Mitsubishi Galant. Manual — part 393

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC 11: Throttle Position Sensor System (Short Circuit)

CIRCUIT OPERATION

•

When the throttle valve shaft rotates from the idle
position to the fully opened position, the
resistance between the TPS output terminal
(terminal 3) and ground terminal (terminal 1) will
increase according to the rotation.

•

Voltage at pin 78 increases from around 0.7 volts
at closed throttle to about 5 volts at wide open
throttle.

DTC SET CONDITIONS
If the PCM output voltage is 4.8 volts or higher when
the engine is idling, the output is judged to be too
high and diagnostic trouble code number "11" is
output.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set:)

•

Malfunction of the throttle position sensor circuit

•

Damaged harness, connector

•

Malfunction of the PCM

AC004610

Throttle Position Sensor System Circuit

AB

AC001831AD

CONNECTOR: B-05

<2.4L ENGINE>

<3.0L ENGINE>

AC004197

PCM

C-40

C-41

CONNECTORS: C-40, C-41

AB

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DIAGNOSIS

Required Special Tool:
MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 11:
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) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Set scan tool MB991502 to data reading mode for item 11:

Throttle Position Sensor.

•

With the throttle valve in idle position, voltage should be
between 535 and 735 mV.

•

With the throttle valve in full-open position, voltage
should be between 4,500 and 5,500 mV.

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

Q: Is the sensor operating properly?

YES : This malfunction is intermittent. Refer to GROUP 00,

How to Use Troubleshooting/Inspection Service
Points

−

How to Cope with Intermittent Malfunction

P.00-8

.

NO : Go to Step 2.

STEP 2. Check the sensor output voltage at throttle
position sensor connector B-05 by backprobing.
(1) Do not disconnect connector B-05.
(2) Turn the ignition switch to "ON" position.

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

backprobing.

•

With the throttle valve in idle position, voltage should be
between 0.535 and 0.735 volts.

•

With the throttle valve in full-open position, voltage
should be between 4.5 and 5.5 volts.

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

Q: Is the voltage normal?

YES : Go to Step 3.
NO : Go to Step 7.

AC003081AC

MB991502

DATA LINK
CONNECTOR

AC001831AD

CONNECTOR: B-05

<2.4L ENGINE>

<3.0L ENGINE>

AC001548

B-05 CONNECTOR
HARNESS SIDE VIEW

AD

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STEP 3. Check the sensor output voltage at PCM
connector C-41 by backprobing.
(1) Do not disconnect connector C-41.
(2) Turn the ignition switch to "ON" position.

(3) Measure the voltage between terminal 78 and ground by

backprobing.

•

With the throttle valve in idle position, voltage should be
between 0.535 and 0.735 volts.

•

With the throttle valve in full-open position, voltage
should be between 4.5 and 5.5 volts.

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

Q: Is the voltage normal?

YES : Go to Step 4.
NO : Go to Step 6.

STEP 4. Check connectors B-05 at throttle position sensor
and C-41 at the PCM for damage.
Q: Are the connectors in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

AC004197

PCM

AC

CONNECTOR: C-41

AC000847AE

C-41 CONNECTOR
HARNESS SIDE VIEW

AC001831AD

CONNECTOR: B-05

<2.4L ENGINE>

<3.0L ENGINE>

AC004197

PCM

AC

CONNECTOR: C-41

AUTOMATIC TRANSAXLE DIAGNOSIS

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STEP 5. Using scan tool MB991502, check data list item 11:
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) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item

11: Throttle Position Sensor.

•

With the throttle valve in the idle position, voltage should
be between 535 and 735 mV.

•

With the throttle valve in the full-open position, voltage
should be between 4,500 and 5,500 mV.

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

Q: Is the sensor operating properly?

YES : This malfunction is intermittent. Refer to GROUP 00,

How to Use Troubleshooting/Inspection Service
Points

−

How to Cope with Intermittent Malfunction

P.00-8

.

NO : Replace the PCM.

STEP 6. Check connectors B-05 at throttle position sensor
and C-41 at PCM for damage.
Q: Are the connectors in good condition?

YES : Repair it because of harness damage between

throttle position sensor connector B-05 terminal 3 and
PCM connector C-41 terminal 78.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

AC003081AC

MB991502

DATA LINK
CONNECTOR

AC001831AD

CONNECTOR: B-05

<2.4L ENGINE>

<3.0L ENGINE>

AC004197

PCM

AC

CONNECTOR: C-41