Mitsubishi Montero (2002-2004). Manual — part 597

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-85

STEP 6. Using scan tool MB991502, check data list item 79:
Throttle Position Sensor (main).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting 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) Detach the intake air hose at the throttle body.
(4) Disconnect the connector of the throttle position sensor.
(5) Use test harness special tool (MB991348) to connect only

terminals No. 1, No. 2, No. 3, and No. 4.

(6) Set scan tool MB991502 to the data reading mode for

item 79, Throttle Position Sensor (main).

• Output voltage should be between 0.2 and 0.8 volts

when the throttle valve is fully closed with your finger.

• Output voltage should be between 3.8 and 4.9 volts

when the throttle valve is fully open with your finger.

(7) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points

P.00-6

.

NO : Replace the PCM. Then go to Step 12.

STEP 7. Check the throttle position sensor.
(1) Disconnect the connector B-05.

(2) Measure the resistance between throttle position sensor

side connector terminal No. 2 and No. 4.

Standard value: 2

− 4 kiloohms

Q: Is the measured resistance between 2 and 4 kiloohms?

YES : Go to Step 8.
NO : Replace the throttle body ASSY. Then go to Step 12.

ACX01539

16-PIN

MB991502

AC

AK201174

1

6 5 4 3 2

B-05(B)

CONNECTOR: B-05

HARNESS
CONNECTOR:
COMPONENT SIDE

AB

6

1 2 3 4 5

AK201512

THROTTLE POSITION
SENSOR SIDE
CONNECTOR

AB

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-86

STEP 8. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

STEP 9. Check for harness damage between throttle
position sensor connector B-05 (terminal No. 2) and PCM
connector D-135 (terminal No. 106).
Q: Is the harness wire in good condition?

YES : Go to Step 10.
NO : Repair it. Then go to Step 12.

AK200947

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

CONNECTOR: D-135

HARNESS CONNECTOR:
COMPONENT SIDE

AB

PCM

D-135(GR)

AK201174

1

6 5 4 3 2

B-05(B)

CONNECTOR: B-05

HARNESS
CONNECTOR:
COMPONENT SIDE

AB

AK200947

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

CONNECTOR: D-135

HARNESS CONNECTOR:
COMPONENT SIDE

AB

PCM

D-135(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-87

STEP 10. Check for open circuit, short circuit to ground
and harness damage between throttle position sensor
connector B-05 (terminal No. 1) and PCM connector D-135
(terminal No. 115).
Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO : Repair it. Then go to Step 12.

AK201174

1

6 5 4 3 2

B-05(B)

CONNECTOR: B-05

HARNESS
CONNECTOR:
COMPONENT SIDE

AB

AK200947

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

CONNECTOR: D-135

HARNESS CONNECTOR:
COMPONENT SIDE

AB

PCM

D-135(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-88

STEP 11. Using scan tool MB991502, check data list item
79: Throttle Position Sensor (main).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting 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) Detach the intake air hose at the throttle body.
(4) Disconnect the connector of the throttle position sensor.
(5) Use test harness special tool (MB991348) to connect only

terminals No. 1, No. 2, No. 3, and No. 4.

(6) Set scan tool MB991502 to the data reading mode for item

79, Throttle Position Sensor (main).

• Output voltage should be between 0.2 and 0.8 volts

when the throttle valve is fully closed with your finger.

• Output voltage should be between 3.8 and 4.9 volts

when the throttle valve is fully open with your finger.

(7) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points

P.00-6

.

NO : Replace the PCM. Then go to Step 12.

STEP 12. Using scan tool MB991502, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P0122 set?

YES : Retry the troubleshooting.
NO : The inspection is complete.

ACX01539

16-PIN

MB991502

AC

ACX01539

16-PIN

MB991502

AC