Mitsubishi Montero (2002-2004). Manual — part 724

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-593

P2108 Throttle Actuator Control Module Processor Malfunction

.

TECHNICAL DESCRIPTION

• PCM checks the throttle actuator control module

processor for abnormal conditions.

.

DTC SET CONDITIONS

Check Conditions

• Ignition switch "ON" position.

Judgement Criteria

• No surveillance pulse signals are input for 0.5

seconds.

Check Conditions

• TPS (main) output voltage is higher than 0.35

volts and lower than 4.8 volts.

• APS (main) is normal.

• TPS is normal.

Judgement Criteria

• Difference between the TPS (main) output volt-

age and the target output voltage should be 1 volt
or higher for 10 seconds.

.

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

• PCM failed.

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, read the diagnostic
trouble code (DTC).

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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2108 set?

YES : Replace the PCM.
NO : It can be assumed that this malfunction is intermittent.

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

P.00-6

.

ACX01539

16-PIN

MB991502

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-594

P2121 Accelerator Pedal Position Sensor (Main) Circuit Range/Performance Problem

.

Accelerator Pedal Position Sensor (main) Circuit
Range/Performance Problem Circuit

• Refer to, DTC P2122 − Accelerator Pedal Posi-

tion Sensor (main) Circuit

P.13Ac-600

.

• Refer to GROUP 13A, INSPECTION PROCE-

DURE 33

− Accelerator Pedal Position Switch

Circuit

P.13Ad-110

.

.

CIRCUIT OPERATION

• Refer to, DTC P2122 − Accelerator Pedal Posi-

tion Sensor (main) Circuit

P.13Ac-600

.

• Refer to GROUP 13A, INSPECTION PROCE-

DURE 33

− Accelerator Pedal Position Switch

Circuit

P.13Ad-110

.

.

TECHNICAL DESCRIPTION

• PCM checks the APS (main) output signal char-

acteristics for abnormal conditions.

.

DTC SET CONDITIONS

Check Conditions

• Ignition switch "ON" position.

• Accelerator pedal position switch: ON

• APS (sub) output voltage or 1.88 volts or less.

Judgement Criteria

• APS (main) output voltage is 1.88 volts or higher

for 1 second.

.

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

• APS failed or maladjusted.

• Open or shorted APS (main) circuit, or loose con-

nector.

• Accelerator pedal position switch failed or malad-

justed.

• Open or shorted accelerator pedal position switch

circuit, or loose connector.

• PCM failed.

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Check connector D-138 at accelerator pedal
position sensor and accelerator pedal position switch for
damage.
Q: Is the connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 11.

AK200945

3

4

5

1

2

8

6

7

AB

CONNECTOR: D-138

HARNESS
CONNECTOR:
COMPONENT SIDE

D-138(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-595

STEP 2. Check the accelerator pedal position sensor.
(1) Disconnect the accelerator pedal position sensor connector

D-138.

(2) Measure resistance between terminal No. 1 and No. 2 and

between terminal No. 7 and No. 8.

Standard value: 3.5

− 6.5 kiloohms

(3) Measure resistance between terminal No. 2 and No. 3 and

between terminal No. 6 and No. 8.

(4) Move the accelerator pedal from the idle position to the full-

open position.

• Resistance value changes in accordance with the accel-

erator pedal depression smoothly.

Q: Is the resistance normal?

YES : Go to Step 3.
NO : Replace the accelerator pedal position sensor. Then

go to Step 11.

AK200945

3

4

5

1

2

8

6

7

AB

CONNECTOR: D-138

HARNESS
CONNECTOR:
COMPONENT SIDE

D-138(GR)

6 7 8

1 2 3 4 5

AK201450

ACCELERATOR PEDAL
POSITION SENSOR
SIDE CONNECTOR

AB

6 7 8

1 2 3 4 5

AK201451

ACCELERATOR PEDAL
POSITION SENSOR
SIDE CONNECTOR

AB

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-596

STEP 3. Check the continuity at accelerator pedal position
sensor harness side connector D-138.
(1) Disconnect the connector D-138 and measure at the

harness side.

(2) Measure the continuity between terminal No. 1 and ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 7.
NO : Go to Step 4.

STEP 4. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?

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

Connector Inspection

P.00E-2

. Then go to Step 11.

AK200945

3

4

5

1

2

8

6

7

AB

CONNECTOR: D-138

HARNESS
CONNECTOR:
COMPONENT SIDE

D-138(GR)

3

4

5

1

2

8

6

7

AK201452

D-138 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)