Mitsubishi Montero (2002-2004). Manual — part 717
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-565
STEP 11. Check for open circuit and short circuit to ground
and harness damage between manifold differential
pressure sensor connector B-28 (terminal No. 1) and PCM
connector D-135 (terminal No. 101).
Q: Is the harness wire in good condition?
YES : Replace the manifold differential pressure sensor.
Then go to Step 12.
NO : Repair it. Then go to Step 12.
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 P1400 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK200975
1
2
3
AB
HARNESS
CONNECTOR:
COMPONENT SIDE
CONNECTOR: B-28
B-28(B)
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-566
P1601 Communication Malfunction (between PCM and Throttle Actuator Control Module)
.
TECHNICAL DESCRIPTION
• PCM checks the communication lines for abnor-
mal conditions.
.
DTC SET CONDITIONS
Check Conditions
• Battery positive voltage is higher than 6.3 volts.
Judgement Criteria
• PCM detects an error in communication with the
throttle actuator control module for 0.05 seconds.
• Throttle actuator control module detects an error
in communication with the PCM for 0.12 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 P01601 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
ACX01539
16-PIN
MB991502
AC
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-567
DTC P1603: Battery Backup Line Malfunction
.
TECHNICAL DESCRIPTION
• The PCM is checks the open circuit of battery
backup line.
NOTE: When the system detects an open circuit in
the battery backup line, it makes 1 failure judgment
of other diagnostic trouble codes (DTCs).
.
DTC SET CONDITIONS
Check Conditions
• Starting sequence was completed.
• Battery positive voltage is higher than 10 volts.
Judgement Criteria
• Battery backup line voltage has continued to be 6
volts or lower for 2 seconds.
AK201151
WHITE-BLA
CK
WHITE-BLA
CK
FUSIBLE
LINK(5)
58
BATTERY
BACKUP
POWERTRAIN CONTROL
MODULE (PCM)
6
Battery Backup Circuit
31
35363738394041 42 43
444546474849
50 51
5253
545556
57 58
32
33 34
D-133
(MU803803)
A-03
(MU802611)
1 2 3 4 5 6
7 8 9 10 11 12
AK201038
CONNECTOR: D-133
AC
PCM
D-133(GR)
AK201046
A-03(B)
AB
CONNECTOR: A-03
TSB Revision
DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-568
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Open or shorted battery backup line, or loose
connector.
• 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) Erase the DTC.
(4) Start the engine and run it at idle.
(5) Read the DTC.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P1603 set?
YES : Go to Step 2.
NO : The inspection is complete.
STEP 2. Measure the backup power supply voltage at PCM
connector D-133 by backprobing.
(1) Do not disconnect the PCM connector D-133.
(2) Measure the voltage between terminal No. 58 and ground
by backprobing.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 5.
NO : Go to Step 3.
ACX01539
16-PIN
MB991502
AC
AK200939
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
52
53
54
55
56
57
58
50
51
AB
CONNECTOR: D-133
HARNESS CONNECTOR:
COMPONENT SIDE
PCM
D-133(GR)
AK201427
31
35363738394041 42 43
444546474849
50 51
5253
545556
57 58
32
33 34
AB
D-133 HARNESS
CONNECTOR:
HARNESS SIDE
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