Mitsubishi Galant. Manual — part 366

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-34

DTC 17: Throttle Position Sensor System

AC004586AB

Throttle Position Sensor System Circuit

AC004587AB

CONNECTOR: B-05<2.4L>

BATTERY

AC004588

CONNECTOR: B-05<3.0L>

BATTERY

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-35

CIRCUIT OPERATION
The throttle position sensor signal is sent to the auto-
cruise control-ECU through this circuit.
The auto-cruise control-ECU receives a signal from
the throttle position sensor at terminal 3.
The signal is OFF when the accelerator pedal is
depressed, and ON when the accelerator pedal is
released.
The throttle position sensor sends a voltage signal to
terminal 1 of the auto-cruise control-ECU.
The voltage depends on throttle opening angle.

DTC SET CONDITIONS
If 2.5 volts or more 0.2 volts or less is output for four
seconds or more.

TROUBLESHOOTING HINTS
The most likely causes for this code to be set are:

•

Malfunction of the throttle position sensor.

•

Damaged harness or connector.

•

Malfunction of the auto-cruise control-ECU.

DIAGNOSIS

Required Special Tools:

•

MB991502: Scan Tool (MUT-II)

•

MB991223: Harness Set

STEP 1. Check the throttle position sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK"(OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Using scan tool MB991502.
(2) Connect scan tool MB991502 to the data link connector.
(3) Turn the ignition switch to "ON" position.
(4) Read the MFI-DTC.
(5) Turn the ignition switch to "LOCK"(OFF) position.

Q: Is the MFI-DTC P0120 is output?

YES : For 2.4L Engine, refer to GROUP 13A, Diagnosis

−

Diagnostic Trouble Code Chart

P.13A-20

For 3.0L Engine, refer to GROUP 13B, Diagnosis

−

Diagnostic Trouble Code Chart

P.13B-19

NO : Go to Step 2.

AC004589

CONNECTOR: C-17

AC004572AB

CONNECTOR: C-52

AC004569

MB991502

16 PIN

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 2. Check the output circuit voltage at auto-cruise
control-ECU connector C-52 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-52.
(2) Turn the ignition switch to "ON" position and the auto-cruise

control main switch to "ON" position.

(3) Measure the voltage between terminal 1 and ground by

backprobing.

•

Voltage should be between 4.0 and 5.5 volts.
(When accelerator pedal is fully depressed.)]

•

Voltage should be between 0.4 and 1.0 volts.
(When accelerator pedal is released.)

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Are the voltage within specifications?

YES : Check that diagnostic trouble code 17 is not output.

If diagnostic trouble code 17 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-74

Then check that diagnostic trouble code 17 is not.

NO : Go to Step 3.

STEP 3. Check auto-cruise control-ECU connector C-52.
Q: Is the connector damaged?

YES : Repair or replace connector.

Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

Then check that diagnostic trouble code 17 is not
output.

NO : Go to Step 4.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01901

C-52 CONNECTOR
HARNESS SIDE VIEW

AC004572AB

CONNECTOR: C-52

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 4. Check the harness wire between throttle position
sensor connector B-05 and auto-cruise control-ECU
connector C-52.
Q: Is the harness wire between throttle position sensor

connector B-05 and auto-cruise control-ECU connector
C-52 damaged?
YES : Repair harness wire and then check that diagnostic

trouble code 17 is not output.

NO : Check that diagnostic trouble code 17 is not output.

If diagnostic trouble code 17 is output, replace the
auto-cruise control-ECU. (Refer to

P.17-74

Then check that diagnostic trouble code 17 is not
output.

SYMPTOM CHART

M1172002300087

AC004587AB

CONNECTOR: B-05<2.4L>

BATTERY

AC004588