Mitsubishi Montero (2002-2004). Manual — part 602

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-105

DTC P0130: Heated Oxygen Sensor Circuit High Voltage (bank 1, sensor 1)

BL

ACK

BL

ACK

BL

ACK

TO PCM

FROM MFI RELAY

WHITE

AK201131

96

109

4

3

1

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

POWERTRAIN CONTROL
MODULE (PCM)

8

9

7

1 2

4

3

B-07

MU802605

2

1

12

23 24 25 26

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20 21 22

27 28 29 30 31 32 33

10 11

D-116

1
5

7 8

3 4
9 10

2
6

D-14

MU801335

Right Bank Heated Oxygen Sensor (front) Circuit

9192

939495

96979899

100

105

113114

115116117

118119120

106

107108109

110111112

101102103

104

D-135

(MU803805)

AK201273

CONNECTOR: B-07

B-07(B)

AB

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

AK201038AF

CONNECTOR: D-135

PCM

D-135(GR)

AK201049

D-14

AB

CONNECTOR: D-14

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-106

.

CIRCUIT OPERATION

• A voltage corresponding to the oxygen concen-

tration in the exhaust gas is sent to the PCM (ter-
minal No. 109) from the output terminal (terminal
No. 4) of the right bank heated oxygen sensor
(front).

• Terminal No. 2 of the right bank heated oxygen

sensor (front) is grounded with PCM (terminal
No. 96).

.

TECHNICAL DESCRIPTION

• The right bank heated oxygen sensor (front)

detects the concentration of oxygen in the
exhaust gas; it converts those data to voltage,
and inputs the resulting signals to the PCM.

• When the right bank heated oxygen sensor

(front) begins to deteriorate, the heated oxygen
sensor signal response becomes poor.

• The PCM forcibly varies the air/fuel mixture to

make it leaner and richer, and checks the
response speed of the right bank heated oxygen
sensor (front). In addition, the PCM also checks
for an open circuit in the right bank heated oxy-
gen sensor (front) output line.

.

DTC SET CONDITIONS

Check Conditions

• 3 minutes or more have passed since the starting

sequence was completed.

• Right bank heated oxygen sensor (front) signal

voltage has continued to be 0.2 volt or lower.

• Engine coolant temperature is higher than 76°C

(169

°F).

• Engine speed is higher than 1,200 r/min.

• Volumetric efficiency is higher than 25 percent.

• Monitoring time: 7 seconds.

Judgment Criteria

• Input voltage supplied to the PCM interface circuit

is higher than 4.5 volts when 5 volts is applied to
the right bank heated oxygen sensor (front) out-
put line via a resistor.

• The PCM monitors for this condition once during

the drive cycle.

.

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

• Right bank heated oxygen sensor (front) deterio-

rated.

• Open circuit in right bank heated oxygen sensor

(front) output line.

• Open circuit in right black heated oxygen sensor

(front) ground line.

• PCM failed.

AK201049

CONNECTOR: D-116

D-116

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-107

DIAGNOSIS

Required Special Tools:

• MB991502: Scan Tool (MUT-II)

• MD998464: Test Harness

STEP 1. Using scan tool MB991502, check data list item 39:
Heated Oxygen Sensor Bank 1, Sensor 1 (right front).

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) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item

39, Heated Oxygen Sensor Bank 1, Sensor 1 (right front).

• Warming up the engine. When the engine is revved, the

output voltage should be 0.6 to 1.0 volt.

• Warming up the engine. When the engine is idling, the

output voltage should repeat 0.4 volt and 0.6 to 1.0 volt
alternately.

(4) 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 : Go to Step 2.

ACX01539

16-PIN

MB991502

AC

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-108

STEP 2. Measure the sensor output voltage at right bank
heated oxygen sensor (front) connector B-07 by
backprobing
(1) Do not disconnect the connector B-07.
(2) Start the engine and run at idle.

(3) Measure the voltage between terminal No. 4 and ground by

backprobing.

• Warming up the engine. When the engine is 2,500 r/min,

the output voltage should repeat 0 to 0.8 volt alternately.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

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

AK201274

1

2

3

4

CONNECTOR: B-07

B-07(B)

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)

AKX01532AC

3

1 2

4

B-07 HARNESS
CONNECTOR:
HARNESS SIDE