Mitsubishi Montero (2002-2004). Manual — part 613
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-149
STEP 9. Check for harness damage between MFI relay
connector B-22X (terminal No. 1) and right bank heated
oxygen sensor (front) connector B-07 (terminal No. 1).
Q: Is the harness wire in good condition?
YES : Go to Step 10.
NO : Repair it. Then go to Step 12.
AK200951
2 1
3
4
B-22X
AB
CONNECTOR: B-22X
HARNESS
CONNECTOR:
COMPONENT SIDE
AK201274
1
2
3
4
CONNECTOR: B-07
B-07(B)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-150
STEP 10. Check for harness damage between right bank
heated oxygen sensor (front) connector B-07 (terminal No.
3) and PCM connector D-132 (terminal No. 25).
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair it. Then go to Step 12.
STEP 11. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to
GROUP 13A, Procedure 6
− Other Monitor
(2) Read in the diagnostic trouble code (DTC).
Q: Is DTC P0135 set?
YES : Replace the PCM. Then go to Step 12.
NO : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
AK201274
1
2
3
4
CONNECTOR: B-07
B-07(B)
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
RIGHT BANK
HEATED OXYGEN
SENSOR (FRONT)
AK200938
2
3
4
5
6
7
8
9
1
10
14
15
16
17
18
19
20
21
22
23
24
25
26
27
11
12
13
AB
CONNECTOR: D-132
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-132(GR)
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-151
STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
GROUP 13A, Procedure 6
− Other Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0135 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
DTC P0136: Heated Oxygen Sensor Circuit High Voltage (bank 1, sensor 2)
WHITE
BL
ACK
BL
ACK
WHITE
BL
ACK
BL
ACK
BL
ACK
2
1
4 5 6
3
AK201133
TO PCM
FROM MFI RELAY
96
117
2
4
3
1
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
E-112
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
POWERTRAIN CONTROL
MODULE (PCM)
9
9
5
4
7
4
3
1 2
C-14
MU802665
Right Bank Heated Oxygen Sensor (rear) Circuit
9192
939495
96979899
100
105
113114
115116117
118119120
106
107108109
110111112
101102103
104
D-135
(MU803805)
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-152
.
CIRCUIT OPERATION
• A voltage corresponding to the oxygen concen-
tration in the exhaust gas is sent to the PCM (ter-
minal No. 117) from the output terminal (terminal
No. 4) of the right bank heated oxygen sensor
(rear).
• Terminal No. 2 of the right bank heated oxygen
sensor (rear) is grounded with PCM (terminal No.
96).
.
TECHNICAL DESCRIPTION
• The output signal of the right bank heated oxygen
sensor (front) is compensated by the output sig-
nal of the right bank heated oxygen sensor (rear).
• The PCM checks for an open circuit in the right
bank heated oxygen sensor (rear) output line.
.
DTC SET CONDITIONS
Check Conditions
• 3 minutes or more have passed since the starting
sequence was completed.
• Right bank heated oxygen sensor (rear) signal
voltage has continued to be 0.15 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 (rear) output
line via a resistor.
• The PCM monitors for this condition once during
the drive cycle.
.
AK201275
CONNECTOR: C-14
C-14(GR)
AB
RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)
AK201049
CONNECTOR: D-116
D-116
AC
AK201038AF
CONNECTOR: D-135
PCM
D-135(GR)
AK201049
D-14
AB
CONNECTOR: D-14
AK201052
E-112
AB
CONNECTOR: E-112
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