OK

Check the trouble symptoms.

OK

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

GDI –

Troubleshooting

13A-57

Code No. P1220 Electronic-controlled throttle valve
system

Probable cause

Range of Check

Ignition switch: ON

Error in communication between the engine-ECU <M/T> or engine-A/T-ECU
<A/T> and the throttle valve controller

Set Conditions

Output voltage of throttle position sensor (2nd channel) fluctuates
significantly (approx. 1 V or more) from an expected value, based on that
of the accelerator pedal position sensor (2nd channel).

Range of Check

Ignition switch: ON

Error in communication between the throttle valve controller and the
engine-ECU <M/T> or engine-A/T-ECU <A/T>

Set Conditions

The output voltage of the throttle position sensor (2nd channel) is
significantly different (approx. 1 V) from the throttle valve opening angle
(voltage), which the engine-ECU <M/T> or engine-A/T-ECU <A/T> request
the throttle valve controller.

Short in communication line

Malfunction of the engine-ECU <M/T>

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

Malfunction of the throttle valve controller

NG

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

Check the trouble symptoms.

NG

Replace the throttle valve controller.

OK

Check the trouble symptoms.

OK

Check the harness wire between the throttle valve controller
and the engine-ECU <M/T> or engine-A/T-ECU <A/T>.

NG

Repair

Check the following connectors:
B-87 <M/T>, B-84 <A/T>, B-15

NG

Repair

GDI –

Troubleshooting

13A-58

Code No. P1221 Throttle valve position feedback system

Probable cause

The throttle valve controller judges a malfunction, and then transmit the result
to the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
Range of Check

Ignition switch: ON

Battery voltage: 10 V or more

Set Conditions

Failure in the motor position feedback
(The engine-ECU <M/T> or engine-A/T-ECU <A/T> detects that the current
in the motor is excessive and the opening angle difference between the
target value of throttle position sensor (1st channel) and the actual value of
throttle position sensor (1st channel) is 1.0 V or more)

Malfunction of throttle position sensor (1st
channel)

Open or short circuit in the throttle position
sensor (1st channel) circuit or loose connector
contact

Malfunction of the throttle valve controller

NO

MUT-

II

Self-Diag Code

Is Code No. P1224 set?

YES

Refer to Code No. P1224, Throttle valve control servo motor
(motor 1st phase malfunction) system (Refer to P.13A-60.)

NG

Replace the throttle valve controller.

OK

Check the trouble symptoms.

NG

Check the harness wires between the throttle position sensor
and the throttle valve controller, and between the throttle
valve control servo and the throttle valve controller.

NG

Repair

NO

Adjust the throttle position sensor. (Refer to P.13A-96*.)

MUT-

II

Self-Diag Code

Is code No. P0120 set?

YES

Refer to Code No. P0120, Throttle position sensor (1st
channel) system (Refer to P.13A-22.)

OK

Check the following connectors: A-66, A-68, B-15

NG

Repair

OK

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

NG

Replace the throttle body assembly.

NO

MUT-

II

Self-Diag Code

Is Code No. P1228 set?

YES

Refer to Code No. P1228, Throttle valve control servo motor
(motor 2nd phase malfunction) system (Refer to P.13A-63.)

NOTE
*:

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