Mitsubishi Montero Sport (2004+). Manual — part 112

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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DTC 17: Throttle Position Sensor, Idle Position Signal System

Throttle Position Sensor, Idle Position Signal System Circuit

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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.

CIRCUIT OPERATION
The throttle position sensor signal and idle position
signal are sent to the auto-cruise control-ECU
through this circuit.
The throttle position sensor sends a voltage signal to
terminal 1 of the auto-cruise control-ECU. The volt-
age depends on throttle opening angle.
The auto-cruise control-ECU receives an idle posi-
tion signal from the PCM at terminal 2. The signal is
OFF when the accelerator pedal is depressed, and
ON when the accelerator pedal is released.

.

DTC SET CONDITIONS

• The Idle position signal is ON and the throttle

position sensor voltage is 2.5 volts or more for
four seconds or more.

• The Idle position signal is OFF and the throttle

position sensor voltage is 0.2 volts or less 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

• Malfunction of the PCM

AC004761 AC

CONNECTOR: A-41

A-41(B)

AC004747 AE

CONNECTOR: C-35

C-35 (B)

AC103440AH

C-71

CONNECTORS: C-41, C-71

C-41

PCM

C-90 (GR) C-91 (GR)

AC203152 AB

CONNECTORS: C-90, C-91

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (MUT-III sub assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB cable

• MB991911: MUT-III main harness B

• MB991223: Harness set

STEP 1. Check the throttle position sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the MFI-DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are the MFI-DTC P0121, P122 or P123 set?

YES : Refer to GROUP 13A, Diagnosis

− Diagnostic

Trouble Code Chart

P.13A-26

.

NO : Go to Step 2 .

AK303629AB

MB991911

MB991827

MB991824

16-PIN

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 2. Measure the output circuit voltage at auto-cruise
control-ECU connector C-35 by backprobing.
(1) Do not disconnect auto-cruise control-ECU connector C-35.
(2) Turn the ignition switch to the "ON" position and the

auto-cruise control main switch to the "ON" position.

(3) Measure the voltage between auto-cruise control-ECU

connector C-35 terminal 1 and ground by backprobing.

• Voltage should measure between 4.0 and 5.5 volts.

(When accelerator pedal is fully depressed).]

• Voltage should measure between 0.4 and 1.0 volts.

(When accelerator pedal is released).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are all of the measured voltage satisfied?

YES : Go to Step 5 .
NO : Go to Step 3 .

STEP 3. Check auto-cruise control-ECU connector C-35 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is the connector damaged?

YES : Repair or replace the damaged components. (Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

). Then Go to Step 10 .

NO : Go to Step 4 .

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE
CONNECTOR

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

ACX01901 AI

C-35 HARNESS CONNECTOR:
HARNESS SIDE

AC202155

2

3

10

11

5

6

13

14

12

4

8

16 15

7

9

1

C-35 (B)

AB

CONNECTOR: C-35

C-35 HARNESS SIDE
CONNECTOR